TFA9815 Stereo full-bridge audio amplifier 2 x 17 W Rev. 01 — 16 December 2008 Preliminary data sheet 1. General description The TFA9815 is a 2-channel power comparator for high-efficiency class D audio amplifier systems. It contains two full-bridge Bridge-Tied Load (BTL) power stages, drive logic, protection control logic and full differential input comparators. By using this power comparator a compact closed-loop self-oscillating digital audio amplifier system or open-loop system can be built. The continuous output power is 2 ×17 W in a full-bridge BTL application. The TFA9815 does not require a heat sink and operates using an asymmetrical supply voltage. 2. Features n n n n n n Stereo full-bridge audio amplifier for class D applications No external heat sink required Operating voltage range: asymmetrical from 8 V to 20 V Thermally protected Zero dead-time switching Current-limiting (no audible interruptions) 3. Applications n n n n n n Self-oscillating or open-loop class D audio amplifier applications Flat-panel television sets Flat-panel monitors Multimedia systems Wireless speakers High-end CRT television sets 4. Quick reference data Table 1. Quick reference data VP = 12 V; fosc = 550 kHz; Tamb = 25 °C; typical application diagram Figure 12, unless otherwise specified. Symbol Parameter Conditions Min Typ Max Unit VP supply voltage single, asymmetrical supply (VDD - VSS) 8 12 20 V IP supply current Sleep mode - 110 200 µA General TFA9815 NXP Semiconductors Audio amplifier 2 x 17 W Table 1. Quick reference data …continued VP = 12 V; fosc = 550 kHz; Tamb = 25 °C; typical application diagram Figure 12, unless otherwise specified. Symbol Parameter Conditions Min Typ Max Unit Iq(tot) total quiescent current Operating mode; no load; no snubbers; no filter connected - 40 50 mA ηpo output power efficiency output power; 2 × 10 W into 8 Ω 89 91 - % Po(RMS) RMS output power VP = 15 V; RL = 8 Ω; THD = 10 % 15 16 - W VP = 12 V; RL = 8 Ω; THD = 10 % 9 10 - W VP = 12 V; RL = 6 Ω; THD = 10 % 12 13 - W VP = 12 V; RL = 4 Ω; THD = 10 % 17 18 - W 5. Ordering information Table 2. Ordering information Type number TFA9815T Package Name Description Version SO32 plastic small outline package; 32 leads; body width 7.5 mm SOT287-1 TFA9815_1 Preliminary data sheet © NXP B.V. 2008. All rights reserved. Rev. 01 — 16 December 2008 2 of 26 TFA9815 NXP Semiconductors Audio amplifier 2 x 17 W 6. Block diagram TFA9815 27 BOOT1P 25 VDDP1 DRIVER HIGH 26 OUT1P CONTROL LOGIC VDDA1 4 DRIVER LOW 30 VSSP1 IN1P 2 COMPARATOR 1 IN1N 3 STAB1 VSSA1 5 29 BOOT1N VDDP1 DRIVER HIGH DIAG 10 PROTECTION OVP UVP OCP OTP ODP WP 28 OUT1N CONTROL LOGIC DRIVER LOW VSSP1 31 STAB1 CDELAY 8 SO/OL 6 22 BOOT2P TEST 11 MANAGER 24 VDDP2 ENABLE 7 STAB1 DRIVER HIGH REFERENCE STAB2 23 OUT2P CONTROL LOGIC DRIVER LOW VDDA2 13 19 VSSP2 IN2P 15 IN2N 14 STAB2 COMPARATOR 2 20 BOOT2N VDDP2 VSSA2 12 DRIVER HIGH 21 OUT2N CONTROL LOGIC DRIVER LOW VSSP2 18 STAB2 HEATSPREADER 1 16 17 32 VSSD(HW) Fig 1. 9 n.c. 010aaa211 TFA9815 block diagram TFA9815_1 Preliminary data sheet © NXP B.V. 2008. All rights reserved. Rev. 01 — 16 December 2008 3 of 26 TFA9815 NXP Semiconductors Audio amplifier 2 x 17 W 7. Pinning information 7.1 Pinning VSSD(HW) 1 IN1P 2 32 VSSD(HW) 31 STAB1 IN1N 3 VDDA1 4 30 VSSP1 29 BOOT1N VSSA1 5 28 OUT1N SO/OL 6 27 BOOT1P ENABLE 7 26 OUT1P CDELAY 8 NC 9 TFA9815 SO32 25 VDDP1 24 VDDP2 DIAG 10 23 OUT2P TEST 11 22 BOOT2P VSSA2 12 21 OUT2N VDDA2 13 20 BOOT2N IN2N 14 19 VSSP2 18 STAB2 IN2P 15 17 VSSD(HW) VSSD(HW) 16 010aaa212 Fig 2. Pin configuration The SO32 package has four corner leads. These leads (1, 16, 17 and 32) are internally connected to the die pad and must be connected to VSSA. Together with the applied copper area on the PCB these leads determine the ambient temperature, which affects the thermal resistance of the junction. 7.2 Pin description Table 3. Pin description Symbol Pin Description VSSD(HW) 1 negative digital supply voltage and handle-wafer connection IN1P 2 positive input comparator channel 1 IN1N 3 negative input comparator channel 1 VDDA1 4 positive analog supply voltage channel 1 VSSA1 5 negative analog supply voltage channel 1 SO/OL 6 self-oscillating / open-loop configuration enable ENABLE 7 enable input to switch between Sleep and Operating mode CDELAY 8 switch on/off timing control n.c. 9 not connected DIAG 10 diagnostic output; open-drain TEST 11 test signal input; for testing purposes only VSSA2 12 negative analog supply voltage channel 2 VDDA2 13 positive analog supply voltage channel 2 IN2N 14 negative input comparator channel 2 TFA9815_1 Preliminary data sheet © NXP B.V. 2008. All rights reserved. Rev. 01 — 16 December 2008 4 of 26 TFA9815 NXP Semiconductors Audio amplifier 2 x 17 W Table 3. Pin description …continued Symbol Pin Description IN2P 15 positive input comparator channel 2 VSSD(HW) 16 negative digital supply voltage and handle-wafer connection VSSD(HW) 17 negative digital supply voltage and handle-wafer connection STAB2 18 decoupling of internal 11 V regulator for channel 2 drivers VSSP2 19 negative power supply voltage channel 2 BOOT2N 20 bootstrap high-side driver negative output channel 2 OUT2N 21 negative output channel 2 BOOT2P 22 bootstrap high-side driver positive output channel 2 OUT2P 23 positive output channel 2 VDDP2 24 positive power supply voltage channel 2 VDDP1 25 positive power supply voltage channel 1 OUT1P 26 positive output channel 1 BOOT1P 27 bootstrap high-side driver positive output channel 1 OUT1N 28 negative output channel 1 BOOT1N 29 bootstrap high-side driver negative output channel 1 VSSP1 30 negative power supply voltage channel 1 STAB1 31 decoupling of internal 11 V regulator for channel 1 drivers VSSD(HW) 32 negative digital supply voltage and handle-wafer connection 8. Functional description 8.1 General The TFA9815 is a dual-switching power comparator. It is the main building block for a stereo high-efficiency Class D audio power amplifier system. It contains two full-bridge BTL power stages, drive logic, protection control logic and full differential input comparators and references (see Figure 1). By using this power comparator a compact closed-loop self-oscillating digital amplifier system or open-loop system can be built. A second-order low-pass filter converts the PWM output signal into an analog audio signal across the speaker. 8.2 Interfacing The pins ENABLE and SO/OL control the Operating mode of the TFA9815. Both the ENABLE and the SO/OL pins are referenced to VSSD(HW). When the SO/OL pin is connected to VSSD(HW) the TFA9815 is in self-oscillating configuration: when the SO/OL pin is floating the TFA9815 is in open-loop configuration. Under this latter condition the open-pin voltage is typically 4 V applied internally. The TEST pin needs to be connected to ground in both situations. TFA9815_1 Preliminary data sheet © NXP B.V. 2008. All rights reserved. Rev. 01 — 16 December 2008 5 of 26 TFA9815 NXP Semiconductors Audio amplifier 2 x 17 W Table 4. SO/OL connections Interfacing SO/OL connected to: Configuration VSSD(HW) Self-oscillating Open Open-loop The device has two modes: Sleep and Operating. In Sleep mode the TFA9815 is not biased and has a very low supply current. Sleep mode can also be used to quickly mute the device. When the TFA9815 is set into Operating mode the device is started via the start-up sequence, which provides a pop-free start-up behavior. After start-up the STABn reference voltages are present and the outputs start switching. Table 5. Start-up Interfacing ENABLE (V) Mode ENABLE < 0.8 V Sleep mode ENABLE > 3 V Operating mode 8.3 Input comparators The input stages have a differential input and are optimized for low noise and offset. This results in maximum flexibility in the application. Operating in self-oscillating configuration the inputs (IN1P, IN1N, IN2P, IN2N) of the comparators are internally set to a voltage level of VP, but only during the start-up sequence. In Operating mode the inputs are high-ohmic. Operating in open-loop configuration, no internal voltages are applied to the inputs. The input pins (IN1P, IN1N, IN2P, IN2N) are pulled down to VSSA1 and VSSA2 level by internal resistors. 8.4 Diagnostic The DIAG output is an open-drain output. The maximum current is 2 mA. When one of the protections is activated the DIAG output is set LOW. The DIAG output refers to VSSD. Protection Active t DIAG High Amplifier restart LOW t 5 µs Fig 3. Timing diagram TFA9815_1 Preliminary data sheet 010aaa377 © NXP B.V. 2008. All rights reserved. Rev. 01 — 16 December 2008 6 of 26 TFA9815 NXP Semiconductors Audio amplifier 2 x 17 W 8.5 Protections The TFA9815 has the following protections: • • • • • • OverTemperature Protection (OTP) OverCurrent Protection (OCP) OverVoltage Protection (OVP) UnderVoltage Protection (UVP) OverDissipation Protection (ODP) Window Protection (WP) When either the OTP or the OCP are activated the output power stage is switched off and all the outputs (OUT1N, OUT1P, OUT2N and OUT2P) become floating. The power stage will switch back on after 5 µs or as soon as the fault condition is removed. When any other protection is activated (OVP, UVP, ODP, or WP) all the outputs become floating and the device shuts down. The TFA9815 will resume operating after the fault condition has been removed, going through the restart sequence shown in Figure 3. Restarting will typically take 500 ms, depending on the power-supply voltage level. • Overtemperature protection If the junction temperature (Tj) exceeds a threshold level of about 150 °C the outputs become floating. The device will start switching again after 5 ms and when the temperature is below 150 °C. This thermal limitation is without audible interruptions. • Overcurrent protection If the output current exceeds the maximum output-current threshold level the outputs become floating. The device will start switching again after 5 µs. This current limitation is without audible interruptions. • Overvoltage protection If the supply voltage applied to the TFA9815 exceeds the maximum supply-voltage threshold level the device shuts down. The device will resume operating when the supply is within the operating range, going through the restart sequence. • Undervoltage protection If the supply voltage applied to the TFA9815 falls below the minimum supply-voltage threshold level the device shuts down. The device will resume operating when the supply is within the operating range, going through the restart sequence. • Overdissipation protection If the junction temperature (Tj) exceeds 135 °C an internal OverTemperature Warning (OTW) signal is generated. If the overcurrent protection is generated while the OTW is active the device will shut down and resume operating automatically, going through the restart sequence. • Window protection During start-up, if one of the outputs is shorted to VSS or VDD the device will interrupt the start-up sequence and wait until the short is removed. This is an effective measure to protect the device against shorts between the outputs (before the filter) and the ground or supply lines. The WP protects the device against errors made during board assembly. TFA9815_1 Preliminary data sheet © NXP B.V. 2008. All rights reserved. Rev. 01 — 16 December 2008 7 of 26 TFA9815 NXP Semiconductors Audio amplifier 2 x 17 W Table 6. Overview protections Protections Symbol Condition Diag. Outputs Recovering OTP Tj > 150 °C LOW Floating Automatic, after 5 µs and Tj < 150 °C OCP IO > IORM LOW Floating Automatic, after 5 µs OVP VP > 20 V LOW Floating Switch-off to restart when VP < 20 V UVP VP < 8 V LOW Floating Switch-off to restart when VP > 8 V ODP Tj > 135 °C and IO > IORM LOW Floating WP OUTX > VDDA − 1 V or OUTX < VSSA + 1 V LOW Switch-off to restart Start-up after removing fault condition 8.6 Timing diagram VP ENABLE STAB1 CDELAY V IN x FLOATING FLOATING PWM PWM AUDIO AUDIO OUT x AUDIO DIAG SLEEP START-UP OPERATING FAULT RESTART OPERATING SHUT-DOWN SLEEP 010aaa378 Fig 4. Start-up sequence TFA9815_1 Preliminary data sheet © NXP B.V. 2008. All rights reserved. Rev. 01 — 16 December 2008 8 of 26 TFA9815 NXP Semiconductors Audio amplifier 2 x 17 W 9. Internal circuitry Table 7. Internal circuitry Pin Symbol 1 VSSD(HW) 16 VSSD(HW) 17 VSSD(HW) 32 VSSD(HW) Equivalent circuit 1,16, 17, 32 VDDA 22 V VSSA 010aaa384 2 IN1P 3 IN1N 14 IN2N 15 IN2P VDDA1, VDDA2 2, 14 5.5 V 135 kΩ hvp VSSA 5.5 V 135 kΩ 3, 15 VSSA1, VSSA2 010aaa385 4 VDDA1 5 VSSA1 12 VSSA2 13 VDDA2 4, 12 22 V 5, 13 010aaa386 6 SO/OL VDDA1 VDDA1 50 µA 110 kΩ 6 VSSA1 VSSA 010aaa381 TFA9815_1 Preliminary data sheet © NXP B.V. 2008. All rights reserved. Rev. 01 — 16 December 2008 9 of 26 TFA9815 NXP Semiconductors Audio amplifier 2 x 17 W Table 7. Internal circuitry …continued Pin Symbol 7 ENABLE Equivalent circuit VDDA1 3 kΩ 7 250 nA VSSA 010aaa387 8 CDELAY VDDA1 2.8 µA 8 200 nA 2.8 kΩ DISCHARGE VSSA1 010aaa379 10 DIAG VDDA1 10 VSSA1 VSSD 010aaa030 11 TEST VDDA1 11 13 kΩ 9V VSSA1 010aaa031 TFA9815_1 Preliminary data sheet © NXP B.V. 2008. All rights reserved. Rev. 01 — 16 December 2008 10 of 26 TFA9815 NXP Semiconductors Audio amplifier 2 x 17 W Table 7. Internal circuitry …continued Pin Symbol 18 STAB2 31 STAB1 Equivalent circuit VDDA1, VDDA2 50 mA 18, 31 12 V VSSD 010aaa445 19 VSSP2 24 VDDP2 25 VDDP1 30 VSSP1 24, 25 23.5 V 19, 30 010aaa446 20 BOOT2N 29 BOOT1N 20, 29 12 V OUT2N, OUT1N 010aaa447 21 OUT2N 23 OUT2P 26 OUT1P 28 OUT1N VDDP1, VDDP2 21, 23, 26, 28 VSSP1, VSSP2 010aaa380 22 BOOT2P 27 BOOT1P 22, 27 12 V OUT2P 010aaa448 TFA9815_1 Preliminary data sheet © NXP B.V. 2008. All rights reserved. Rev. 01 — 16 December 2008 11 of 26 TFA9815 NXP Semiconductors Audio amplifier 2 x 17 W 10. Limiting values Table 8. Limiting values In accordance with the Absolute Maximum Rating System (IEC 60134). Symbol Parameter Conditions Min Max Unit VP supply voltage Asymmetrical −0.3 +23.1 V IORM repetitive peak output current - 3 - A Tj junction temperature - - 180 °C Tstg storage temperature - −55 +150 °C Tamb ambient temperature - −40 +85 °C Pmax maximum power dissipation - - 5 W Vx voltage on pin x DIAG VSS − 0.3 12 V IN1P - IN1N −6 +6 V IN2P - IN2N −6 +6 V VSS − 0.3 VDD + 0.3 V all other pins Vesd electrostatic discharge voltage HBM [1] −2000 +2000 V MM [2] −200 +200 V [1] Human-body model (HBM): RS = 1500 Ω; C = 100 pF; for pins 2, 3, 14, and 15: Vesd = ±1500 V. [2] Machine model (MM): RS = 0 Ω; C = 200 pF; L = 0.75 µH. 11. Thermal characteristics Table 9. Characteristics Symbol Parameter Conditions Min Typ Max Unit Rth(j-a) thermal resistance from junction to ambient JEDEC test board [1] - 39 42 K/W Two-layer application board [2] - 42 - K/W - - 30 K/W - - 8 K/W Ψj-lead thermal characterization parameter from junction to lead - Ψj-top thermal characterization parameter from junction to top of package - [3] [1] Measured in a JEDEC high K-factor test board (standard EIA/JESD 51-7) in free air with natural convection. [2] Two-layer application board (70 mm x 57 mm), 35 µm copper, FR4 base material in free air with natural convection. [3] Strongly depends on where the measurement is taken on the package. TFA9815_1 Preliminary data sheet © NXP B.V. 2008. All rights reserved. Rev. 01 — 16 December 2008 12 of 26 TFA9815 NXP Semiconductors Audio amplifier 2 x 17 W 12. Characteristics 12.1 Static characteristics Table 10. Characteristics VP= 12 V;Tamb = 25 ˚C; fosc = 550 kHz; typical application diagram Figure 12, unless otherwise specified. Symbol Parameter Conditions Min Typ Max Unit Supply voltage VP supply voltage single asymmetrical supply (VDD − VSS) 8 12 20 V IP supply current Sleep mode - 110 200 µA Iq(tot) total quiescent current Operating mode; no load, no snubbers and no filter connected - 40 50 mA Tj = 25 °C - 150 220 mΩ Series resistance output power switches RDSon drain-source on-state resistance Enable input: pin ENABLE[1] VIL LOW-level input voltage Sleep mode - - 0.8 V VIH HIGH-level input voltage Operating mode 3 - VP V II input current VI = 5 V - 1 20 µA SO/OL input: pin SO/OL[1] VIL LOW-level input voltage self-oscillating configuration 0 - 0.4 V VIH HIGH-level input voltage open-loop configuration 3 4 5 V 10.2 11 11.7 V Stabilizer output pins STAB1 and STAB2 VO output voltage Operating mode [1] Comparator full-differential input stage Voffset(i)(eq) equivalent input offset voltage - - - 1 mV Vn(i)(eq) equivalent input noise voltage 20 Hz < f < 20 kHz - - 15 µV Vi(cm) common-mode input voltage - VSSA + 3 - VDDA V −1 IIB input bias current - - - 1 µA - 150 - 180 °C level internal fixed 20.1 21.5 23 V level internal fixed 7 7.5 7.9 V 3 3.5 - A Overtemperature protection Tact(th_prot) thermal protection activation temperature Overvoltage protection Vth(ovp) overvoltage protection threshold voltage Undervoltage protection VP(uvp) undervoltage protection supply voltage Overcurrent protection IO(ocp) overcurrent protection output current - TFA9815_1 Preliminary data sheet [2] © NXP B.V. 2008. All rights reserved. Rev. 01 — 16 December 2008 13 of 26 TFA9815 NXP Semiconductors Audio amplifier 2 x 17 W Table 10. Characteristics …continued VP= 12 V;Tamb = 25 ˚C; fosc = 550 kHz; typical application diagram Figure 12, unless otherwise specified. Symbol Parameter Conditions Min Typ Max Unit HIGH-level - VDDA − 1 - V LOW-level - VSSA + 1 - V Window Protection (WP) output voltage VO [1] Measured with respect to VSSD. [2] Current limiting concept: in overcurrent condition no interruption of the audio signal in case of impedance drop. 12.2 Dynamic characteristics Table 11. Switching characteristics VP= 12 V;Tamb = 25 ˚C; fosc = 550 kHz unless otherwise specified. Symbol Parameter Conditions Min Typ Max Unit Timing PWM output: pins OUT1 and OUT2 tr rise time IO = 0 A - 10 - ns tf fall time IO = 0 A - 10 - ns tw(min) minimum pulse width IO = 0 A - 60 - ns 12.3 AC characteristics measured in typical application Table 12. AC characteristics measured in typical application Symbol Parameter Po(RMS) RMS output power Conditions Min Typ Max Unit VP = 15 V; RL = 8 Ω; THD = 10 % 15 16 - W VP = 12 V; RL = 8 Ω; THD = 10 % 9 10 - W VP = 12 V; RL = 6 Ω; THD = 10 % 12 13 - W 17 18 - W - 0.05 0.1 % VP = 12 V; RL = 4 Ω; THD = 10 % [1] THD+N total harmonic distortion-plus-noise Po = 1 W; fi = 1 kHz ηpo output power efficiency Po = 2 × 10 W at 8 Ω 89 91 - % Po = 2 × 18 W at 4 Ω 88 90 - % Gv(cl) closed-loop voltage gain Vi = 100 mV (RMS); fi = 1 kHz 18.6 19.3 21 dB Vn(o) output noise voltage inputs shorted; AES17 brick-wall - 150 - µV S/N signal-to-noise ratio Vo = 10 V (RMS); Gv(cl) = 20 dB 94 96 - dB 34 45 - dB 55 70 - dB SVRR supply voltage ripple rejection Operating mode; fi = 1 kHz αcs channel separation Po = 1 W; fi = 1 kHz [2] [1] THD+N is measured in a bandwidth of 20 Hz to 20 kHz, AES17, brick-wall. [2] Minimum value determined by R5, R10, R17, R22 equalling +1 % and R7, R14, R18, R20 equalling −1 %. TFA9815_1 Preliminary data sheet © NXP B.V. 2008. All rights reserved. Rev. 01 — 16 December 2008 14 of 26 TFA9815 NXP Semiconductors Audio amplifier 2 x 17 W 13. Application information 13.1 Output power estimation For BTL configuration the output power can be estimated using Equation 1: P o 1% 2 RL ------------------------------------------------------ × V P R L + 2 × ( R DSon + R S ) = --------------------------------------------------------------------------------2 × RL (1) Where, • • • • VP = supply voltage [V] RL = load impedance [Ω] RDSon = on resistance power switch [Ω] RS = series resistance output inductor [Ω] The output power at 10% THD can be estimated by using Equation 2 (2) Po 10% = 1.25 × P o 0.5% Figure 5 and Figure 6 below show the estimated output power at THD = 0.5 % and THD = 10 % as a function of the BLT supply voltage for different load impedances. 010aaa449 40 Po (W) 30 2 20 3 1 10 0 8 10 12 14 16 18 20 VP (V) THD+N = 0.5 % f = 1 kHz (1) 4 Ω (2) 6 Ω (3) 8 Ω Fig 5. BTL output power as function of supply voltage: THD = 1 % TFA9815_1 Preliminary data sheet © NXP B.V. 2008. All rights reserved. Rev. 01 — 16 December 2008 15 of 26 TFA9815 NXP Semiconductors Audio amplifier 2 x 17 W 010aaa450 40 Po (W) 30 20 1 10 2 3 0 8 10 12 14 16 18 20 VP (V) THD+N = 10 % f = 1 kHz (1) RL = 4 Ω (2) RL = 6 Ω (3) RL = 8 Ω Fig 6. BTL output power as function of supply voltage: THD = 10 % 13.2 Output current limiting The maximum peak output current is limited by the level of the overcurrent protection threshold. During normal operation the output current should not exceed this threshold level of 3 A otherwise the OCP will be triggered and the device will stop switching for 5 µs. The peak output current in BTL can be estimated using the following equation: VP I O max ≤ ------------------------------------------------------ ≤ 3 A R L + 2 × ( R DSon + R S ) Where: • • • • VP = supply voltage [V] RL = load impedance [Ω] RDSon = on resistance power switch [Ω] RS = series resistance output inductor [Ω] 13.3 Speaker configuration and impedance For a flat-frequency response (second-order Butterworth filter) it is necessary to change the low-pass filter components LLC and CLC according to the speaker configuration and impedance. Table 13 shows the practical required values: TFA9815_1 Preliminary data sheet © NXP B.V. 2008. All rights reserved. Rev. 01 — 16 December 2008 16 of 26 TFA9815 NXP Semiconductors Audio amplifier 2 x 17 W Table 13. Filter component values Configuration Impedance (Ω) LLC (µH) CLC (nF) BTL 4 10 1500 6 15 1000 8 22 680 13.4 Differential input For a high common-mode rejection ratio and a maximum of flexibility in the application, the audio inputs of the application are fully differential. The input configuration for a differential-input application is illustrated in Figure 7. OUT1P + AUDIO DSP − IN1 + VSS − OUT1N 010aaa382 Fig 7. Input configuration for a differential input 13.5 Single-ended input When using an audio source with a single-ended ‘out’, it is important to connect the IN1N from the application board to the VSS of the audio source (e.g. Audio Digital Signal Processing (Audio DSP)). The input configuration for a single-ended ‘in’ application is illustrated in Figure 8. TFA9815_1 Preliminary data sheet © NXP B.V. 2008. All rights reserved. Rev. 01 — 16 December 2008 17 of 26 TFA9815 NXP Semiconductors Audio amplifier 2 x 17 W OUT1P + IN1P AUDIO DSP IN1N − VSS OUT1N 010aaa383 Fig 8. Input configuration for a single-ended input 13.6 Curves measured in a typical application 010aaa451 26 Gv (dB) 22 18 14 10 10 102 103 104 105 fi (Hz) VP = 12 V; RL = 4 Ω; VI = 300 mV (RMS) Fig 9. Gain as a function of frequency TFA9815_1 Preliminary data sheet © NXP B.V. 2008. All rights reserved. Rev. 01 — 16 December 2008 18 of 26 TFA9815 NXP Semiconductors Audio amplifier 2 x 17 W 010aaa452 102 THD+N (%) 10 1 1 10−1 2 10−2 10−3 102 10 103 104 105 fi (Hz) VP = 12 V; RL = 4 Ω (1) Po = 1 W (2) Po = 10 W Fig 10. Total harmonic distortion + noise as a function of frequency 010aaa453 102 THD+N (%) 10 1 1 2 10−1 10−2 10−3 10−2 3 10−1 1 102 10 Po (W) VP = 12 V; RL = 4 Ω; f = 1 kHz (1) 6 kHz (2) 1 kHz (3) 100 Hz Fig 11. Total harmonic distortion as a function of output power 13.7 Typical application diagram TFA9815 A typical application diagram with the TFA9815 supplied from an asymmetrical supply is shown in Figure 12. TFA9815_1 Preliminary data sheet © NXP B.V. 2008. All rights reserved. Rev. 01 — 16 December 2008 19 of 26 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 12 V 12 V C32 220 µF 12 V L1 BEAD R3 10 Ω C33 100 nF C3 100 nF 1 2 IN1 ENABLE C4 100 nF GND VDDA1 R5 100 kΩ 4 R7 R6 10 kΩ 10 kΩ R31 IN1P Rev. 01 — 16 December 2008 R10 GND C10 220 pF 10 kΩ R11 9 25 2 GND VDDP2 24 26 27 R32 IN1N 3 29 R35 200 kΩ 28 CDELAY SO/OL 31 GND 1 R18 10 VDDA2 11 R33 IN2P R19 10 kΩ C21 220 pF J5 R22 GND C24 220 pF R23 GND C13 GND 680 nF 1 OUT1 L4 22 µH STAB1 C16 1µF Snubber network (Optional) GND STAB2 OUT2+ 23 22 15 GND L5 22 µH OUT2P C19 220 nF BOOT2P 2 J6 R29 10 Ω C29 470 pF R30 10 Ω C30 470 pF C20 680 nF 10 kΩ 20 C22 68 pF BOOT2N C25 220 nF R34 IN2N 21 OUT2N GND OUT2+ Fig 12. Typical application diagram TFA9815 5 12 1 16 17 32 30 19 C23 GND 680 nF 1 10 kΩ R26 100 kΩ GND OUT2− L6 22 µH OUT2 R100 22 Ω VSSA1 VSSA2 VSSD VSSD VSSD VSSDVSSP1 VSSP2 GND 010aaa454 TFA9815 20 of 26 © NXP B.V. 2008. All rights reserved. J7 C28 470 pF C17 1µF 14 10 kΩ 10 kΩ R28 10 Ω C12 680 nF Audio amplifier 2 x 17 W C26 1 µF DIAG R17 100 kΩ 10 kΩ 2 IN2 18 7 ENABLE C27 470 pF OUT1N 6 TFA9815 OUT2− R27 10 Ω OUT1− 8 2 J3 BOOT1N C14 220 nF OUT1+ C18 1 µF C9 220 nF BOOT1P 10 kΩ C15 4.7 µF L3 22 µH OUT1+ OUT1P STAB1 R14 100 kΩ GND 13 GND n.c VDDP1 C11 47 pF 10 kΩ J4 VDDA2 C5 100 nF 10 kΩ C8 220 pF J2 C7 1 µF SW1 C31 100 nF GND OUT1− C6 1 µF L2 BEAD C2 220 µF C1 220 µF 2 GND NXP Semiconductors TFA9815_1 Preliminary data sheet 1 VP J1 TFA9815 NXP Semiconductors Audio amplifier 2 x 17 W 13.8 Typical application: bill of materials Table 14. Typical application: bill of materials Item Quantity Reference Part Footprint 1 2 C1, C2. 220 mF/35 V CE09-02R 2 5 C3, C4, C5, C31, C33. 100 nF/50 V SMD 0805 X7R 3 2 C16, C17. 1 mF/50 V SMD 1206 X7R 4 4 C6, C7, C18, C26 1 mF/25 V MKT 5 4 C8, C10, C21, C24. 220 pF/25 V SMD 0402 NP0 6 4 C9, C14, C19, C25. 220 nF/25 V SMD 0805 X7R 7 1 C11 47 pF/25 V SMD 0402 NP0 8 4 C12, C13, C20, C23. 680 nF/25 V MKT 9 1 C22. 68 pF/25 V SMD 0402 NP0 10 3 J1, J3, J6. CON2 2 pins terminal 11 2 J2, J5. CINCH CINCH 12 2 J4, J7 Jumper Closed on demo board only 13 2 L1, L2 BEAD SMD 1206 Würth Elektronik DC < 0.5 Ω 10 MHz > 80 Ω 14 1 R35 200 kΩ / 0.1 W / 5 % SMD 0603 15 1 C15 4.7 µF / 16 V 16 4 L3, L4, L5, L6. 22 µH 8RDY TOKO A7040HN-220M, 11RHBP TOKO A7503CY-220M or Sagami 7311NA-220M 17 5 R3 10 / 0.25 W / 5% SMD 1206 18 4 R5, R14, R17, R26. 100 kΩ / 0.1 W / 1 % for 20 dB SMD 0603 200 k / 0.1 W / 1 % for 26 dB 19 12 R6, R7, R10, R11, R18, R19, R22, R23, R31, R32, R33, R34. 10 kΩ / 0.1 W / 1 % SMD 0603 20 1 R100 22 Ω / 5 % / 0.1 W SMD 0603 21 1 SW1 SC 1X1 Secme 090320901 22 1 U1 TFA9815T SOT287-1 (SO32) NXP Semiconductors Remark: The power supply requires at least a 1000 µF capacitor. TFA9815_1 Preliminary data sheet © NXP B.V. 2008. All rights reserved. Rev. 01 — 16 December 2008 21 of 26 TFA9815 NXP Semiconductors Audio amplifier 2 x 17 W Table 15. Snubber network: bill of materials Item Quantity Reference Part 1 4 C27, C28, C29, C30 470 pF, 25 V SMD 0805 X7R 2 4 R27, R28, R29, R30 10 / 0.25 W / 5% SMD 1206 TFA9815_1 Preliminary data sheet Footprint © NXP B.V. 2008. All rights reserved. Rev. 01 — 16 December 2008 22 of 26 TFA9815 NXP Semiconductors Audio amplifier 2 x 17 W 14. Package outline SO32: plastic small outline package; 32 leads; body width 7.5 mm SOT287-1 D E A X c y HE v M A Z 17 32 Q A2 A (A 3) A1 pin 1 index θ Lp L 16 1 0 detail X w M bp e 5 10 mm scale DIMENSIONS (inch dimensions are derived from the original mm dimensions) UNIT A max. A1 A2 A3 bp c D (1) E (1) e HE L Lp Q v w y Z (1) mm 2.65 0.3 0.1 2.45 2.25 0.25 0.49 0.36 0.27 0.18 20.7 20.3 7.6 7.4 1.27 10.65 10.00 1.4 1.1 0.4 1.2 1.0 0.25 0.25 0.1 0.95 0.55 0.01 0.02 0.01 0.011 0.007 0.81 0.80 0.30 0.29 0.05 0.419 0.394 inches 0.1 0.012 0.096 0.004 0.089 0.043 0.055 0.016 0.047 0.039 0.01 0.01 0.037 0.004 0.022 θ 8o o 0 Note 1. Plastic or metal protrusions of 0.15 mm (0.006 inch) maximum per side are not included. OUTLINE VERSION SOT287-1 REFERENCES IEC JEDEC JEITA MO-119 EUROPEAN PROJECTION ISSUE DATE 00-08-17 03-02-19 Fig 13. Package outline SOT287-1 (SO32) TFA9815_1 Preliminary data sheet © NXP B.V. 2008. All rights reserved. Rev. 01 — 16 December 2008 23 of 26 TFA9815 NXP Semiconductors Audio amplifier 2 x 17 W 15. Revision history Table 16. Revision history Document ID Release date Data sheet status Change notice Supersedes TFA9815_1 20081216 Preliminary data sheet - - TFA9815_1 Preliminary data sheet © NXP B.V. 2008. All rights reserved. Rev. 01 — 16 December 2008 24 of 26 TFA9815 NXP Semiconductors Audio amplifier 2 x 17 W 16. Legal information 16.1 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. 16.2 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. 16.3 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. 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. 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. 16.4 Trademarks Notice: All referenced brands, product names, service names and trademarks are the property of their respective owners. 17. Contact information For more information, please visit: http://www.nxp.com For sales office addresses, please send an email to: [email protected] TFA9815_1 Preliminary data sheet © NXP B.V. 2008. All rights reserved. Rev. 01 — 16 December 2008 25 of 26 TFA9815 NXP Semiconductors Audio amplifier 2 x 17 W 18. Contents 1 2 3 4 5 6 7 7.1 7.2 8 8.1 8.2 8.3 8.4 8.5 8.6 9 10 11 12 12.1 12.2 12.3 13 13.1 13.2 13.3 13.4 13.5 13.6 13.7 13.8 14 15 16 16.1 16.2 16.3 16.4 17 18 General description . . . . . . . . . . . . . . . . . . . . . . 1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Quick reference data . . . . . . . . . . . . . . . . . . . . . 1 Ordering information . . . . . . . . . . . . . . . . . . . . . 2 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Pinning information . . . . . . . . . . . . . . . . . . . . . . 4 Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 4 Functional description . . . . . . . . . . . . . . . . . . . 5 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Interfacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Input comparators. . . . . . . . . . . . . . . . . . . . . . . 6 Diagnostic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Protections . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . 8 Internal circuitry. . . . . . . . . . . . . . . . . . . . . . . . . 9 Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . 12 Thermal characteristics. . . . . . . . . . . . . . . . . . 12 Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . 13 Static characteristics. . . . . . . . . . . . . . . . . . . . 13 Dynamic characteristics . . . . . . . . . . . . . . . . . 14 AC characteristics measured in typical application. . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Application information. . . . . . . . . . . . . . . . . . 15 Output power estimation. . . . . . . . . . . . . . . . . 15 Output current limiting. . . . . . . . . . . . . . . . . . . 16 Speaker configuration and impedance . . . . . . 16 Differential input . . . . . . . . . . . . . . . . . . . . . . . 17 Single-ended input . . . . . . . . . . . . . . . . . . . . . 17 Curves measured in a typical application . . . . 18 Typical application diagram TFA9815 . . . . . . . 19 Typical application: bill of materials. . . . . . . . . 21 Package outline . . . . . . . . . . . . . . . . . . . . . . . . 23 Revision history . . . . . . . . . . . . . . . . . . . . . . . . 24 Legal information. . . . . . . . . . . . . . . . . . . . . . . 25 Data sheet status . . . . . . . . . . . . . . . . . . . . . . 25 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Contact information. . . . . . . . . . . . . . . . . . . . . 25 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 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. 2008. 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: 16 December 2008 Document identifier: TFA9815_1