TA8276HQ TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic TA8276HQ Max Power 35 W BTL × 4 ch Audio Power IC The TA8276HQ is 4 ch BTL audio power amplifier for car audio application. This IC can generate more high power: POUTMAX = 35 W as it is included the pure complementary PNP and NPN transistor output stage. It is designed low distortion ratio for 4 ch BTL audio power amplifier, built-in stand-by function, muting function, output clipping detection and diagnosis circuit which can detect output to VCC/GND short and over voltage input mode. Additionally, the AUX amplifier and various kind of protector for car audio use are built-in. Weight: 7.7 g (typ.) Features • High power : POUTMAX (1) = 35 W (typ.) (VCC = 14.4 V, f = 1 kHz, JEITA max, RL = 4 Ω) : POUTMAX (2) = 31 W (typ.) (VCC = 13.7 V, f = 1 kHz, JEITA max, RL = 4 Ω) : POUT (1) = 23 W (typ.) (VCC = 14.4 V, f = 1 kHz, THD = 10%, RL = 4 Ω) : POUT (2) = 20 W (typ.) (VCC = 13.2 V, f = 1 kHz, THD = 10%, RL = 4 Ω) • Built-in output clipping detection and diagnosis circuit (pin 25) • Low distortion ratio: THD = 0.02% (typ.) (VCC = 13.2 V, f = 1 kHz, POUT = 5 W, RL = 4 Ω) • Low noise: VNO = 0.10 mVrms (typ.) (VCC = 13.2 V, Rg = 0 Ω, GV = 26 dB, BW = 20 Hz~20 kHz) 1. • Built-in stand-by switch (pin 4) • Built-in muting function (pin 22) • Built-in AUX amplifier from single input to 2 channels output (pin 16) • Built-in various protection circuit • Operating supply voltage: VCC (opr) = 9~18 V : Thermal shut down, over voltage, out to GND, out to VCC, out to out short, speaker burned Note 1: Install the product correctly. Otherwise, it may result in break down, damage and/or degradation to the product or equipment. Note 2: These protection functions are intended to avoid some output short circuits or other abnormal conditions temporarily. These protect functions do not warrant to prevent the IC from being damaged. - In case of the product would be operated with exceeded guaranteed operating ranges, these protection features may not operate and some output short circuits may result in the IC being damaged. 1 2004-05-10 TA8276HQ 20 VCC1 6 VCC2 OUT1 (+) C1 11 9 IN1 PW-GND1 8 OUT1 (−) 12 5 IN2 PW-GND2 2 OUT2 (−) C6 16 15 RL 19 21 IN4 PW-GND4 24 OUT4 (−) RIP CLIP OUT & DIAGNOSIS STBY MUTE OUT 4 25 C2 10 RL 23 22 C4 13 R1 PRE-GND 17 PW-GND3 18 OUT4 (+) 14 3 IN3 OUT3 (−) C1 RL AUX IN OUT3 (+) C1 RL 7 OUT2 (+) C1 C3 1 TAB C5 Block Diagram : PRE-GND : PW-GND Note3: Some of the functional blocks, circuits, or constants in the block diagram may be omitted or simplified for explanatory purpose. 2 2004-05-10 TA8276HQ Caution and Application Method (Description is made only on the single channel.) 1. Voltage Gain Adjustment This IC has no NF (negative feedback) terminals. Therefore, the voltage gain can’t adjusted, but it makes the device a space and total costs saver. Amp. 2A Amp. 1 Input Amp. 2B Figure 1 Block Diagram The voltage gain of Amp.1: GV1 = 0 dB The voltage gain of Amp.2A, B: GV2 = 20 dB The voltage gain of BLT Connection: GV (BTL) = 6 dB Therefore, the total voltage gain is decided by expression below. GV = GV1 + GV2 + GV (BTL) = 0 + 20 + 6 = 26 dB 2. Stand-by SW Function (pin 4) By means of controlling pin 4 (stand-by terminal) to high and low, the power supply can be set to ON and OFF. The threshold voltage of pin 4 is set at about 3VBE (typ.), and the power supply current is about 2 µA (typ.) at the stand-by state. Power VSB (V) ON OFF 0~1.5 OFF ON 3~VCC ON Power OFF 4 10 kΩ ≈ 2VBE to BIAS CUTTING CIRCUIT Control Voltage of pin 4: VSB Stand-by VCC Figure 2 With pin 4 set to High, Power is turned ON Adjustage of Stand-by SW (1) (2) Since VCC can directly be controlled to ON or OFF by the microcomputer, the switching relay can be omitted. Since the control current is microscopic, the switching relay of small current capacity is satisfactory for switching 3 2004-05-10 TA8276HQ RELAY Large current capacity switch BATTERY BATTERY FROM MICROCOMPUTER VCC VCC – Conventional Method – Small current capacity switch BATTERY DIRECTLY FROM MICROCOMPUTER BATTERY Stand-By VCC Stand-By VCC – Stand-by Switch Method – Figure 3 3. Muting Function (pin 22) By means of controlling pin 22 less than 0.5 V, it can make the audio muting condition. The muting time constant is decided by R1 and C4 and these parts is related the pop noise at power ON/OFF. The series resistance; R1 must be set up less than 10 kΩ to get enough muting attenuation. The muting function have to be controlled by a transistor, FET and µ-COM port which has IMUTE > 250 µA ability. Pin 22 terminal voltage has the temperature characteristics of 4.6 V (low temperature) to 3.2 V (high temperature). Therefore, it is need to design with attention as using the microcontroller of which operating voltage is less than 5 V. Terminal 22 may not be pulled up and shall be controlled by OPEN/LOW. When it is obliged to do, it must be pulled up via diode, because it has to defend flowing reverse current to internal circuit of pin 22. <Recommended Application> ATT – VMUTE 20 I (100 µA) A 10 kΩ Mute attenuation ATT IMUTE VMUTE <Application for pulled up> I (100 µA) 22 −20 −40 −60 VCC = 13.2 V 0 IMUTE PL = 4 Ω f = 1 kHz Muting Function BW = 400~30 kHz 0.4 0.8 1 1.2 1.6 2 Point A voltage: VMUTE VMUTE Figure 4 Po = 10 W −80 −100 R1 C4 IMUTE (OFF) 5 kΩ 0 (dB) R1 22 C4 IMUTE (OFF) Figure 5 4 2.4 2.8 3 (V) Mute Attenuation − VMUTE (V) 2004-05-10 TA8276HQ 4. AUX Input (pin 16) 20 dB AMP. The pin 16 is for input terminal of AUX amplifier. The total gain is 0 dB by using of AUX amplifier. Therefore, the µ-COM can directly drive the AUX amplifier. BEEP sound or voice synthesizer signal can be input to pin 16 directly. When AUX function is not used, this pin must be connected to PRE-GND (pin 13) via a capacitor. IN OUT (+) OUT (−) AUX AMP AUX-IN µ-COM 16 −20 dB Figure 6 AUX Input 5. Diagnosis Output (pin 25) This diagnosis output terminal of pin 25 has open collector output structure on chip as shown in Figure 7. In case diagnosis circuit that detect unusual case is operated, NPN Tr. (Q1) is turned on. It is possible to protect all the system of apparatus as well as power IC protection. In case of being unused this function, use this IC as open-connection on pin 25. 5V 25 V25 OUTPUT CLIP DETECTOR 5V Q1 OUTPUT SHORT PROTECTOR GND OVER VOLTAGE PROTECTOR t Q1 is turned on pin 25: Open collector output (active low) Figure 7 5.1 Self Diagnosis Output In Case of Shorting Output to VCC/GND or Over Voltage Power Supplied NPN Tr. (Q1) is turned on. Threshold of over voltage protection: VCC = 22 V (typ.) 5V 25 LED/LCD µ-COM ALAME (Flashing) (Announcement from a speaker.) REGULATOR → OFF (Relay → OFF) MEMORY (Count and record) Figure 8 5.2 Application 1 In Case of Shorting Output to Output NPN Tr. (Q1) is turned on and off in response to the input signal voltage. 5 2004-05-10 TA8276HQ 5.3 Prevention of speaker burning accident (In Case of Rare Short Circuit of Speaker) When the direct current resistance between OUT + and OUT − terminal becomes 1 Ω or less and output current over 4 A flows, this IC makes a protection circuit operate and suppresses the current into a speaker. This system makes the burning accident of the speaker prevent as below mechanism. <The guess mechanism of a burning accident of the speaker> Abnormal output offset voltage (voltage between OUT + and OUT −) over 4 V is made by the external circuit failure.(Note 4) ↓ The speaker impedance becomes 1 Ω or less as it is in a rare short circuit condition. ↓ The current more than 4 A flows into the speaker and the speaker is burned. Current into a speaker Operating point of protector Less than 4 Ω About 1 Ω 4Ω Speaker impedance Figure 9 Note 4: It is appeared by biased input DC voltage (for example, large leakage of the input capacitor, short-circuit between copper patterns of PCB.) 5.4 Applications When output terminals short-circuit to VCC or GND, the voltage of 25pin is fixed to “L”. And when shorting OUT + to OUT −, “L” and “H” are switched according to an input signal. Therefore, it is possible to judge how the power IC condition is if a micro-controller detects the 25pin voltage that is smoothed out with LPF. It is recommend that the threshold voltage (Vth) is set up as higher as possible because output level of LPF is changed according to an input signal. (for example, Vth is set up to 4 V if 25pin is pulled up to 5 V line.) Output voltage of L.P.F. Operating point of protector 5V Output power Figure 10 6 2004-05-10 TA8276HQ 6. Output Clip Detection Function (pin 25) The output clip detection terminal of pin 25 has the open collector output structure on chip as shown in Figure 11. In case that the output waveform is clipping, the clip detection circuit is operated and NPN Tr. is turned on. It is possible to improve the audio quality with controlling the volume, tone control circuit through L.P.F. smoothing circuit as shown in Figure 11. In case of being unused this function, use this IC as open connection on pin 25. (Application) 5V 25 OUTPUT CLIP DETECTOR VOLUME CONTROL CIRCUIT L.P.F. SMOOTHING CIRCUIT TONE CONTROL CIRCUIT pin 25: Open collector output (active low) Figure 11 (A) Output (AC wave form) AC (A) t (B) Clip Detector Circuit (internal) DC (B) t (B) Clip Detector Terminal (pin 25) DC (C) 5V GND t Figure 12 Clip Detection 7 2004-05-10 TA8276HQ Maximum Ratings (Ta = 25°C) Characteristics Symbol Rating Unit VCC (surge) 50 V DC supply voltage VCC (DC) 25 V Operation supply voltage VCC (opr) 18 V Peak supply voltage (0.2 s) Output current (peak) IO (peak) Power dissipation PD (Note 5) 9 A 125 W Operation temperature Topr −40~85 °C Storage temperature Tstg −55~150 °C Note 5: Package thermal resistance θj-T = 1°C/W (typ.) (Ta = 25°C, with infinite heat sink) The absolute maximum ratings of a semiconductor device are a set of specified parameter values, which must not be exceeded during operation, even for an instant. If any of these rating would be exceeded during operation, the device electrical characteristics may be irreparably altered and the reliability and lifetime of the device can no longer be guaranteed. Moreover, these operations with exceeded ratings may cause break down, damage and/or degradation to any other equipment. Applications using the device should be designed such that each maximum rating will never be exceeded in any operating conditions. Before using, creating and/or producing designs, refer to and comply with the precautions and conditions set forth in this documents. Electrical Characteristics (unless otherwise specified, VCC = 13.2 V, f = 1 kHz, RL = 4 Ω, Ta = 25°C) Symbol Test Circuit ICCQ ⎯ POUT MAX (1) Min Typ. Max Unit VIN = 0 ⎯ 200 400 mA ⎯ VCC = 14.4 V, max Power ⎯ 35 ⎯ POUT MAX (2) ⎯ VCC = 13.7 V, max Power ⎯ 31 ⎯ POUT (1) ⎯ VCC = 14.4 V, THD = 10% ⎯ 23 ⎯ POUT (2) ⎯ THD = 10% 17 20 ⎯ THD ⎯ POUT = 5 W ⎯ 0.02 0.2 Voltage gain GV ⎯ VOUT = 0.775 Vrms (0 dBm) 24 26 28 Voltage gain ratio ∆GV ⎯ VOUT = 0.775 Vrms (0 dBm) −1.0 0 1.0 VNO (1) ⎯ Rg = 0 Ω, DIN45405 ⎯ 0.12 ⎯ VNO (2) ⎯ Rg = 0 Ω, BW = 20 Hz~20 kHz ⎯ 0.10 0.35 Ripple rejection ratio R.R. ⎯ frip = 100 Hz, Rg = 620 Ω Vrip = 0.775 Vrms (0 dBm) 40 50 ⎯ dB Cross talk C.T. ⎯ Rg = 620 Ω VOUT = 0.775 Vrms (0 dBm) ⎯ 65 ⎯ dB VOFFSET ⎯ ⎯ −150 0 150 mV Input resistance RIN ⎯ ⎯ ⎯ 90 ⎯ kΩ Stand-by current ISB ⎯ Stand-by condition ⎯ 2 10 µA VSB H ⎯ Power: ON 3.0 ⎯ VCC VSB L ⎯ Power: OFF 0 ⎯ 1.5 VM H ⎯ Mute: OFF VM L ⎯ Mute: ON, R1 = 10 kΩ 0 ⎯ 0.5 V ATT M ⎯ Mute: ON, VOUT = 7.75 Vrms (20 dBm) at Mute: OFF. 80 90 ⎯ dB Characteristics Quiescent current Output power Total harmonic distortion Output noise voltage Output offset voltage Stand-by control voltage Mute control voltage Mute attenuation (Note 2) Test Condition W % dB mVrms V ⎯ Open Note 2: Muting function have to be controlled by open and low logic, which logic is a transistor, FET and µ-COM port of IMUTE > 250 µA ability.This means than the mute control terminal : pin 22 must not be pulled-up. 8 2004-05-10 TA8276HQ OUT1 (+) C1 11 9 IN1 PW-GND1 8 OUT1 (−) OUT2 (+) 0.22 µF C1 12 5 IN2 PW-GND2 2 OUT2 (−) 0.22 µF C6 16 C1 15 14 RL 19 21 IN4 PW-GND4 24 OUT4 (−) RIP CLIP OUT & DIAGNOSIS STBY MUTE OUT 4 25 10 µF C2 10 RL 23 22 C4 13 10 kΩ R1 PRE-GND 17 PW-GND3 18 OUT4 (+) C1 3 IN3 OUT3 (−) 0.22 µF RL AUX IN OUT3 (+) 0.22 µF RL 7 1 µF 0.22 µF C3 6 VCC2 0.1 µF 20 VCC1 3900 µF 1 TAB C5 Test Circuit : PRE-GND : PW-GND Components in the test circuits are only used to obtain and confirm the device characteristics. These components and circuits do not warrant to prevent the application equipment from malfunction or failure. 9 2004-05-10 TA8276HQ T.H.D – POUT T.H.D – POUT 100 100 (%) f = 1 kHz RL = 4 Ω 10 Total harmonic distortion T.H.D Total harmonic distortion T.H.D (%) VCC = 13.2 V RL = 4 Ω 1 10 kHz 100 Hz 0.1 10 1 9.0 V 13.2 V 0.1 1 kHz 16.0 V 0.01 0.1 1 10 Output power POUT 0.01 0.1 100 1 (W) Output power ICCQ – VCC (W) 1 (%) RL = ∞ Total harmonic distortion T.H.D VIN = 0 300 ICCQ (mA) POUT 100 T.H.D – f 400 Quiescent current 10 200 100 0 0 10 Power supply voltage 20 0.1 OUT1 OUT2 0.01 OUT4 VCC = 13.2 V RL = 4 Ω Pout = 5 W 0.001 10 30 VCC (V) OUT3 100 1k Frequency f 10 10 k 100 k (Hz) 2004-05-10 TA8276HQ VNO – Rg R.R. – f 300 0 (dB) 200 VCC = 13.2 V Ripple rejection ratio R.R. (µVrms) RL = 4 Ω 250 BW = 20 Hz~20 kHz Output noise voltage VNO VCC = 13.2 V 150 100 50 0 10 100 1k 10 k Signal source resistance Rg −10 RL = 4 Ω Rg = 620 Ω −20 Vrip = 0dBm −30 −40 −50 −60 −70 10 100 k 100 (Ω) Frequency f C.T. – f (OUT1) (Hz) VCC = 13.2 V VOUT = 0.775 Vrms (0 dBm) −10 VOUT = 0.775 Vrms (0 dBm) Rg = 620 Ω Cross talk C.T. (dB) Rg = 620 Ω Cross talk C.T. (dB) 100 k 0 VCC = 13.2 V −20 10 k C.T. – f (OUT2) 0 −10 1k RL = 4 Ω −30 −40 −50 −20 RL = 4 Ω −30 −40 −50 OUT1 → OUT2, 3 −60 OUT2 → OUT1 −60 OUT1 → OUT4 −70 10 100 1k Frequency f 10 k OUT2 → OUT3, 4 −70 10 100 k 100 (Hz) Frequency f C.T. – f (OUT3) −10 RL = 4 Ω VOUT = 0dBm Cross talk C.T. (dB) Cross talk C.T. (dB) (Hz) VCC = 13.2 V RL = 4 Ω VOUT = 0dBm Rg = 620 Ω −30 −40 OUT3 → OUT4 −50 −20 Rg = 620 Ω −30 −40 −50 OUT3 → OUT1 −60 −70 10 100 k 0 VCC = 13.2 V −20 10 k C.T. – f (OUT4) 0 −10 1k OUT4 → OUT3 −60 OUT3 → OUT2 100 1k Frequency f 10 k −70 10 100 k (Hz) OUT4 → OUT1, 2 100 1k Frequency f 11 10 k 100 k (Hz) 2004-05-10 TA8276HQ GV – f PD – POUT 40 70 20 60 (W) GV (dB) 30 Voltage gain 35 16 V Power dissipation PD 50 25 15 10 VCC = 13.2 V RL = 4 Ω 5 40 13.2 V 30 20 9V 10 f = 1 kHz RL = 4 Ω VOUT = 0.775 Vrms (0 dBm) 0 10 0 100 1k Frequency f 10 k 100 k (Hz) 0 5 10 Output power 15 20 25 POUT/ch (C) PD MAX – Ta 120 Allowable power dissipation PD MAX. (w) ① INFINITE HEAT SINK RθJC = 1°C/W ② HEAT SINK (RθHS = 3.5°C/W) 100 RθJC + RθHS = 4.5°C/W ③ NO HEAT SINK 80 RθJA = 39°C/W ① 60 40 20 ② ③ 0 0 25 50 75 Ambient temperature 100 125 150 Ta (°C) 12 2004-05-10 TA8276HQ Package Dimensions Weight: 7.7 g (typ.) 13 2004-05-10 TA8276HQ About solderability, following conditions were confirmed • Solderability (1) Use of Sn-63Pb solder Bath · solder bath temperature = 230°C · dipping time = 5 seconds · the number of times = once · use of R-type flux (2) Use of Sn-3.0Ag-0.5Cu solder Bath · solder bath temperature = 245°C · dipping time = 5 seconds · the number of times = once · use of R-type flux RESTRICTIONS ON PRODUCT USE 030619EBF • The information contained herein is subject to change without notice. • The information contained herein is presented only as a guide for the applications of our products. No responsibility is assumed by TOSHIBA for any infringements of patents or other rights of the third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of TOSHIBA or others. • TOSHIBA is continually working to improve the quality and reliability of its products. Nevertheless, semiconductor devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical stress. It is the responsibility of the buyer, when utilizing TOSHIBA products, to comply with the standards of safety in making a safe design for the entire system, and to avoid situations in which a malfunction or failure of such TOSHIBA products could cause loss of human life, bodily injury or damage to property. In developing your designs, please ensure that TOSHIBA products are used within specified operating ranges as set forth in the most recent TOSHIBA products specifications. Also, please keep in mind the precautions and conditions set forth in the “Handling Guide for Semiconductor Devices,” or “TOSHIBA Semiconductor Reliability Handbook” etc.. • The TOSHIBA products listed in this document are intended for usage in general electronics applications (computer, personal equipment, office equipment, measuring equipment, industrial robotics, domestic appliances, etc.). These TOSHIBA products are neither intended nor warranted for usage in equipment that requires extraordinarily high quality and/or reliability or a malfunction or failure of which may cause loss of human life or bodily injury (“Unintended Usage”). Unintended Usage include atomic energy control instruments, airplane or spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments, medical instruments, all types of safety devices, etc.. Unintended Usage of TOSHIBA products listed in this document shall be made at the customer’s own risk. • The products described in this document are subject to the foreign exchange and foreign trade laws. • TOSHIBA products should not be embedded to the downstream products which are prohibited to be produced and sold, under any law and regulations. • This product generates heat during normal operation. However, substandard performance or malfunction may cause the product and its peripherals to reach abnormally high temperatures. The product is often the final stage (the external output stage) of a circuit. Substandard performance or malfunction of the destination device to which the circuit supplies output may cause damage to the circuit or to the product. 14 2004-05-10