TA8252H TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic TA8252H Max Power 37W BTL × 4ch Audio Power IC The TA8252H is 4ch BTL audio power amplifier for car audio application. This IC can generate more high power: POUT MAX = 37W as it is included the pure complementary PNP and NPN transistor output stage. It is designed low distortion ratio for 4ch BTL audio power amplifier,built−in stand−by function, muting function,clip detector,and diagnosis circuit. Additionally, the AUX.amplifier is built−in, it can make the beep signal etc.output to 2 channnels (out 1 and 4).It contains various kind of protectors for car audio use. Weight: 9.8g (typ.) Features · High power : POUT MAX (1) = 37W (typ.) (VCC = 14.4V, f = 1kHz, EIAJ max., RL = 4Ω) : POUT MAX (2) = 35W (typ.) (VCC = 13.7V, f = 1kHz, EIAJ max., RL = 4Ω) : POUT (1) = 24W (typ.) (VCC = 14.4V, f = 1kHz, THD = 10%, RL = 4Ω) : POUT (2) = 21W (typ.) (VCC = 13.2V, f = 1kHz, THD = 10%, RL = 4Ω) · Built−in clip detector & diagnosis circuit.(pin(25)) · Low distortion ratio: THD = 0.02% (typ.) (VCC = 13.2V, f = 1kHz, POUT = 5W, RL = 4Ω) · Low noise: VNO = 0.10mVrms (typ.) (VCC = 13.2V, Rg = 0Ω, GV = 26dB, BW = 20~20kHz) · Built−in stand−by switch function (pin(2)) · Built−in multing function (pin(24)) · Built−in AUX. amplifier from single input (pin(16)) to 2 channels output; out1 and 4 · Built−in various protection circuit : Thermal shut down, Over voltage, Out to GND, Out to VCC, Out to Out short. · Operating supply voltage: VCC (opr) = 9~18V 1 2002-10-30 TA8252H OUT1(+) + 15 IN1 + - C1 GND1 OUT1(-) OUT2(+) + IN2 + - GND2 - 18 OUT3(+) + - GND3 - OUT3(-) OUT4(+) + IN4 + - C1 GND4 - 13 RIP 23 22 RL 21 9 8 RL 7 3 4 RL 5 CLIP OUT & STBY DIAGNOSIS OUT MUTE 2 25 24 R1 C2 - + 10 OUT4(-) 2 + IN3 C1 12 19 AUX IN + 11 RL C4 16 OUT2(-) - 14 C1 PRE-GND 17 - C3 6 VCC2 + 20 VCC1 - 1 TAB C5 Block Diagram 2002-10-30 TA8252H 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 + − (Fig.1) Block diagram The voltage gain of amp.1: GV1 = 0dB The voltage gain of amp.2A, B: GV2 = 20dB The voltage gain of BTL connection: GV (BTL) = 6dB 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(2)) By means of controlling pin(2) (stand-by terminal) to high and low, the power supply can be set to on and off. The threshold voltage of pin(2) is set at about 3VBE (typ.), and the power supply current is about 2µA (typ.) at the stand-by state. VCC ON OFF Power 2 10kΩ ≈2VBE to Bias cutting circuit Control voltage of pin(2): V (SB) Stand-by Power V (SB) (V) On Off 0~1.5 Off On 3~6 (Fig.2) With pin(2) set to High, Power is turned ON Adjustage of stand-by SW (1) Since VCC can directly be controlled to on or off by the microcomputer, the switching relay can be omitted. (2) Since the control current is microscopic, the switching relay of small current capacity is satisfactory for switching 3 2002-10-30 TA8252H Relay Large current capacity switch Battery Battery VCC VCC From microcomputer － Conventional Method － Small current capacity switch Directly from microcomputer Battery Battery Stand-By VCC Stand-By VCC ― Stand-by switch method ― (Fig.3) 3. Multing function (pin(24)) By means of controlling pin(24) less than 0.5V, 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 15kΩ, we recommend 10kΩ. The muting function have to be controlled by a transistor, FET and µ-COM port which has IMUTE > 250µA ability. Terminal (24) must not be pulled up and it shall be controlled by open / low. ATT – Vmute 20 24 C4 I(100µA) IMUTE(OFF) R1 Mute attenuation ATT (dB) R1 = 15kΩ A IMUTE VMUTE 10kΩ 5kΩ 0 −20 −40 −60 VCC = 13.2 V Po = 10 W −80 −100 0 RL = 4 Ω f = 1 kHz 0.4 0.8 1.2 1.6 2 2.4 2.8 Pin(24) voltage : Vmute (V) (Fig.4) Muting function (Fig.5) Mute attenuation-Vmute (V) 4 2002-10-30 TA8252H 4.AUX. input (pin(16)) The pin(16) is for input terminal of AUX. amplifier. The total gain is 0dB by using of AUX. amplifier. Therfore, the µ-COM can directly drive the AUX. amplifier. Beep sound or voice synthesizer signal can be input to pin(16) directly. 20dB AMP. IN + OUT(+) − OUT(−) + − µ-COM AUX-IN AUX AMP 16 −20dB (Fig.6) AUX input 5. Diagnosis output (pin(25)) The diagnosis output terminal of pin(25) has open collector output structure on clip as shown in Fig.7. In unusual case that output terminal of power amp. is condition of output to VCC or output to GND short and over voltage input mode, 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). (Application) 5V Clip detector output Diagnosis output 5V V3 25 25 LED/LCD (Flashing) Alarm (Announcement from a speaker.) 5V GND µ-COM Regulator→OFF t (Relay→OFF) Memory (Count and record) Outpout short or over voltage input Pin(25): Open collector output (active low) (Fig.7) (Fig.8) 5 2002-10-30 TA8252H 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 Fig.9. 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 Fig.9. In case of being unused this function, use this IC as open connection on pin(25). (Application) 5V 25 Clip detector output L.P.F. Smoothing circuit Diagnosis output Pin 25 Volume control circuit Tone control circuit : Open collector output (active low) (Fig.9) AC (A) Output (AC wave form) (A) t DC (B) Clip detector circuit (internal) (B) t DC (C) Clip DET. terminal (pin 25 ) (C) 5V GND t 6 2002-10-30 TA8252H 7. Cross talk The cross talk characteristics of the IC is not good between out1 and 2, out3 and 4. So we recommend to use by below method. Out1, 2 L-ch (or R-ch) Out3, 4 R-ch (or L-ch) And, please refer to below table in case of applying the AUX. in because it is out to out1 and 4. ex) In case of the signal from AUX. in to front speakers. Out1 Front Out2 Rear Out3 Rear Out4 Front L-ch (or R-ch) R-ch (or L-ch) AUX. out — — AUX. out 7 2002-10-30 TA8252H Maximum Rating (Ta = 25°C) Characteristic Symbol Rating Unit VCC (surge) 50 V DC supply voltage VCC (DC) 25 V Operating supply voltage VCC (opr) 18 V Output current (peak) IO (peak) 9 A PD (*) 250 W Operating temperature Topr -40~85 °C Storage temperature Tstg -55~150 °C Peak supply voltage (0.2s) Power dissipation (*): Package thermal resistance θj-T = 0.5°C / W (typ.) (Ta = 25°C, with infinite heat sink) Electrical Characteristics (unless otherwise specified VCC = 13.2V, f = 1kHz, RL = 4Ω, Ta = 25°C) Characteristic Quiescent current Output power Total harmonic distortion Voltage gain Voltage gain ratio Output noise voltage Symbol Test Circuit ICCQ — POUT MAX (1) Min. Typ. Max. Unit VIN = 0 — 200 400 mA — VCC = 14.4V, max power — 37 — POUT MAX (2) — VCC = 13.7V, max power — 35 — POUT (1) — VCC = 14.4V, THD = 10% — 24 — POUT (2) — THD = 10% 19 21 — THD — POUT = 3W — 0.02 0.2 % GV — VOUT = 0.775Vrms (0dBm) 24 26 28 dB ∆GV — VOUT = 0.775Vrms (0dBm) -1.0 0 1.0 dB VNO (1) — Rg = 0Ω, DIN45405 — 0.12 — mVrms Rg = 0Ω, BW = 20Hz~20kHz — 0.10 0.35 mVrms VNO (2) Condition W Ripple rejection ratio R.R. — frip = 100Hz, Rg = 620Ω Vrip = 0.775Vrms (0dBm) 40 50 — dB Cross talk C.T. — Rg = 620Ω, VOUT = 0.775Vrms (0dBm) — 65 — dB VOFFSET — — -100 0 +100 mV Input resistance RIN — — — 90 — kΩ Stand-by current ISB — Stand-by condition — 2 10 µA Stand-by control voltage VSB H — Power: On 3.0 — 6.0 VSB L — Power: Off 0 — 1.5 VM H — Mute: Off VM L — Mute: On, R1 = 10kΩ 0 — 0.5 ATT M — Mute: On VOUT = 7.75Vrms (20dBm) at mute: Off. 80 90 — Output offset voltage Mute control voltage (*) Mute attenuation Open V V dB (*): Muting function have to be controlled by open and low logic, which logic is a transistor, FET and µ-COM port of IMUTE > 250µA ability. This means that the mute control terminal: Pin(24) must not be pulled-up. 8 2002-10-30 TA8252H OUT1(+) + + − C1 GND1 − OUT1(−) OUT2(+) + 0.22µF 14 IN2 + − C1 GND2 − 16 OUT2(−) 11 IN3 OUT3(+) + − C1 GND3 − OUT4(+) + − GND4 − 13 RIP 0.1µF RL 19 23 22 RL 21 9 8 RL 7 3 4 RL 5 CLIP OUT & STBY DIAGNOSIS OUT MUTE 2 25 − + 10µF C2 10 OUT4(−) 24 10kΩ R1 12 IN4 C1 PRE-GND OUT3(−) + 0.22µF 18 AUX IN + 0.22µF 17 9 C4 1µF 15 IN1 − + 0.22µF C3 6 VCC2 3900µF 20 VCC1 C5 1 TAB − + Test Circuit 2002-10-30 TA8252H THD – POUT THD – POUT VCC = 13.2 V RL = 4 Ω f = 1 kHz RL = 4 Ω 1ch Drive Total harmonic distortion Total harmonic distortion 13.2V 10 THD (%) 10 THD (%) 1ch Drive f =10kHz 0.1 100Hz VCC = 9.0V 16.0V 0.1 1kHz 0.01 0.1 1 0.01 0.1 10 Output power POUT 1 (W) Output power ICCQ – VCC (%) THD 800 Total harmonic distortion (mA) ICCQ Quiescent current RL = ∞ 600 400 200 10 POUT (W) THD – f 1000 0 10 20 Power supply voltage VCC 30 VCC = 13.2 V RL = 4 Ω POUT = 5 W 1 1ch 0.1 2ch 4ch 3ch 0.01 10 100 1k Frequency f 10k 100k (Hz) (V) 10 2002-10-30 TA8252H POUT – f GV – f 40 25 GV 15 (dB) THD = 10% 0.8% Voltage gain Output power POUT (W) 35 20 10 5 VCC = 13.2V RL = 4 Ω 0 10 100 1k Frequency f 10k 30 25 20 15 10 VCC = 13.2 V RL = 4 Ω 5 VOUT = 0.775 Vrms (0dBm) 0 10 100k 100 (Hz) Frequency f VNO – Rg VCC = 13.2 V RL = 4 Ω 300 BW = ~20 k 250 Output noise voltage 200 150 100 50 0 10 100 1k 10k Signal source resistance Rg −20 −30 −40 OUT1 −50 OUT4 OUT2 −60 OUT3 −70 100 (Ω) −10 Rg = 620 Ω RL = 4 Ω −30 −40 OUT2→OUT1 −60 100 1k Frequency f 100k (Hz) −20 VCC = 13.2 V VOUT = 0.775 Vrms (0 dBm) Rg = 620 Ω RL = 4 Ω −30 −40 −50 OUT1→OUT2 OUT4→OUT2 OUT3→OUT1 −70 10 10k C.T. – f (OUT2) 0 VCC = 13.2 V VOUT = 0.775 Vrms (0 dBm) −50 1k Frequency f C.T. (dB) −20 (Hz) Rg = 620 Ω RL = 4 Ω −80 10 100k Cross talk Cross talk C.T. (dB) −10 100k VCC = 13.2 V Vrip = 0.775 Vrms (0 dBm) C.T. – f (OUT1) 0 10k R.R. – f −10 Ripple rejection ratio R.R. (dB) VNO (µVrms) 350 1k 10k −60 OUT4 →OUT1 100k −70 10 (Hz) 100 1k Frequency f 11 10k OUT3 →OUT2 100k (Hz) 2002-10-30 TA8252H C.T. – f (OUT3) 0 C.T. – f (OUT4) 0 VCC = 13.2 V RL = 4 Ω C.T. (dB) −20 −10 −30 −40 Cross talk Cross talk C.T. (dB) VOUT = 0.775 Vrms (0 dBm) −10 Rg = 620 Ω OUT2→OUT3 OUT1→OUT3 −50 OUT4→OUT3 −60 −20 VCC = 13.2 V VOUT = 0.775 Vrms (0 dBm) Rg = 620 Ω RL = 4 Ω −30 −40 OUT2→OUT4 OUT1→OUT4 OUT3→OUT4 −50 −60 −70 10 100 1k Frequency f 10k −70 10 100k 100 (Hz) Frequency f PD – POUT Allowable power dissipation PD MAX. PD (W) Power dissipation (W) f = 1 kHz RL = 4 Ω 70 60 VCC = 18V 50 40 13.2V 30 9V 10 0 0 10 20 Output power 30 10k 100k (Hz) PD MAX. – Ta 80 20 1k 40 50 60 POUT/ch (W) 140 (1) 120 (1) INFINITE HEAT SINK RθJC = 0.5 °C/W (2) HEAT SINK 80 (RθHS = 3.5 °C/W) RθJC + RθHS = 4 °C/W 60 (3) NO HEAT SINK RθJA = 31 °C/W 40 100 (2) 20 0 0 (3) 25 50 75 100 125 150 Ambient temperature Ta (°C) 12 2002-10-30 TA8252H Package Dimensions Weight: 9.8g (typ.) 13 2002-10-30 TA8252H RESTRICTIONS ON PRODUCT USE 000707EBF · 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. · 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. · · · The products described in this document are subject to the foreign exchange and foreign trade laws. The information contained herein is presented only as a guide for the applications of our products. No responsibility is assumed by TOSHIBA CORPORATION for any infringements of intellectual property or other rights of the third parties which may result from its use. No license is granted by implication or otherwise under any intellectual property or other rights of TOSHIBA CORPORATION or others. The information contained herein is subject to change without notice. 14 2002-10-30