TDF8551J I2C-bus controlled 4 × 45 W power amplifier with six voltage regulators Rev. 02 — 18 August 2009 Product data sheet 1. General description 1.1 Amplifiers The TDF8551J has a complementary quad audio power amplifier that uses BCDMOS technology. It contains four amplifiers configured in Bridge-Tied Load (BTL) to drive four speakers: two front and two rear channels. The I2C-bus enables diagnostic information of each amplifier and its speaker to be read separately. Both front and both rear channel amplifiers can be configured independently in line driver mode with a gain of 20 dB (differential output) or amplifier mode with a gain of 26 dB (BTL output). 1.2 Voltage regulators and switches The TDF8551J has six output voltage regulators and two power switches: • • • • Four switchable regulators and two standby regulators Two power switches with loss-of-ground protection and surge protection Second supply pin to reduce dissipation by means of an external DC-to-DC converter Backup functionality for regulator 2 2. Features n Amplifiers u I2C-bus control u Can drive a 2 Ω load with a battery voltage of up to 16 V and a 4 Ω load with a battery voltage of up to 18 V u DC load detection: open, short and present u AC load (tweeter) detection u Programmable clip detect; 1 % or 3 % u Programmable thermal protection pre-warning u Independent short-circuit protection for each channel u Selectable line driver (20 dB) and amplifier mode (26 dB) u Loss-of-ground and open VP safe u All outputs protected from short-circuit to ground, to VP or across the load u All pins protected from short-circuit to ground u Soft thermal-clipping to prevent audio holes u Low battery detection n Voltage regulators and switches u I2C-bus control TDF8551J NXP Semiconductors 4 × 45 W power amplifier with six voltage regulators u Good stability for any regulator with almost any output capacitor value u Six voltage regulators (microcontroller, display, audio processor, tuner, bus, mechanical digital and drive) u Selectable output voltages for regulators 1, 4 and 5 u Low dropout voltage PNP output stages u High supply voltage ripple rejection u Low noise for all regulators u Two power switches (antenna switch and amplifier switch) u Standby regulators 2 and 6 (microcontroller and bus supply) operational during load dump and thermal shutdown u Low standby quiescent current (regulators 2 and 6 operational only) u Second supply pin for connecting optional external DC-to-DC converter to reduce internal dissipation u Backup functionality for regulator 2 n Protection u If connection to the battery voltage is reversed, all regulator voltages will be zero u Withstands output voltages up to 18 V (supply line may be short-circuited) u Thermal protection to avoid thermal breakdown u Load dump protection u Regulator outputs protected from DC short-circuit to ground or to supply voltage u All regulators protected by foldback current limiting u Power switches protected from loss-of-ground and surge conditions 3. Applications n Boost amplifier and voltage regulator for car radios and CD/MD players 4. Quick reference data Table 1. Quick reference data Symbol Parameter Conditions Min Typ Max Unit 8 14.4 18 V Amplifiers VP(oper) operating supply voltage RL = 4 Ω Iq(tot) total quiescent current no load - 280 400 mA Po(max) maximum output power [1] RL = 4 Ω; VP = 14.4 V; VIN = 2 V RMS square wave 39 41 - W RL = 4 Ω; VP = 15.2 V; VIN = 2 V RMS square wave 44 46 - W RL = 2 Ω; VP = 14.4 V; VIN = 2 V RMS square wave 64 69 - W - 0.01 0.1 % line driver mode - 25 35 µV amplifier mode - 50 70 µV THD total harmonic distortion Po = 1 W to 12 W; f = 1 kHz; RL = 4 Ω Vn(o) output noise voltage filter 20 Hz to 22 kHz; Rs = 600 Ω TDF8551J_2 Product data sheet © NXP B.V. 2009. All rights reserved. Rev. 02 — 18 August 2009 2 of 47 TDF8551J NXP Semiconductors 4 × 45 W power amplifier with six voltage regulators Table 1. Quick reference data …continued Symbol Parameter Conditions Min Typ Max Unit regulators 1, 3, 4 and 5 on; switches 1 and 2 on 10 14.4 18 V jump starts for t ≤ 10 minutes - - 30 V Voltage regulators supply voltage VP load dump protection for t ≤ 50 ms and tr ≥ 2.5 ms - - 50 V regulator 1, 3, 4 and 5 on; switches 1 and 2 on 18.1 22 - V 4.75 5.0 VP V - 180 250 µA IB2[D3:D2] = 01 7.9 8.3 8.7 V IB2[D3:D2] = 10 8.1 8.6 9.1 V IB2[D3:D2] = 11 4.75 5.0 5.25 V regulator 2; 0.5 mA ≤ IO ≤ 350 mA; 10 V ≤ VP ≤ 18 V 3.1 3.3 3.5 V regulator 3; 0.5 mA ≤ IO ≤ 525 mA; 5 V ≤ VDCDC ≤ 18 V 3.1 3.3 3.5 V IB2[D7:D5] = 001 4.75 5.0 5.25 V IB2[D7:D5] = 010 5.7 6.0 6.3 V IB2[D7:D5] = 011 6.6 7.0 7.4 V IB2[D7:D5] = 100 8.1 8.6 9.1 V IB2[D7:D5] = 101 7.6 8.0 8.4 V V Vth(dis) disable threshold voltage VDCDC DC-to-DC converter voltage Iq(tot) total quiescent current Standby mode; VP = 14.4 V VO(reg) regulator output voltage regulator 1; 0.5 mA ≤ IO ≤ 400 mA; 10 V ≤ VP ≤ 18 V regulator 4; 0.5 mA ≤ IO ≤ 800 mA; 10 V ≤ VP ≤ 18 V regulator 5; 0.5 mA ≤ IO ≤ 400 mA 10 V ≤ VP ≤ 18 V; IB1[D7:D4] = 0001 5.7 6.0 6.3 10 V ≤ VP ≤ 18 V; IB1[D7:D4] = 0010 6.65 7.0 7.37 V 10 V ≤ VP ≤ 18 V; IB1[D7:D4] = 0011 7.8 8.2 8.6 10.5 V ≤ VP ≤ 18 V; IB1[D7:D4] = 0100 8.55 9.0 9.45 V V 11 V ≤ VP ≤ 18 V; IB1[D7:D4] = 0101 9.0 9.5 10.0 V 11.5 V ≤ VP ≤ 18 V; IB1[D7:D4] = 0110 9.5 10.0 10.5 V 13 V ≤ VP ≤ 18 V; IB1[D7:D4] = 0111 9.9 10.4 10.9 V 14.2 V ≤ VP ≤ 18 V; IB1[D7:D4] = 1000 11.8 12.5 13.2 V 12.5 V ≤ VP ≤ 18 V; IB1[D7:D4] = 1001 VP − 1 VP − 0.5 - 10 V ≤ VP ≤ 18 V; IB1[D7:D4] = 1010 4.75 5.0 5.25 V 10 V ≤ VP ≤ 18 V; IB1[D7:D4] = 1011 3.1 3.3 3.5 regulator 6; 0.5 mA ≤ IO ≤ 100 mA; 10 V ≤ VP ≤ 18 V 4.75 5.0 5.25 V switch 1; IO = 400 mA - 0.6 1.1 V switch 2; IO = 400 mA - 0.6 1.1 V V V Power switches dropout voltage Vdo [1] voltage on pin Vp1 and/or pin Vp2 TDF8551J_2 Product data sheet © NXP B.V. 2009. All rights reserved. Rev. 02 — 18 August 2009 3 of 47 TDF8551J NXP Semiconductors 4 × 45 W power amplifier with six voltage regulators 5. Ordering information Table 2. Ordering information Type number TDF8551J Package Name Description Version DBS37P plastic DIL-bent-SIL power package; 37 leads (lead length 6.8 mm) SOT725-1 TDF8551J_2 Product data sheet © NXP B.V. 2009. All rights reserved. Rev. 02 — 18 August 2009 4 of 47 TDF8551J NXP Semiconductors 4 × 45 W power amplifier with six voltage regulators 6. Block diagram 28 REGULATOR 6 BUCAP 36 VDCDC 35 26 ENABLE LOGIC REGULATOR 1 30 REGULATOR 3 31 REGULATOR 4 33 REGULATOR 5 34 SWITCH 1 29 SWITCH 2 27 32 SDA SCL STB IN1 20 2 6 TDF8551J 4 25 22 STANDBY/MUTE 11 I2C-BUS INTERFACE REG1 REG3 REG4 REG5 SW1 SW2 GND VP1 VP2 DIAG CLIP DETECT/DIAGNOSTIC 9 MUTE REG2 TEMPERATURE AND LOAD DUMP PROTECTION VOLTAGE REGULATOR REFERENCE VOLTAGE BACKUP SWITCH VP 37 REGULATOR 2 REG6 26 dB/ 20 dB 7 OUT1+ OUT1− PROTECTION/ DIAGNOSTIC IN2 15 17 MUTE 26 dB/ 20 dB 19 OUT2+ OUT2− PROTECTION/ DIAGNOSTIC IN3 12 5 MUTE 26 dB/ 20 dB 3 OUT3+ OUT3− PROTECTION/ DIAGNOSTIC IN4 14 21 MUTE 26 dB/ 20 dB VP 23 OUT4+ OUT4− PROTECTION/ DIAGNOSTIC TEMPERATURE AND LOAD DUMP PROTECTION AMPLIFIER 10 SVR 13 16 SGND ACGND Fig 1. 8 1 18 24 PGND1 PGND3 PGND2/TAB PGND4 001aaj105 Block diagram TDF8551J_2 Product data sheet © NXP B.V. 2009. All rights reserved. Rev. 02 — 18 August 2009 5 of 47 TDF8551J NXP Semiconductors 4 × 45 W power amplifier with six voltage regulators 7. Pinning information 7.1 Pinning PGND2/TAB 1 SDA 2 OUT3− 3 SCL 4 OUT3+ 5 VP2 6 OUT1− 7 PGND1 8 OUT1+ 9 SVR 10 IN1 11 IN3 12 SGND 13 IN4 14 IN2 15 ACGND 16 OUT2+ 17 PGND3 18 OUT2− 19 TDF8551J VP1 20 OUT4+ 21 STB 22 OUT4− 23 PGND4 24 DIAG 25 VDCDC 26 SW2 27 REG6 28 SW1 29 REG1 30 REG3 31 GND 32 REG4 33 REG5 34 VP 35 BUCAP 36 REG2 37 001aaj106 Fig 2. Pin configuration TDF8551J_2 Product data sheet © NXP B.V. 2009. All rights reserved. Rev. 02 — 18 August 2009 6 of 47 TDF8551J NXP Semiconductors 4 × 45 W power amplifier with six voltage regulators 7.2 Pin description Table 3. Pin description Symbol Pin Description PGND2/TAB 1 power ground 2 and connection for heatsink SDA 2 I2C-bus data input and output OUT3− 3 channel 3 negative output SCL 4 I2C-bus clock input OUT3+ 5 channel 3 positive output VP2 6 power supply voltage 2 to amplifiers OUT1− 7 channel 1 negative output PGND1 8 power ground 1 OUT1+ 9 channel 1 positive output SVR 10 half supply voltage filter capacitor IN1 11 channel 1 input IN3 12 channel 3 input SGND 13 signal ground IN4 14 channel 4 input IN2 15 channel 2 input ACGND 16 AC ground OUT2+ 17 channel 2 positive output PGND3 18 power ground 3 OUT2− 19 channel 2 negative output VP1 20 power supply voltage 1 to amplifiers OUT4+ 21 channel 4 positive output STB 22 standby, operating or mute mode select input OUT4− 23 channel 4 negative output PGND4 24 power ground 4 DIAG 25 diagnostic and clip detection output, active-LOW VDCDC 26 power supply voltage from optional DC-to-DC converter SW2 27 antenna switch; supplies unregulated power to car aerial motor REG6 28 regulator 6 output; supply for bus controller SW1 29 amplifier switch; supplies unregulated power to amplifiers REG1 30 regulator 1 output; supply for audio part of radio and CD player REG3 31 regulator 3 output; supply for signal processor part (mechanical digital) of CD player GND 32 combined voltage regulator, power and signal ground REG4 33 regulator 4 output; supply for mechanical part (mechanical drive) of CD player REG5 34 regulator 5 output; supply for display part of radio and CD player VP 35 power supply to voltage regulators BUCAP 36 connection for backup capacitor REG2 37 regulator 2 output; supply voltage to microcontroller TDF8551J_2 Product data sheet © NXP B.V. 2009. All rights reserved. Rev. 02 — 18 August 2009 7 of 47 TDF8551J NXP Semiconductors 4 × 45 W power amplifier with six voltage regulators 8. Functional description The TDF8551J is an IC which provides six voltage regulators in combination with four independent, BTL configured, power amplifiers and diagnostic capabilities. All regulator output voltages except regulators 2 and 6 can be controlled via the I2C-bus. The amplifier diagnostic functions give information about output offset, load, or short-circuit. The diagnostic functions are controlled using the I2C-bus. The TDF8551J is protected against short-circuit, overtemperature, open ground and open VP connections. If a short-circuit occurs at the output of a single amplifier, that channel shuts down and the other channels continue to operate normally. The short-circuited channel can be switched off by the microcontroller using the appropriate enable bit of the I2C-bus to prevent any noise generated by the fault condition from being heard. 8.1 Start-up At power on, regulators 2 and 6 reach their final voltage when the backup capacitor voltage exceeds 5.5 V, independently of the voltage on pin STB. When pin STB is LOW, the total quiescent current is low and the I2C-bus lines are high-impedance. When pin STB is HIGH, the I2C-bus is biased on and the TDF8551J performs a power-on reset. When bit IB1[D0] is set, the amplifier is activated, DB2[D7] (power-on reset occurred) is reset and pin DIAG is no longer held LOW. 8.2 Start-up and shutdown timing See Figure 12. A capacitor connected to pin SVR enables smooth start-up and shutdown, preventing the amplifier from producing audible clicks at switch-on or switch-off. The start-up and shutdown times can be extended by increasing the capacitor value. If the amplifier is shutdown using pin STB, it is muted, the regulators and switches are switched off, and the capacitor connected to pin SVR discharges. The low-current Standby mode is activated 2 seconds after pin STB goes LOW. 8.3 Power-on reset and supply voltage spikes See Figure 13 and Figure 14. If the supply voltage drops too low to guarantee the integrity of the data in the I2C-bus latches, the power-on reset cycle will start. All latches will be set to a predefined state, pin DIAG will be pulled LOW to indicate that a power-on reset has occurred, and bit DB2[D7] is also set for the same reason. When IB1[D0] is set, the power-on flag resets, pin DIAG is released and the amplifier enters its start-up cycle. 8.4 Diagnostic output Pin DIAG indicates clipping, thermal protection pre-warning of amplifier and voltage regulator parts, short-circuit protection and low and high battery voltage. Pin DIAG is an active-LOW, open-drain output which must be connected to an external voltage using an external pull-up resistor. If a failure occurs, pin DIAG remains LOW during the failure and no clipping information is available. The microcontroller can read the failure information using the I2C-bus. TDF8551J_2 Product data sheet © NXP B.V. 2009. All rights reserved. Rev. 02 — 18 August 2009 8 of 47 TDF8551J NXP Semiconductors 4 × 45 W power amplifier with six voltage regulators 8.5 Amplifiers 8.5.1 Muting Both a hard mute and a soft mute can be performed using the I2C-bus. A hard mute mutes the amplifier within 0.5 ms. A soft mute mutes the amplifier within 20 ms and is less audible. A hard mute is also activated if a voltage of 8 V is applied to pin STB. 8.5.2 Temperature protection If the average junction temperature rises to the temperature trigger value that has been set using the I2C-bus, a thermal protection pre-warning is activated making pin DIAG LOW. If the temperature continues to rise, all four channels are muted to reduce the output power (soft thermal clipping). However, the value at which the temperature mute control activates is fixed; only the temperature at which the thermal protection pre-warning signal occurs can be specified by bit IB3[D4]. If applying the temperature mute control does not reduce the average junction temperature, all the power stages will be switched off (muted) at the absolute maximum temperature Tj(max). 8.5.3 Offset detection Offset detection can only be performed when there is no input signal to the amplifiers, for instance when the external digital signal processor is muted after a start-up. The output voltage of each channel is measured and compared with a reference voltage. If the output voltage of a channel is greater than the reference voltage, bit D2 of the associated data byte is set and read by the microcontroller during a read instruction. Note that the value of this bit is only meaningful when there is no input signal and the amplifier is not muted. Offset detection is always enabled. 8.5.4 Speaker protection If one side of a speaker is connected to ground, the missing current protection is triggered to prevent damage to the speaker. A fault condition is detected in a channel when there is a mismatch between the power current in the high-side and the power current in the low-side; during a fault condition the channel will be switched off. The load status of each channel can be read using the I2C-bus: short to ground (one side of the speaker connected to ground), short to VP (one side of the speaker connected to VP) and shorted load. 8.5.5 Line driver mode An amplifier can be used as a line-driver by switching it to low-gain mode. In normal mode, the gain between single-ended input and differential output (across the load) is 26 dB. In low-gain mode the gain between single-ended input and differential output is 20 dB. 8.5.6 Input and AC ground capacitor values The negative inputs to all four amplifier channels are combined at pin ACGND. To obtain the best performance of supply voltage ripple rejection and unwanted audible noise, the value of the capacitor connected to pin ACGND must be as close as possible to 4 times the value of the input capacitor connected to the positive input of each channel. TDF8551J_2 Product data sheet © NXP B.V. 2009. All rights reserved. Rev. 02 — 18 August 2009 9 of 47 TDF8551J NXP Semiconductors 4 × 45 W power amplifier with six voltage regulators 8.5.7 Load detection 8.5.7.1 DC load detection When DC load detection is enabled, during the start-up cycle, a DC-offset is applied slowly to the amplifier outputs and the output currents are measured. If the output current of an amplifier rises above a certain level, it is assumed that there is a load of less than 6 Ω and bit D5 is reset in the associated data byte register to indicate that a load is detected. The offset is measured during the amplifier start-up cycle which means detection is inaudible and can be performed every time the amplifier is switched on. 8.5.7.2 AC load detection AC load detection can be used to detect that AC-coupled speakers are connected correctly during assembly. This requires at least 3 periods of a 19 kHz sine wave to be applied to the amplifier inputs. The amplifier produces a peak output voltage which also generates a peak output current through the AC-coupled speaker. The 19 kHz sine wave is also audible during the test. If the amplifier detects three current peaks that are greater than 550 mA, the AC load detection bit is set. Three current peaks are counted to avoid false AC load detection which can occur if the input signal is switched on and off. The peak current counter can be reset by setting bit IB1[D1] to logic 0. To guarantee AC load detection, an amplifier current of more than 550 mA is required. AC load detection never occurs with a current of less than 150 mA. Figure 3 shows which AC loads are detected at different output voltages. For example, if a load is detected at an output voltage of 2.5 V peak, the load is less than 4 Ω. If no load is detected, the output impedance is more than 14 Ω. 001aai691 102 (1) no load present ZL (Ω) undefined (2) 10 load present 1 0 2.5 5 7.5 10 VoM (V) (1) IoM = < 150 mA. (2) IoM = > 550 mA. Fig 3. Tolerance of AC load detection as a function of output voltage TDF8551J_2 Product data sheet © NXP B.V. 2009. All rights reserved. Rev. 02 — 18 August 2009 10 of 47 TDF8551J NXP Semiconductors 4 × 45 W power amplifier with six voltage regulators 8.5.7.3 Load detection procedure 1. At start-up, enable the AC or DC load detection by setting bit IB1[D1] to logic 1. 2. After 250 ms the DC load is detected and the mute is released. This is inaudible and can be implemented each time the IC is powered on. 3. When the amplifier start-up cycle is completed (after 1.5 s), apply an AC signal to the input, and DC load bits D5 of each data byte should be read and stored by the microcontroller. 4. After at least 3 periods of the input signal, the load status can be checked by reading AC detect bits D4 of each data byte. The AC load peak current counter can be reset by setting bit IB1[D1] to logic 0 and then to logic 1. Note that this will also reset the DC load detection bits D5 in each data byte. 8.5.8 Low headroom protection The normal DC output voltage of the amplifier is set to half the supply voltage and is related to the voltage on pin SVR. An external capacitor is connected to pin SVR to suppress power supply ripple. If the supply voltage drops (at vehicle engine start), the DC output voltage will follow slowly due to the affect of the SVR capacitor. The headroom voltage is the voltage required for correct operation of the amplifier and is defined as the voltage difference between the level of the DC output voltage before the VP voltage drop and the level of VP after the voltage drop (see Figure 4). At a certain supply voltage drop, the headroom voltage will be insufficient for correct operation of the amplifier. To prevent unwanted audible noises at the output, the headroom protection mode will be activated (see Figure 4). This protection discharges the capacitors connected to pins SVR and ACGND to increase the headroom voltage. supply (V) 14 vehicle engine start VP headroom voltage SVR voltage 8.4 7 amplifier DC output voltage t (s) 001aai692 Fig 4. Amplifier output during supply voltage drop 8.6 Voltage regulators and switches The TDF8551J has six output voltage regulators and two power switches: • Four switchable regulators and two standby regulators • Two power switches with loss-of-ground protection and surge protection TDF8551J_2 Product data sheet © NXP B.V. 2009. All rights reserved. Rev. 02 — 18 August 2009 11 of 47 TDF8551J NXP Semiconductors 4 × 45 W power amplifier with six voltage regulators • Second supply pin to reduce dissipation by means of an external DC-to-DC converter • Backup functionality for regulator 2 The TDF8551J uses low dropout voltage regulators for use in low voltage applications. All of the voltage regulators except for the standby regulators can be controlled using the I2C-bus. The TDF8551J also has two power switches which can deliver unregulated continuous current and several fail-safe protection modes. It conforms to peak transient tests and protects against continuous high voltage (24 V), short-circuits and thermal stress. Standby regulators 2 and 6 will try to maintain output for as long as possible even if a thermal shutdown or any other fault condition occurs. During overvoltage stress conditions, all outputs except regulators 2 and 6 will switch-off and the device will be able to supply a minimum current for an indefinite amount of time sufficient for powering the memory of a microcontroller and bus controller functionality. Provision is made for an external reserve supply capacitor to be connected to pin BUCAP which can store enough energy to allow regulator 2 to supply a microcontroller for a period long enough for it to prepare for a loss-of-voltage. 8.6.1 Standby regulator outputs Standby outputs (regulators 2 and 6) are used for the microcontroller and bus controller supply. These regulators will not shutdown with the switched regulators and cannot be controlled by the I2C-bus. The standby regulators will not shutdown during load dump transients or by high temperature protection. 8.6.2 Backup capacitor A backup capacitor (Cbackup) is used as a backup supply for the regulator 2 output when the battery supply voltage (VP) cannot support the regulator 2 voltage. 8.6.3 Backup function The backup function is implemented by a switch function, which behaves like an ideal diode between pins VP and BUCAP; the forward voltage of this ideal diode depends on the current flowing through it. The backup function supplies regulator 2 during brief periods when no supply voltage is present on pin VP. It requires an external capacitor to be connected to pin BUCAP and ground. When the supply voltage is present on pin VP this capacitor will be charged to a level of VP − 0.3 V. When the supply voltage is absent from pin VP, this charge can then be used to supply regulator 2 for a brief period (tbackup) calculated using the formula: V P – ( V REG2 – 0.5 ) t backup = C backup × R L × ----------------------------------------------- V REG2 (1) Example: VP = 14.4 V, VREG2 (voltage on pin REG2) = 3.3 V, RL = 1 kΩ and Cbackup = 100 µF provides a tbackup of 321 ms. When an overvoltage condition occurs, the voltage on pin BUCAP is limited to approximately 24 V; see Figure 5. TDF8551J_2 Product data sheet © NXP B.V. 2009. All rights reserved. Rev. 02 — 18 August 2009 12 of 47 TDF8551J NXP Semiconductors 4 × 45 W power amplifier with six voltage regulators supply (V) VP VBUCAP VREG2 t (s) tbackup out of regulation 001aai693 V P – ( V REG2 – 0.5 ) t backup = C backup × ------------------------------------------------ I load Fig 5. Backup capacitor function 8.6.4 Power switches There are two power switches that provide an unregulated DC voltage output for amplifiers and an aerial motor respectively. The switches have internal protection for overtemperature conditions and are activated by setting bits IB1[D2] and IB1[D3] to logic 1. In the ON state, the switches have a low impedance to the battery voltage. When the battery voltage is higher than 22 V, the switches are switched off. When the battery voltage is below 22 V the switches are set to their original condition. The power switches have built-in surge protection to be able to absorb energy from switching inductive or capacitive external loads. This surge protection is implemented in such a way that in case no supply (VP) is present the supply line will not be charged from a possible external source connected to a power switch output. 8.6.5 External DC-to-DC converter The VDCDC supply pin can be connected to an external DC-to-DC down converter (VO ≥ 5 V) to reduce the dissipation in regulator 3. If no external DC-to-DC converter is used, the VDCDC pin must be connected to VP. 8.6.6 Protection All regulator and switch outputs are fully protected by foldback current limiting against load dumps and short-circuits; see Figure 6. During a load dump all regulator outputs, except the output of regulators 2 and 6, will go low. The power switches can withstand ‘loss-of-ground’. This means that if pin GND becomes disconnected, the switch is protected by automatically connecting its outputs to ground. 8.6.7 Temperature protection If the junction temperature of a regulator becomes too high, the amplifier(s) are switched off to prevent unwanted noise signals being audible. A regulator junction temperature that is too high is indicated by pin DIAG going LOW and is also indicated by setting bit DB2[D6]. TDF8551J_2 Product data sheet © NXP B.V. 2009. All rights reserved. Rev. 02 — 18 August 2009 13 of 47 TDF8551J NXP Semiconductors 4 × 45 W power amplifier with six voltage regulators If the junction temperature of the regulator continues to rise and reaches the maximum temperature protection level, all regulators and switches will be disabled except regulators 2 and 6. VREGn IOS IREGn IOlim 001aai698 Fig 6. Foldback current protection 8.7 I2C-bus specification 0 = write 1 = read MSB 1 LSB 1 0 1 1 0 0 R/W mdb516 Fig 7. Address byte If address byte bit R/W = 0, the TDF8551J expects three instruction bytes: IB1, IB2 and IB3; see Table 1 to Table 6. After a power-on, all instruction bits are set to zero. If address byte bit R/W = 1, the TDF8551J will send four data bytes to the microcontroller: DB1, DB2, DB3 and DB4; see Table 7 to Table 10. SDA SCL S P START condition STOP condition mba608 Fig 8. Definition of start and stop conditions TDF8551J_2 Product data sheet © NXP B.V. 2009. All rights reserved. Rev. 02 — 18 August 2009 14 of 47 TDF8551J NXP Semiconductors 4 × 45 W power amplifier with six voltage regulators SDA SCL change of data allowed data line stable; data valid Fig 9. mba607 Bit transfer I2C-bus WRITE SCL 1 SDA MSB 2 7 MSB − 1 S 8 LSB + 1 ADDRESS 9 ACK 1 MSB 2 MSB − 1 A W 7 LSB + 1 8 LSB WRITE DATA 9 ACK A P To stop the transfer, after the last acknowledge (A) a stop condition (P) must be generated I2C-bus READ SCL 1 SDA MSB 2 7 MSB − 1 S 8 LSB + 1 ADDRESS 9 ACK R 1 MSB 2 7 MSB − 1 A LSB + 1 8 LSB READ DATA : generated by slave : start P : stop A : acknowledge R/W ACK A P To stop the transfer, the last byte must not be acknowledged and a stop condition (P) must be generated : generated by master (microcontroller) S 9 001aaj256 : read / write Fig 10. I2C-bus read and write modes Table 4. Instruction byte IB1 bit description Bit Symbol Description 7 D7 regulator 5 output voltage control; see Table 5 6 D6 5 D5 4 D4 3 D3 SW2 control 0 = SW2 off 1 = SW2 on TDF8551J_2 Product data sheet © NXP B.V. 2009. All rights reserved. Rev. 02 — 18 August 2009 15 of 47 TDF8551J NXP Semiconductors 4 × 45 W power amplifier with six voltage regulators Table 4. Instruction byte IB1 bit description …continued Bit Symbol Description 2 D2 SW1 control 0 = SW1 off 1 = SW1 on 1 D1 AC load or DC load detection switch 0 = AC load or DC load detection off; resets DC load detection bits and AC load detection peak current counter 1 = AC load or DC load detection on 0 D0 amplifier start enable (clear power-on reset flag DB2[D7]) 0 = amplifier off; pin DIAG remains LOW 1 = amplifier on; when power-on occurs, bit DB2[D7] is reset and pin DIAG is released Table 5. Regulator 5 (display) output voltage control Bit Output (V) D7 D6 D5 D4 0 0 0 0 0 (off) 0 0 0 1 6.0 0 0 1 0 7.0 0 0 1 1 8.2 0 1 0 0 9.0 0 1 0 1 9.5 0 1 1 0 10.0 0 1 1 1 10.4 1 0 0 0 12.5 1 0 0 1 ≤ VP − 1 (switch) 1 0 1 0 5.0 1 0 1 1 3.3 Table 6. Instruction byte IB2 bit description Bit Symbol Description 7 D7 regulator 4 output voltage control; see Table 7 6 D6 5 D5 4 D4 regulator 3 (mechanical digital) control 0 = regulator 3 off 1 = regulator 3 on 3 D3 2 D2 1 D1 regulator 1 output voltage control; see Table 8 soft mute all amplifier channels (mute delay 20 ms) 0 = mute off 1 = mute on TDF8551J_2 Product data sheet © NXP B.V. 2009. All rights reserved. Rev. 02 — 18 August 2009 16 of 47 TDF8551J NXP Semiconductors 4 × 45 W power amplifier with six voltage regulators Table 6. Instruction byte IB2 bit description …continued Bit Symbol Description 0 D0 hard mute all amplifier channels (mute delay 0.4 ms) 0 = mute off 1 = mute on Table 7. Regulator 4 (mechanical drive) output voltage control Bit Output (V) D7 D6 D5 0 0 0 0 (off) 0 0 1 5 0 1 0 6 0 1 1 7 1 0 0 8.6 1 0 1 8.0 Table 8. Regulator 1 (audio) output voltage control Bit Output (V) D3 D2 0 0 0 (off) 0 1 8.3 1 0 8.6 1 1 5.0 Table 9. Instruction byte IB3 bit description Bit Symbol Description 7 D7 clip detection level 0 = 3 % detection level 1 = 1 % detection level 6 D6 amplifier channels 1 and 2 gain select 0 = 26 dB gain (normal mode) 1 = 20 dB gain (line-driver mode) 5 D5 amplifier channels 3 and 4 gain select 0 = 26 dB gain (normal mode) 1 = 20 dB gain (line-driver mode) 4 D4 amplifier thermal protection pre-warning 0 = warning at 145 °C 1 = warning at 122 °C 3 D3 disable channel 1 0 = enable channel 1 1 = disable channel 1 TDF8551J_2 Product data sheet © NXP B.V. 2009. All rights reserved. Rev. 02 — 18 August 2009 17 of 47 TDF8551J NXP Semiconductors 4 × 45 W power amplifier with six voltage regulators Table 9. Instruction byte IB3 bit description …continued Bit Symbol Description 2 D2 disable channel 2 0 = enable channel 2 1 = disable channel 2 1 D1 disable channel 3 0 = enable channel 3 1 = disable channel 3 0 D0 disable channel 4 0 = enable channel 4 1 = disable channel 4 Table 10. Instruction byte DB1 bit description Bit Symbol Description 7 D7 amplifier thermal protection pre-warning 0 = no warning 1 = junction temperature above pre-warning level 6 D6 amplifier maximum thermal protection 0 = junction temperature below 175 °C 1 = junction temperature above 175 °C 5 D5 channel 4 DC load detection 0 = DC load detected 1 = no DC load detected 4 D4 channel 4 AC load detection 0 = no AC load detected 1 = AC load detected 3 D3 channel 4 load short-circuit 0 = normal load 1 = short-circuit load 2 D2 channel 4 output offset 0 = no output offset 1 = output offset 1 D1 channel 4 VP short-circuit 0 = no short-circuit to VP 1 = short-circuit to VP 0 D0 channel 4 short-circuit to ground 0 = no short-circuit to ground 1 = short-circuit to ground TDF8551J_2 Product data sheet © NXP B.V. 2009. All rights reserved. Rev. 02 — 18 August 2009 18 of 47 TDF8551J NXP Semiconductors 4 × 45 W power amplifier with six voltage regulators Table 11. Data byte DB2 bit description Bit Symbol Description 7 D7 Power-on reset occurred or amplifier status 0 = amplifier on 1 = POR has occurred; amplifier off 6 D6 regulator thermal protection pre-warning 0 = no warning 1 = regulator temperature too high; amplifier off 5 D5 channel 3 DC load detection 0 = DC load detected 1 = no DC load detected 4 D4 channel 3 AC load detection 0 = no AC load detected 1 = AC load detected 3 D3 channel 3 load short-circuit 0 = normal load 1 = short-circuit load 2 D2 channel 3 output offset 0 = no output offset 1 = output offset 1 channel 3 VP short-circuit D1 0 = no short-circuit to VP 1 = short-circuit to VP 0 D0 channel 3 short-circuit to ground 0 = no short-circuit to ground 1 = short-circuit to ground Table 12. Data byte DB3 bit description Bit Symbol Description 7 D7 - 6 D6 - 5 D5 channel 2 DC load detection 0 = DC load detected 1 = no DC load detected 4 D4 channel 2 AC load detection 0 = no AC load detected 1 = AC load detected 3 D3 channel 2 load short-circuit 0 = normal load 1 = short-circuit load 2 D2 channel 2 output offset 0 = no output offset 1 = output offset TDF8551J_2 Product data sheet © NXP B.V. 2009. All rights reserved. Rev. 02 — 18 August 2009 19 of 47 TDF8551J NXP Semiconductors 4 × 45 W power amplifier with six voltage regulators Table 12. Data byte DB3 bit description …continued Bit Symbol Description 1 D1 channel 2 VP short-circuit 0 = no short-circuit to VP 1 = short-circuit to VP 0 D0 channel 2 short-circuit to ground 0 = no short-circuit to ground 1 = short-circuit to ground Table 13. Data byte DB4 bit description Bit Symbol Description 7 D7 - 6 D6 - 5 D5 channel 1 DC load detection 0 = DC load detected 1 = no DC load detected 4 D4 channel 1 AC load detected 0 = no AC load detected 1 = AC load detected 3 D3 channel 1 load short-circuit 0 = normal load 1 = short-circuit load 2 D2 channel 1 output offset 0 = no output offset 1 = output offset 1 D1 channel 1 short-circuit to VP 0 = no short-circuit to VP 1 = short-circuit to VP 0 D0 channel 1 short-circuit to ground 0 = no short-circuit to ground 1 = short-circuit to ground 9. Limiting values Table 14. Limiting values In accordance with the Absolute Maximum Rating System (IEC 60134). Symbol Parameter Conditions Min Max Unit VP supply voltage operating - 18 V not operating −1 +50 V jump starts for t ≤ 10 minutes - 30 V load dump protection for t ≤ 50 ms and tr ≥ 2.5 ms 0 50 V operating 0 7 V VSDA voltage on pin SDA TDF8551J_2 Product data sheet © NXP B.V. 2009. All rights reserved. Rev. 02 — 18 August 2009 20 of 47 TDF8551J NXP Semiconductors 4 × 45 W power amplifier with six voltage regulators Table 14. Limiting values …continued In accordance with the Absolute Maximum Rating System (IEC 60134). Symbol Parameter Conditions Min Max Unit VSCL voltage on pin SCL operating 0 7 V VI input voltage pins INn, SVR, ACGND, DIAG, operating 0 13 V VSTB voltage on pin STB operating 0 24 V IOSM non-repetitive peak output current - 10 A IORM repetitive peak output current - 6 A VP(sc) short-circuit supply voltage across output pin loads and to ground or supply (AC and DC) - 18 V VP(r) reverse supply voltage voltage regulator only - −18 V Tcase = 70 °C Ptot total power dissipation - 80 W Tj junction temperature - 150 °C Tstg storage temperature −55 +150 °C Tamb ambient temperature °C VESD electrostatic discharge voltage −40 +85 [1] - 2000 V [2] - 200 V [1] Human body model: Rs = 1.5 kΩ; C = 100 pF; all pins have passed all tests to 2500 V to guarantee 2000 V, according to class II. [2] Machine model: Rs = 10 Ω; C = 200 pF; L = 0.75 mH; all pins have passed all tests to 250 V to guarantee 200 V, according to class II. 10. Thermal characteristics Table 15. Thermal characteristics Symbol Parameter Conditions Typ Unit Rth(j-a) thermal resistance from junction to ambient in free air 40 K/W Rth(j-c) thermal resistance from junction to case see Figure 11 0.75 K/W Virtual junction Amplifier Voltage regulator 0.5 K/W 1 K/W 0.2 K/W Case mdb514 Fig 11. Equivalent thermal resistance network 10.1 Quality specification In accordance with “General Quality Specification for Integrated Circuits SNW-FQ-611D”. TDF8551J_2 Product data sheet © NXP B.V. 2009. All rights reserved. Rev. 02 — 18 August 2009 21 of 47 TDF8551J NXP Semiconductors 4 × 45 W power amplifier with six voltage regulators 11. Characteristics Table 16. Characteristics Tamb = 25 °C; VDCDC; VP = 14.4 V; RL = 4 Ω; measured in the test circuit Figure 26; unless otherwise specified. Symbol Parameter Conditions Min Typ Max Unit RL = 4 Ω 8 14.4 18 V RL = 2 Ω 8 14.4 16 V no load - 280 400 mA - 10 50 µA DC - 7.2 - V 6.5 7 8 V Amplifier Supply voltage behavior VP(oper) operating supply voltage Iq(tot) total quiescent current Istb standby current VO output voltage VP(low)(mute) low supply voltage mute Vhr headroom voltage when headroom protection is activated; see Figure 4 - 1.4 - V VPOR power-on reset voltage see Figure 13 - 5.5 - V VO(offset) output offset voltage mute mode and power on −100 0 +100 mV Mode select (pin STB) VSTB II voltage on pin STB input current Standby mode - - 1.3 V operating mode 2.5 - 5.5 V mute mode 8 - VP V VSTB = 5 V - 4 25 µA Start-up, shutdown and mute timing twake wake-up time from standby before first I2C-bus transmission is recognized; via pin STB; see Figure 12 - 300 500 µs td(mute_off) mute off delay time via I2C-bus IB1[D0]; CSVR = 22 µF; see Figure 12 - 250 - ms td(mute-on) delay time from mute to on soft mute; via I2C-bus IB2[D1] = 1 to 0 10 25 40 ms hard mute; via I2C-bus IB2[D0] = 1 to 0 10 25 40 ms via pin STB; VSTB = 8 V to 4 V 10 25 40 ms soft mute; via I2C-bus IB2[D1] = 0 to 1 10 25 40 ms hard mute; via I2C-bus IB2[D0] = 0 to 1 - 0.4 1 ms via pin STB; VSTB = 4 V to 8 V - 0.4 1 ms td(on-mute) delay time from on to mute I2C-bus interface VIL LOW-level input voltage on pins SCL and SDA - - 1.5 V VIH HIGH-level input voltage on pins SCL and SDA 2.3 - 5.5 V VOL LOW-level output voltage on pin SDA; Iload = 3 mA - - 0.4 V fSCL SCL clock frequency - - 400 kHz TDF8551J_2 Product data sheet © NXP B.V. 2009. All rights reserved. Rev. 02 — 18 August 2009 22 of 47 TDF8551J NXP Semiconductors 4 × 45 W power amplifier with six voltage regulators Table 16. Characteristics …continued Tamb = 25 °C; VDCDC; VP = 14.4 V; RL = 4 Ω; measured in the test circuit Figure 26; unless otherwise specified. Symbol Parameter Conditions Min Typ Max Unit fault condition (pin LOW); IDIAG_N = 200 µA - - 0.8 V ±1.5 ±2 ±2.5 V Amplifier diagnostics VOL(DIAG_N) LOW-level output voltage on pin DIAG VO(offset) output offset voltage THDclip total harmonic distortion clip detection level IB3[D7] = 0 - 3 - % IB3[D7] = 1 - 1 - % pre-warning average junction temperature IB3[D4] = 0 135 145 155 °C IB3[D4] = 1 112 122 132 °C Tj(AV)(mute) mute average junction temperature VIN = 0.05 V; −3 dB muting 150 160 170 °C Tj(AV)(off) average junction temperature for off all outputs switched off 165 175 185 °C ZL load impedance DC load detected - - 6 Ω no DC load detected 500 - - Ω AC load detected 550 - - mA no AC load detected - - 150 mA RL = 4 Ω; VP = 14.4 V; THD = 0.5 % 18 19 - W RL = 4 Ω; VP = 14.4 V; THD = 10 % 25 26 - W RL = 2 Ω; VP = 14.4 V; THD = 0.5 % 27 31 - W RL = 2 Ω; VP = 14.4 V; THD = 10 % 40 44 - W RL = 4 Ω; VP = 14.4 V; VIN = 2 V RMS square wave 39 41 - W RL = 4 Ω; VP = 15.2 V; VIN = 2 V RMS square wave 44 46 - W RL = 2 Ω; VP = 14.4 V; VIN = 2 V RMS square wave 64 69 - W Po = 1 W to 12 W; f = 1 kHz; RL = 4 Ω - 0.01 0.1 % Po = 1 W to 12 W; f = 10 kHz - 0.2 0.5 % Po = 4 W; f = 1 kHz - 0.01 0.03 % line driver mode; Vo = 2 V (RMS); f = 1 kHz; RL = 600 Ω - 0.01 0.03 % f = 1 Hz to 10 kHz; Rs = 600 Ω 50 60 - dB Tj(AV)(pwarn) Idet(load) load detection current Amplifier Po Po(max) THD output power maximum output power total harmonic distortion αcs channel separation Po = 4 W; f = 1 kHz - 80 - dB SVRR supply voltage rejection ratio f = 100 Hz to 10 kHz; Rs = 600 Ω 55 70 - dB CMRR common mode rejection ratio amplifier mode; Vcm = 0.3 V (p-p); f = 1 kHz to 3 kHz; Rs = 0 Ω 40 70 - dB TDF8551J_2 Product data sheet © NXP B.V. 2009. All rights reserved. Rev. 02 — 18 August 2009 23 of 47 TDF8551J NXP Semiconductors 4 × 45 W power amplifier with six voltage regulators Table 16. Characteristics …continued Tamb = 25 °C; VDCDC; VP = 14.4 V; RL = 4 Ω; measured in the test circuit Figure 26; unless otherwise specified. Symbol Parameter Conditions Min Typ Max Unit - - 0.6 V line driver mode - 25 35 µV amplifier mode - 50 70 µV Vcm(max)(rms) maximum common mode voltage (rms f = 1 kHz value) Vn(o) output noise voltage filter 20 Hz to 22 kHz; Rs = 600 Ω Gv(amp) voltage gain amplifier mode single-ended in to differential out 25 26 27 dB Gv(ld) voltage gain line driver mode single-ended in to differential out 19 20 21 dB Zi input impedance Cin = 220 nF 55 70 - kΩ αmute mute attenuation VO(on)/Vo(mute) 80 90 - dB Vo(mute) mute output voltage Vi = 1 V RMS - 70 - µV Bp power bandwidth −1 dB; THD = 1 % - 20 - kHz regulator 1, 3, 4 and 5 on; switches 1 and 2 on 10.0 14.4 18 V standby regulator 2 in regulation 5.0 - 50 V standby regulator 6 in regulation 6.0 - 50 V regulator 1, 3, 4 and 5 on; switches 1 and 2 on 18.1 22 - V 4.75 5.0 VP V - 180 250 µA IB2[D3:D2] = 01 7.9 8.3 8.7 V IB2[D3:D2] = 10 8.1 8.6 9.1 V Voltage regulators VP supply voltage Vth(dis) disable threshold voltage VDCDC DC-to-DC converter voltage Iq(tot) total quiescent current Standby mode; VP = 14.4 V [1] Regulator 1 audio supply: pin REG1; IO = 5 mA unless otherwise specified VO(reg) regulator output voltage 0.5 mA ≤ IO ≤ 400 mA; 10 V < VP < 18 V IB2[D3:D2] = 11 4.75 5.0 5.25 V 50 60 - dB IO = 300 mA - 0.5 0.8 V IO = 400 mA - 0.7 1.2 V 400 700 - mA 100 200 - mA 10 V ≤ VP ≤ 18 V - - 50 mV 5 mA ≤ IO ≤ 400 mA - - 100 mV SVRR supply voltage rejection ratio fripple = 120 Hz; Vripple = 2 V (p-p) Vdo dropout voltage VP = 7 V; IB2[D3:D2] = 01 IO IOS [3] output current VO ≥ 4 V [4] output short-circuit current RL ≤ 0.5 Ω [5] Line regulation ∆VO output voltage variation Load regulation ∆VO output voltage variation TDF8551J_2 Product data sheet © NXP B.V. 2009. All rights reserved. Rev. 02 — 18 August 2009 24 of 47 TDF8551J NXP Semiconductors 4 × 45 W power amplifier with six voltage regulators Table 16. Characteristics …continued Tamb = 25 °C; VDCDC; VP = 14.4 V; RL = 4 Ω; measured in the test circuit Figure 26; unless otherwise specified. Symbol Parameter Conditions Min Typ Max Unit Regulator 2 microprocessor supply: pin REG2; IO = 5 mA unless otherwise specified VO(reg) regulator output voltage 0.5 mA ≤ IO ≤ 350 mA; 10 V ≤ VP ≤ 18 V 3.1 3.3 3.5 V SVRR supply voltage rejection ratio fripple = 120 Hz; Vripple = 2 V (p-p) 40 50 - dB Vdo dropout voltage VBUCAP = 4.75 V - 1.45 2.0 V IO output current VO ≥ 2.8 V [4] 350 1000 - mA output short-circuit current RL ≤ 0.5 Ω [5] 160 300 - mA 50 mV [6][8] IO = 350 mA IOS Line regulation ∆VO output voltage variation 10 V ≤ VP ≤ 18 V - 0.5 mA ≤ IO ≤ 350 mA - - 100 mV 3.1 3.3 3.5 V 50 65 - dB Load regulation ∆VO output voltage variation Regulator 3 mechanical digital supply: pin REG3; IO = 5 mA unless otherwise specified VO(reg) regulator output voltage 0.5 mA ≤ IO ≤ 525 mA; 10 V ≤ VP ≤ 18 V [9] 5 V ≤ VDCDC ≤ 18 V SVRR supply voltage rejection ratio fripple = 120 Hz; Vripple = 2 V (p-p) Vdo dropout voltage VDCDC = 4.75 V; IO = 525 mA output current output short-circuit current IO IOS [2][8] - 1.45 2.0 V VO ≥ 2.8 V [4] 525 900 - mA RL ≤ 0.5 Ω [5] 180 350 - mA 5 V ≤ VDCDC ≤ 18 V - 3 50 mV 0.5 mA ≤ IO ≤ 525 mA - - 100 mV IB2[D7:D5] = 001 4.75 5.0 5.25 V IB2[D7:D5] = 010 5.7 6.0 6.3 V IB2[D7:D5] = 011 6.6 7.0 7.4 V IB2[D7:D5] = 100 8.1 8.6 9.1 V Line regulation ∆VO output voltage variation Load regulation ∆VO output voltage variation Regulator 4 mechanical drive supply: pin REG4; IO = 5 mA unless otherwise specified VO(reg) regulator output voltage 0.5 mA ≤ IO ≤ 800 mA; 10 V ≤ VP ≤ 18 V IB2[D7:D5] = 101 7.6 8.0 8.4 V 50 65 - dB IO = 500 mA - 0.5 0.8 V IO = 800 mA - 0.7 1.2 V 1 1.5 - A 1.5 2 - A SVRR supply voltage rejection ratio fripple = 120 Hz; Vripple = 2 V (p-p) Vdo dropout voltage VP = 7 V; IB2[D7:D5] = 011 IOM IO peak output current T ≤ 3 s; VO = 4 V output current VO ≥ 4 V; T ≤ 100 ms; VP ≥ 11.5 V TDF8551J_2 Product data sheet [3] [4] © NXP B.V. 2009. All rights reserved. Rev. 02 — 18 August 2009 25 of 47 TDF8551J NXP Semiconductors 4 × 45 W power amplifier with six voltage regulators Table 16. Characteristics …continued Tamb = 25 °C; VDCDC; VP = 14.4 V; RL = 4 Ω; measured in the test circuit Figure 26; unless otherwise specified. Symbol IOS Parameter Conditions Min Typ Max Unit output short-circuit current RL ≤ 0.5 Ω 240 400 - mA 10 V ≤ VP ≤ 18 V - 3 50 mV 0.5 mA ≤ IO ≤ 800 mA - - 100 mV 10 V ≤ VP ≤ 18 V; IB1[D7:D4] = 0001 5.7 6.0 6.3 V 10 V ≤ VP ≤ 18 V; IB1[D7:D4] = 0010 6.65 7.0 7.37 V 10 V ≤ VP ≤ 18 V; IB1[D7:D4] = 0011 7.8 8.2 8.6 V 10.5 V ≤ VP ≤ 18 V; IB1[D7:D4] = 0100 8.55 9.0 9.45 V 11 V ≤ VP ≤ 18 V; IB1[D7:D4] = 0101 9.0 9.5 10.0 V 11.5 V ≤ VP ≤ 18 V; IB1[D7:D4] = 0110 9.5 10.0 10.5 V 13 V ≤ VP ≤ 18 V; IB1[D7:D4] = 0111 9.9 10.4 10.9 V 14.2 V ≤ VP ≤ 18 V; IB1[D7:D4] = 1000 11.8 12.5 13.2 V 12.5 V ≤ VP ≤ 18 V; IB1[D7:D4] = 1001 VP − 1 VP − 0.5 - V 10 V ≤ VP ≤ 18 V; IB1[D7:D4] = 1010 4.75 5.0 5.25 V 10 V ≤ VP ≤ 18 V; IB1[D7:D4] = 1011 3.1 3.3 3.5 V 50 60 - dB - 0.5 0.8 V [5] Line regulation ∆VO output voltage variation Load regulation ∆VO output voltage variation Regulator 5 display supply: pin REG5; IO = 5 mA unless otherwise specified VO(reg) regulator output voltage 0.5 mA ≤ IO ≤ 400 mA SVRR supply voltage rejection ratio fripple = 120 Hz; Vripple = 2 V (p-p) Vdo dropout voltage VP = 7 V; IB1[D7:D4] = 0010 [3] IO = 300 mA IO = 400 mA - 0.7 1.2 V 400 900 - mA 150 300 - mA 10 V ≤ VP ≤ 18 V - 3 50 mV 0.5 mA ≤ IO ≤ 400 mA - - 100 mV 4.75 5.0 5.25 V IO output current VO ≥ 2.8 V [4] IOS output short-circuit current RL ≤ 0.5 Ω [5] Line regulation ∆VO output voltage variation Load regulation ∆VO output voltage variation Regulator 6 bus control supply: pin REG6; IO = 5 mA unless otherwise specified VO(reg) regulator output voltage 0.5 mA ≤ IO ≤ 100 mA; 10 V ≤ VP ≤ 18 V TDF8551J_2 Product data sheet © NXP B.V. 2009. All rights reserved. Rev. 02 — 18 August 2009 26 of 47 TDF8551J NXP Semiconductors 4 × 45 W power amplifier with six voltage regulators Table 16. Characteristics …continued Tamb = 25 °C; VDCDC; VP = 14.4 V; RL = 4 Ω; measured in the test circuit Figure 26; unless otherwise specified. Symbol Parameter Conditions Min Typ Max Unit SVRR supply voltage rejection ratio fripple = 120 Hz; Vripple = 2 V (p-p) 40 50 - dB Vdo dropout voltage VP = 4.75 V; IO = 100 mA [3] - 0.4 0.8 V IO output current VO > 4.0 V [4] 150 350 - mA output short-circuit current RL < 0.5 Ω [5] 50 125 - mA 10 V ≤ VP ≤ 18 V - 3 50 mV 0.5 mA ≤ IO ≤ 100 mA - - 100 mV IO = 300 mA - 0.6 0.8 V IO = 400 mA - 0.6 1.1 V IOS Line regulation ∆VO output voltage variation Load regulation ∆VO output voltage variation Power switch 1 antenna: pin SW1 dropout voltage Vdo IO IOS output current VO ≥ 8.5 V [4] 0.5 1 - A output short-circuit current RL ≤ 0.5 Ω [5] - 250 - mA VO = 18 V; VP = 0 V [7] - 25 250 µA - 0.6 0.8 V - 0.6 1.1 V leakage current IL Power switch 2 amplifier: pin SW2 dropout voltage Vdo IO = 300 mA IO = 400 mA IO output current VO ≥ 8.5 V [4] 0.5 1 - A IOS output short-circuit current RL ≤ 0.5 Ω [5] - 250 - mA VO = 18 V; VP = 0 V [7] - 25 250 µA leakage current IL Backup switch Ibu backup current (DC) VBUCAP ≥ 6 V 0.4 1.5 - A VCL clamping voltage VP = 30 V; IO(reg2) = 100 mA - 24 28 V Vdo dropout voltage IO = 500 mA; (VP − VBUCAP) - 0.8 1.2 V [1] The quiescent current is measured in Standby mode when RL = ∞. [2] The dropout voltage of regulator 3 is the voltage difference between VDCDC and VO(reg). [3] The dropout voltage of a regulator is the voltage difference between VP and VO(reg). [4] At current limit, VO(reg) is held constant; see Figure 6. [5] The foldback current protection limits the dissipation power at short-circuit; see Figure 6. [6] The dropout voltage of regulator 2 is the voltage difference between VBUCAP and VO(reg). [7] Unbiased switch-supply IL is measured in supply line VP. [8] Regulator output still in regulation at applied test voltage, therefore the actual dropout voltage can not be measured. [9] The current capability of regulator 3 is sufficient to drive NXP Semiconductors’ DSP devices SAF7730, SAF7740 or SAF7741. TDF8551J_2 Product data sheet © NXP B.V. 2009. All rights reserved. Rev. 02 — 18 August 2009 27 of 47 xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx x x x xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxx xx xx xxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxx xxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxx x x xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxx xxx NXP Semiconductors TDF8551J_2 Product data sheet VP DIAG VREG3 Regulator switched off when amplifier is completely muted Rev. 02 — 18 August 2009 Amplifier status DB2[D7] IB1[D0] IB2[D4] twake SVR td(mute-off) Soft mute Soft mute 28 of 47 © NXP B.V. 2009. All rights reserved. 001aak093 Fig 12. Start-up and shutdown timing TDF8551J Amplifier output 4 × 45 W power amplifier with six voltage regulators STB TDF8551J NXP Semiconductors 4 × 45 W power amplifier with six voltage regulators VO (V) Headroom protection activated: 1) fast mute 2) discharge of SVR VP 14.4 Low VP mute activated 8.8 Output voltage Headroom voltage 8.6 7.2 Low VP mute released SVR voltage 3.5 DIAG DB2[D7] VREG3 001aak094 Fig 13. Low supply voltage behavior at VP > 5.5 V TDF8551J_2 Product data sheet © NXP B.V. 2009. All rights reserved. Rev. 02 — 18 August 2009 29 of 47 TDF8551J NXP Semiconductors 4 × 45 W power amplifier with six voltage regulators VO (V) VP 14.4 Low VP mute activated POR activated 8.8 8.6 7.2 5.5 3.5 SVR voltage DIAG POR has occurred DB2[D7] VREG3 001aak095 Fig 14. Low supply voltage behavior at VP < 5.5 V TDF8551J_2 Product data sheet © NXP B.V. 2009. All rights reserved. Rev. 02 — 18 August 2009 30 of 47 TDF8551J NXP Semiconductors 4 × 45 W power amplifier with six voltage regulators mrc339 102 THD (%) 10 1 (1) 10−1 (2) 10−2 (3) (4) 10−3 10−2 10−1 1 102 10 Po (W) (1) f = 10 kHz (channels 1 to 4). (2) f = 100 Hz and 1 kHz (channels 1 and 2). (3) f = 1 kHz (channels 3 and 4). (4) f = 100 Hz (channels 3 and 4). VP = 14.4 V. RL = 4 Ω. Fig 15. Total harmonic distortion as a function of output power mrc344 10 THD (%) 1 10−1 10−2 (1) (2) 10−3 10−2 10−1 1 102 10 f (kHz) (1) Po = 1 W. (2) Po = 10 W. VP = 14.4 V. RL = 4 Ω. Fig 16. Total harmonic distortion as a function of frequency TDF8551J_2 Product data sheet © NXP B.V. 2009. All rights reserved. Rev. 02 — 18 August 2009 31 of 47 TDF8551J NXP Semiconductors 4 × 45 W power amplifier with six voltage regulators mrc337 1 THD (%) 10−1 10−2 10−3 10−1 1 102 10 Vo(rms) (V) VP = 14.4 V. RL = 600 Ω. f = 1 kHz. Fig 17. Total harmonic distortion as a function of output voltage in balanced line driver mode mrc346 30 Po (W) (1) 25 (2) 20 15 10−2 (3) 10−1 1 102 10 f (kHz) VP = 14.4 V; RL = 4 Ω (1) THD = 10 %. (2) THD = 5 %. (3) THD = 0.5 %. Fig 18. Output power as a function of frequency TDF8551J_2 Product data sheet © NXP B.V. 2009. All rights reserved. Rev. 02 — 18 August 2009 32 of 47 TDF8551J NXP Semiconductors 4 × 45 W power amplifier with six voltage regulators mrc347 45 (1) Po (W) 40 (2) 35 (3) 30 25 10−2 10−1 1 102 10 f (kHz) VP = 14.4 V; RL = 2 Ω (1) THD = 10 %. (2) THD = 5 %. (3) THD = 0.5 %. Fig 19. Output power as a function of frequency 001aaj118 100 Po (W) 80 60 (1) 40 (2) (3) 20 0 8 10 12 14 16 18 20 VP (V) f = 1 kHz; RL = 4 Ω (1) Maximum power. (2) THD = 10 %. (3) THD = 0.5 %. Fig 20. Output power as a function of supply voltage TDF8551J_2 Product data sheet © NXP B.V. 2009. All rights reserved. Rev. 02 — 18 August 2009 33 of 47 TDF8551J NXP Semiconductors 4 × 45 W power amplifier with six voltage regulators mrc334 100 Po (W) 80 (1) 60 (2) 40 (3) 20 0 8 10 12 14 16 18 20 Vp (V) f = 1 kHz; RL = 2 Ω (1) Maximum power. (2) THD = 10 %. (3) THD = 0.5 %. Fig 21. Output power as a function of supply voltage mrc341 84 SVRR (dB) (1) 76 (2) 68 60 10−1 1 10 f (kHz) (1) Operating mode. (2) Mute mode. VP = 14.4 V. RL = 4 Ω. Vripple = 2 V (p-p). Rs = 600 Ω. Fig 22. Supply voltage rejection ratio as a function of frequency TDF8551J_2 Product data sheet © NXP B.V. 2009. All rights reserved. Rev. 02 — 18 August 2009 34 of 47 TDF8551J NXP Semiconductors 4 × 45 W power amplifier with six voltage regulators mrc338 100 αcs (dB) 90 80 70 60 50 10−2 10−1 1 102 10 f (kHz) VP = 14.4 V. RL = 4 Ω. Po = 4 W. Rs = 600 Ω. Fig 23. Channel separation mrc342 50 Ptot (W) 40 30 20 10 0 0 10 20 30 Po (W) VP = 14.4 V. RL = 4 Ω. f = 1 kHz. Fig 24. Amplifier power dissipation as a function of output power; all channels driven TDF8551J_2 Product data sheet © NXP B.V. 2009. All rights reserved. Rev. 02 — 18 August 2009 35 of 47 TDF8551J NXP Semiconductors 4 × 45 W power amplifier with six voltage regulators mrc343 100 η (%) 80 60 40 20 0 0 8 16 24 32 40 Po (W) VP = 14.4 V. RL = 4 Ω. f = 1 kHz. Fig 25. Amplifier efficiency as a function of output power; all channels driven TDF8551J_2 Product data sheet © NXP B.V. 2009. All rights reserved. Rev. 02 — 18 August 2009 36 of 47 TDF8551J NXP Semiconductors 4 × 45 W power amplifier with six voltage regulators 12. Application information 28 REG6 REGULATOR 6 bus controller 10 µF (50 V) BUCAP 37 REG2 REGULATOR 2 1000 µF (16 V) 36 220 nF VP 220 µF (16 V) 35 100 nF TEMPERATURE AND LOAD DUMP PROTECTION VOLTAGE REGULATOR REFERENCE VOLTAGE 30 REG1 REGULATOR 1 audio 10 µF (50 V) 220 nF VDCDC 14.4 V/5 V microcontroller 10 µF (50 V) BACKUP SWITCH 14.4 V 100 nF mechanical digital 31 REG3 REGULATOR 3 26 100 nF 10 µF (50 V) (1) ENABLE LOGIC 100 nF mechanical drive 33 REG4 REGULATOR 4 10 µF (50 V) 100 nF 34 REG5 REGULATOR 5 display 10 µF (50 V) SWITCH 1 100 nF 29 SW1 amplifiers 10 µF (50 V) SWITCH 2 100 nF 27 SW2 aerial motor 10 µF (50 V) SDA SCL STB 32 GND 20 VP1 2 25 DIAG I2C-BUS INTERFACE STANDBY/MUTE 14.4 V 6 VP2 TDF8551J 4 22 100 nF CLIP DETECT/DIAGNOSTIC 10 kΩ 220 nF (1) 220 nF 2200 µF (16 V) microcontroller Rs IN1 MUTE 11 26 dB/ 20 dB 470 nF 9 OUT1+ 7 OUT1− 17 OUT2+ 19 OUT2− 5 OUT3+ 3 OUT3− 21 OUT4+ 23 OUT4− PROTECTION/ DIAGNOSTIC Rs IN2 MUTE 15 26 dB/ 20 dB 470 nF PROTECTION/ DIAGNOSTIC Rs IN3 MUTE 12 26 dB/ 20 dB 470 nF PROTECTION/ DIAGNOSTIC Rs IN4 470 nF MUTE 14 26 dB/ 20 dB VP PROTECTION/ DIAGNOSTIC TEMPERATURE AND LOAD DUMP PROTECTION AMPLIFIER 22 µF 10 13 SVR SGND 2.2 µF (4 × 470 nF) 16 8 ACGND PGND1 PGND2/TAB PGND3 PGND4 1 18 24 001aaj104 (1) See Section 12.1. The value of ACGND capacitor must be close to 4 × the value of capacitor connected to the positive input of each channel; for EMC reasons a 10 nF capacitor can be connected between each amplifier output and ground. Fig 26. Test and application diagram of TDF8551J TDF8551J_2 Product data sheet © NXP B.V. 2009. All rights reserved. Rev. 02 — 18 August 2009 37 of 47 TDF8551J NXP Semiconductors 4 × 45 W power amplifier with six voltage regulators 12.1 Supply decoupling See Figure 26 to Figure 30. The high frequency 220 nF decoupling capacitors connected to power supply voltage pins 6 and 20 should be located as close as possible to these pins. It is important to use good quality capacitors. These capacitors should be able to suppress high voltage peaks that can occur on the power supply if several audio channels are accidentally shorted to the power supply simultaneously, due to the activation of current protection. Good results have been achieved using 0805 case-size capacitors (X7R material, 220 nF) located close to power supply voltage pins 6 and 20. If a DC-to-DC converter is used to supply regulator 3, the recommendations of the converter manufacturer relating to decoupling must be followed. TDF8551J_2 Product data sheet © NXP B.V. 2009. All rights reserved. Rev. 02 — 18 August 2009 38 of 47 TDF8551J NXP Semiconductors 4 × 45 W power amplifier with six voltage regulators 001aai763 Fig 27. Printed-circuit board layout of test and application circuit showing top copper layer viewed from top 001aai762 Fig 28. Printed-circuit board layout of test and application circuit showing bottom copper layer viewed from top TDF8551J_2 Product data sheet © NXP B.V. 2009. All rights reserved. Rev. 02 — 18 August 2009 39 of 47 TDF8551J NXP Semiconductors 4 × 45 W power amplifier with six voltage regulators 001aai764 Fig 29. Printed-circuit board layout of test and application circuit showing components and top copper layout viewed from top 001aai765 Fig 30. Printed-circuit board layout of test and application circuit showing components and bottom copper layout viewed from top TDF8551J_2 Product data sheet © NXP B.V. 2009. All rights reserved. Rev. 02 — 18 August 2009 40 of 47 TDF8551J NXP Semiconductors 4 × 45 W power amplifier with six voltage regulators 12.2 Beep input circuit Beep input circuit to amplify the beep signal from the microcontroller to all 4 amplifiers (gain = 0 dB). Note that this circuit will not affect amplifier performance. TDF8551J ACGND 2.2 µF From microcontroller 1.7 kΩ 0.22 µF 100 Ω 47 pF 001aaj150 Fig 31. Application diagram for beep input 12.3 Noise The outputs of regulators 1 to 6 are designed to give very low noise with good stability. The noise output voltage depends on output capacitor Co. Table 17 shows the effect of the output capacitor on the noise figure. Table 17. Regulator Regulator noise figures Noise figure (µV) [1] Co = 10 µF Co = 47 µF Co = 100 µF 1 225 180 145 2 700 600 390 3 100 85 65 4 235 205 175 5 315 285 225 6 710 550 340 [1] Measured in the frequency range 20 Hz to 80 kHz; at IO(reg) = 10 mA. 12.4 Stability The regulators are made stable by connecting capacitors to the regulator outputs. The stability can be guaranteed with almost any output capacitor if its Equivalent Series Resistance (ESR) stays below the ESR curve shown in Figure 32. If an electrolytic capacitor is used, its behavior with temperature can cause oscillations at extremely low temperature. Oscillation problems can be avoided by adding a 47 nF capacitor in parallel with the electrolytic capacitor. The following example describes how to select the value of output capacitor. TDF8551J_2 Product data sheet © NXP B.V. 2009. All rights reserved. Rev. 02 — 18 August 2009 41 of 47 TDF8551J NXP Semiconductors 4 × 45 W power amplifier with six voltage regulators 12.4.1 Example regulator 2 Regulator 2 is stabilized with an electrolytic output capacitor of 10 µF which has an ESR of 4 Ω. At Tamb = −30 °C the capacitor value decreases to 3 µF and its ESR increases to 28 Ω which is above the maximum allowed as shown in Figure 32, and which will make the regulator unstable. To avoid problems with stability at low temperatures, the recommended solution is to use tantalum capacitors. Either use a tantalum capacitor of 10 µF, or an electrolytic capacitor with a higher value. 20 ESR (Ω) 15 maximum ESR 10 5 stable region 0 0.1 1 10 C (µF) 100 mgl912 Fig 32. Curve for selecting the value of output capacitors for regulators 1 to 6 TDF8551J_2 Product data sheet © NXP B.V. 2009. All rights reserved. Rev. 02 — 18 August 2009 42 of 47 TDF8551J NXP Semiconductors 4 × 45 W power amplifier with six voltage regulators 13. Package outline DBS37P: plastic DIL-bent-SIL power package; 37 leads (lead length 6.8 mm) SOT725-1 non-concave Dh x D Eh view B: mounting base side A2 d B j E A L4 L3 L 1 L2 37 e1 Z w M bp e c Q v M e2 m 0 10 20 mm scale DIMENSIONS (mm are the original dimensions) UNIT A A2 mm 19 4.65 0.60 4.35 0.45 bp c 0.5 0.3 D(1) d 42.2 37.8 41.7 37.4 Dh E(1) e e1 e2 Eh j L L2 12 15.9 15.5 2 1 4 8 3.4 3.1 6.8 3.9 3.1 L3 L4 1.15 22.9 0.85 22.1 m Q v 4 2.1 1.8 0.6 w x 0.25 0.03 Z(1) 3.30 2.65 Note 1. Plastic or metal protrusions of 0.25 mm maximum per side are not included. REFERENCES OUTLINE VERSION IEC JEDEC JEITA SOT725-1 --- --- --- EUROPEAN PROJECTION ISSUE DATE 01-11-14 02-11-22 Fig 33. Package outline SOT725-1 (DBS37P) TDF8551J_2 Product data sheet © NXP B.V. 2009. All rights reserved. Rev. 02 — 18 August 2009 43 of 47 TDF8551J NXP Semiconductors 4 × 45 W power amplifier with six voltage regulators 14. Soldering of through-hole mount packages 14.1 Introduction to soldering through-hole mount packages This text gives a very brief insight into wave, dip and manual soldering. Wave soldering is the preferred method for mounting of through-hole mount IC packages on a printed-circuit board. 14.2 Soldering by dipping or by solder wave Driven by legislation and environmental forces the worldwide use of lead-free solder pastes is increasing. Typical dwell time of the leads in the wave ranges from 3 seconds to 4 seconds at 250 °C or 265 °C, depending on solder material applied, SnPb or Pb-free respectively. The total contact time of successive solder waves must not exceed 5 seconds. The device may be mounted up to the seating plane, but the temperature of the plastic body must not exceed the specified maximum storage temperature (Tstg(max)). If the printed-circuit board has been pre-heated, forced cooling may be necessary immediately after soldering to keep the temperature within the permissible limit. 14.3 Manual soldering Apply the soldering iron (24 V or less) to the lead(s) of the package, either below the seating plane or not more than 2 mm above it. If the temperature of the soldering iron bit is less than 300 °C it may remain in contact for up to 10 seconds. If the bit temperature is between 300 °C and 400 °C, contact may be up to 5 seconds. 14.4 Package related soldering information Table 18. Suitability of through-hole mount IC packages for dipping and wave soldering Package Soldering method Dipping Wave CPGA, HCPGA - suitable DBS, DIP, HDIP, RDBS, SDIP, SIL suitable suitable[1] PMFP[2] - not suitable [1] For SDIP packages, the longitudinal axis must be parallel to the transport direction of the printed-circuit board. [2] For PMFP packages hot bar soldering or manual soldering is suitable. TDF8551J_2 Product data sheet © NXP B.V. 2009. All rights reserved. Rev. 02 — 18 August 2009 44 of 47 TDF8551J NXP Semiconductors 4 × 45 W power amplifier with six voltage regulators 15. Abbreviations Table 19. Abbreviations Acronym Description BCDMOS Bipolar Complementary Double-diffused Metal-Oxide Semiconductor DSP Digital Signal Processor EMC ElectroMagnetic Compatibility LSB Least Significant Bit MSB Most Significant Bit POR Power-On Reset 16. Revision history Table 20. Revision history Document ID Release date Data sheet status Change notice Supersedes TDF8551J_2 20090818 Product data sheet - TDF8551J_1 Modifications: TDF8551J_1 • Table 16 “Characteristics” changed minimum output current (IO) regulator 3 pin REG3. 20081202 Preliminary data sheet TDF8551J_2 Product data sheet - - © NXP B.V. 2009. All rights reserved. Rev. 02 — 18 August 2009 45 of 47 TDF8551J NXP Semiconductors 4 × 45 W power amplifier with six voltage regulators 17. Legal information 17.1 Data sheet status Document status[1][2] Product status[3] Definition Objective [short] data sheet Development This document contains data from the objective specification for product development. Preliminary [short] data sheet Qualification This document contains data from the preliminary specification. Product [short] data sheet Production This document contains the product specification. [1] Please consult the most recently issued document before initiating or completing a design. [2] The term ‘short data sheet’ is explained in section “Definitions”. [3] The product status of device(s) described in this document may have changed since this document was published and may differ in case of multiple devices. The latest product status information is available on the Internet at URL http://www.nxp.com. 17.2 Definitions Draft — The document is a draft version only. The content is still under internal review and subject to formal approval, which may result in modifications or additions. NXP Semiconductors does not give any representations or warranties as to the accuracy or completeness of information included herein and shall have no liability for the consequences of use of such information. Short data sheet — A short data sheet is an extract from a full data sheet with the same product type number(s) and title. A short data sheet is intended for quick reference only and should not be relied upon to contain detailed and full information. For detailed and full information see the relevant full data sheet, which is available on request via the local NXP Semiconductors sales office. In case of any inconsistency or conflict with the short data sheet, the full data sheet shall prevail. 17.3 Disclaimers General — Information in this document is believed to be accurate and reliable. However, NXP Semiconductors does not give any representations or warranties, expressed or implied, as to the accuracy or completeness of such information and shall have no liability for the consequences of use of such information. Right to make changes — NXP Semiconductors reserves the right to make changes to information published in this document, including without limitation specifications and product descriptions, at any time and without notice. This document supersedes and replaces all information supplied prior to the publication hereof. Suitability for use — NXP Semiconductors products are not designed, authorized or warranted to be suitable for use in medical, military, aircraft, space or life support equipment, nor in applications where failure or malfunction of an NXP Semiconductors product can reasonably be expected to result in personal injury, death or severe property or environmental damage. NXP Semiconductors accepts no liability for inclusion and/or use of NXP Semiconductors products in such equipment or applications and therefore such inclusion and/or use is at the customer’s own risk. Applications — Applications that are described herein for any of these products are for illustrative purposes only. NXP Semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification. Limiting values — Stress above one or more limiting values (as defined in the Absolute Maximum Ratings System of IEC 60134) may cause permanent damage to the device. Limiting values are stress ratings only and operation of the device at these or any other conditions above those given in the Characteristics sections of this document is not implied. Exposure to limiting values for extended periods may affect device reliability. Terms and conditions of sale — NXP Semiconductors products are sold subject to the general terms and conditions of commercial sale, as published at http://www.nxp.com/profile/terms, including those pertaining to warranty, intellectual property rights infringement and limitation of liability, unless explicitly otherwise agreed to in writing by NXP Semiconductors. In case of any inconsistency or conflict between information in this document and such terms and conditions, the latter will prevail. No offer to sell or license — Nothing in this document may be interpreted or construed as an offer to sell products that is open for acceptance or the grant, conveyance or implication of any license under any copyrights, patents or other industrial or intellectual property rights. Export control — This document as well as the item(s) described herein may be subject to export control regulations. Export might require a prior authorization from national authorities. Quick reference data — The Quick reference data is an extract of the product data given in the Limiting values and Characteristics sections of this document, and as such is not complete, exhaustive or legally binding. 17.4 Trademarks Notice: All referenced brands, product names, service names and trademarks are the property of their respective owners. I2C-bus — logo is a trademark of NXP B.V. 18. Contact information For more information, please visit: http://www.nxp.com For sales office addresses, please send an email to: [email protected] TDF8551J_2 Product data sheet © NXP B.V. 2009. All rights reserved. Rev. 02 — 18 August 2009 46 of 47 TDF8551J NXP Semiconductors 4 × 45 W power amplifier with six voltage regulators 19. Contents 1 1.1 1.2 2 3 4 5 6 7 7.1 7.2 8 8.1 8.2 8.3 8.4 8.5 8.5.1 8.5.2 8.5.3 8.5.4 8.5.5 8.5.6 8.5.7 8.5.7.1 8.5.7.2 8.5.7.3 8.5.8 8.6 8.6.1 8.6.2 8.6.3 8.6.4 8.6.5 8.6.6 8.6.7 8.7 9 10 10.1 11 12 12.1 12.2 12.3 12.4 General description . . . . . . . . . . . . . . . . . . . . . . 1 Amplifiers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Voltage regulators and switches . . . . . . . . . . . . 1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Quick reference data . . . . . . . . . . . . . . . . . . . . . 2 Ordering information . . . . . . . . . . . . . . . . . . . . . 4 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Pinning information . . . . . . . . . . . . . . . . . . . . . . 6 Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 7 Functional description . . . . . . . . . . . . . . . . . . . 8 Start-up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Start-up and shutdown timing. . . . . . . . . . . . . . 8 Power-on reset and supply voltage spikes . . . . 8 Diagnostic output . . . . . . . . . . . . . . . . . . . . . . . 8 Amplifiers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Muting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Temperature protection. . . . . . . . . . . . . . . . . . . 9 Offset detection. . . . . . . . . . . . . . . . . . . . . . . . . 9 Speaker protection . . . . . . . . . . . . . . . . . . . . . . 9 Line driver mode . . . . . . . . . . . . . . . . . . . . . . . . 9 Input and AC ground capacitor values . . . . . . . 9 Load detection . . . . . . . . . . . . . . . . . . . . . . . . 10 DC load detection . . . . . . . . . . . . . . . . . . . . . . 10 AC load detection . . . . . . . . . . . . . . . . . . . . . . 10 Load detection procedure . . . . . . . . . . . . . . . . 11 Low headroom protection . . . . . . . . . . . . . . . . 11 Voltage regulators and switches . . . . . . . . . . . 11 Standby regulator outputs. . . . . . . . . . . . . . . . 12 Backup capacitor . . . . . . . . . . . . . . . . . . . . . . 12 Backup function . . . . . . . . . . . . . . . . . . . . . . . 12 Power switches . . . . . . . . . . . . . . . . . . . . . . . . 13 External DC-to-DC converter . . . . . . . . . . . . . 13 Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Temperature protection. . . . . . . . . . . . . . . . . . 13 I2C-bus specification . . . . . . . . . . . . . . . . . . . . 14 Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . 20 Thermal characteristics. . . . . . . . . . . . . . . . . . 21 Quality specification . . . . . . . . . . . . . . . . . . . . 21 Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . 22 Application information. . . . . . . . . . . . . . . . . . 37 Supply decoupling . . . . . . . . . . . . . . . . . . . . . 38 Beep input circuit . . . . . . . . . . . . . . . . . . . . . . 41 Noise. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 Stability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 12.4.1 Example regulator 2 . . . . . . . . . . . . . . . . . . . . 13 Package outline . . . . . . . . . . . . . . . . . . . . . . . . 14 Soldering of through-hole mount packages . 14.1 Introduction to soldering through-hole mount packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14.2 Soldering by dipping or by solder wave . . . . . 14.3 Manual soldering . . . . . . . . . . . . . . . . . . . . . . 14.4 Package related soldering information . . . . . . 15 Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . 16 Revision history . . . . . . . . . . . . . . . . . . . . . . . 17 Legal information . . . . . . . . . . . . . . . . . . . . . . 17.1 Data sheet status . . . . . . . . . . . . . . . . . . . . . . 17.2 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . 17.3 Disclaimers. . . . . . . . . . . . . . . . . . . . . . . . . . . 17.4 Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Contact information . . . . . . . . . . . . . . . . . . . . 19 Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 43 44 44 44 44 44 45 45 46 46 46 46 46 46 47 Please be aware that important notices concerning this document and the product(s) described herein, have been included in section ‘Legal information’. © NXP B.V. 2009. All rights reserved. For more information, please visit: http://www.nxp.com For sales office addresses, please send an email to: [email protected] Date of release: 18 August 2009 Document identifier: TDF8551J_2