TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic
TA8272H
Max Power 43 W BTL × 4 ch Audio Power IC
The TA8272H is 4 ch BTL audio power amplifier for car audio application.
This IC can generate more high power: POUTMAX = 43 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, and diagnosis circuit which can detect output to VCC/GND short, output offset voltage and over voltage input mode.
Additionally, the AUX amplifier and various kind of protector for car audio use is built-in.
Weight: 7.7 g (typ.)
Features
· High power : POUTMAX (1) = 43 W (typ.)
(VCC = 14.4 V, f = 1 kHz, JEITA max, RL = 4 Ω) : POUTMAX (2) = 40 W (typ.)
(VCC = 13.7 V, f = 1 kHz, JEITA max, RL = 4 Ω) : POUT (1) = 28 W (typ.)
(VCC = 14.4 V, f = 1 kHz, THD = 10%, RL = 4 Ω) : POUT (2) = 24 W (typ.)
(VCC = 13.2 V, f = 1 kHz, THD = 10%, RL = 4 Ω)
· Built-in diagnosis circuit (pin 25) · Low distortion ratio: THD = 0.02% (typ.)
(VCC = 13.2 V, f = 1 kHz, POUT = 5 W, RL = 4 Ω)
(VCC = 13.2 V, Rg = 0 Ω, GV = 26dB, BW = 20 Hz~20 kHz)
· Low noise: VNO = 0.10 mVrms (typ.) · Built-in stand-by switch function (pin 4) · Built-in muting function (pin 22)
· Built-in AUX amplifier from single input to 4 channels output (pin 16) · 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) = 9~18 V
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TA8272H Block Diagram
C5 C3 RL RL RL RL : PRE-GND : PW-GND 1TAB20VCC16VCC2OUT1 (+)9C111 IN1 PW-GND18OUT1 (-)7OUT2 (+)12 IN2 5C1PW-GND22OUT2 (-)3C616 AUX IN OUT3 (+)15 IN3 17C1PW-GND318OUT3 (-)19OUT4 (+)14 IN4 21C1PW-GND424OUT4 (-)23PRE-GND 13 DIAGNOSISRIP MUTESTBYOUT 10 C242522R1C4
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TA8272H 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. 2AAmp. 1Input
Amp. 2BFigure 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 mA (typ.) at the stand-by state.
VCC ONPowerOFF410 kW» 2VBE to BIAS CUTTING CIRCUITControl Voltage of pin 4: VSB
Stand-by Power VSB (V)
ON OFF 0~1.5 OFF ON 3~VCC
Figure 2 With pin 4 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
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TA8272H
Large current capacity switchBATTERY VCC VCC– Conventional Method – FROM MICROCOMPUTERRELAY
BATTERY Small current capacity switchBATTERY Stand-By VCC DIRECTLY FROM MICROCOMPUTERBATTERY Stand-ByVCC– Stand-by Switch Method – Figure 3
3. Muting Function (pin 22)
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 kW.
The muting function have to be controlled by a transistor, FET and m-COM port which has IMUTE > 250 mA ability.
Terminal 22 must not be pulled up and it shall be controlled by OPEN/LOW.
2010 kW 5 kW
ATT – VMUTE
Mute attenuation ATT (dB) 0-20-40-60-80-10000.40.811.2VCC = 13.2 V Po = 10 W RL = 4 W f = 1 kHz BW = 400 Hz~30 kHz1.6 2 2.4 2.8 3I (100 mA) IMUTE (OFF)24C4 R1 A IMUTE VMUTE Point A voltage: VMUTE (V)
Figure 4 Muting Function
Figure 5 Mute Attenuation - VMUTE (V)
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TA8272H 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. Therefore, the m-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.
20dB AMP.INOUT (+)
OUT (-)
m-COMAUX-INAUX AMP 16-20dB 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 transistor (Q1) or (Q2) 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.
5 V25OUTPUT OFFSET VOLTAGE DETECTOR OUTPUT SHORT PROTECTOR OVER VOLTAGE PROTECTOR 5 kW Q25 VQ1GNDt Q1 is turned on Q2 is turned on pin 25: Open collector output (active low)
Figure 7 Self Diagnosis Output
5.1
In Case of Shorting Output to VCC/GND or Over Voltage Power Supplied
NPN transistor (Q1) is turned on.
Threshold of over voltage protection: VCC = 22 V (typ.)
5 V 25 m-COM LED/LCDALARM (Flashing) (Announcement from a speaker.) (Relay → OFF)
REGULATOR → OFFMEMORY(Count and record)Figure 8 Application 1
5.2 In Case of Shorting Output to Output
NPN transistor (Q1) is turned on and off in response to the input signal voltage.
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TA8272H 5.3
In Case of Appearing Output Offset Voltage by Generating a Large Leakage Current on the Input Capacitor etc.
NPN transistor (Q2) is turned on while the inverted output voltage level become less than the threshold level of output offset voltage detector.
VDC voltage of (+) Amp (at leak)VCC/2 (normal DC voltage) Vref
Leak or short tElec. Vol. Vref/2Vbias 25A 5 VL.P.F. B To CPU
DC voltage of (-) Amp (at leak)Offset voltage (at leak) *: It is possible to detectthe abnormal output offset which is appeared by the large leakage of the input capacitor atVref/2 > Vbias (about 1.4 V)
Figure 9 Application and Detection Mechanism
(-) Amp outputVCC/2
Threshold level
GNDt
Voltage of point (A)GNDt
Voltage of point (B)GNDt
Figure 10 Wave Form
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TA8272H Maximum Ratings (Ta = 25°C)
Characteristics Symbol Rating Unit Peak supply voltage (0.2 s) DC supply voltage Operation supply voltage Output current (peak) Power dissipation Operation temperature Storage temperature
VCC (surge)
50 V VCC (DC) 25 V VCC (opr) 18 V IO (peak) PD (Note1)Topr Tstg
9 A 125
W
-40~85 °C -55~150 °C Note1: Package thermal resistance qj-T = 1°C/W (typ.) (Ta = 25°C, with infinite heat sink)
Electrical Characteristics
(unless otherwise specified VCC = 13.2 V, f = 1 kHz, RL = 4 W, Ta = 25°C)
Test
Characteristics Symbol Circuit
Quiescent current
ICCQ POUT MAX (1)
Output power
POUT MAX (2)POUT (1) POUT (2)
Total harmonic distortion Voltage gain Voltage gain ratio Output noise voltage Ripple rejection ratio Cross talk
Output offset voltage Input resistance Stand-by current Stand-by control voltage
THD GV DGV VNO (1) VNO (2) R.R. C.T. VOFFSET RIN ISB VSB H VSB L
(Note2)
VM H VM L ATT M
¾ ¾ ¾ ¾
VIN = 0
VCC = 14.4 V, max Power VCC = 13.7 V, max Power VCC = 14.4 V, THD = 10%
Test Condition
Min
Typ.
Max
UnitmA ¾ 200 400¾ 43 ¾ ¾ 40 ¾ ¾ 28 ¾ 22
24
¾
W
¾ THD = 10% ¾ ¾ ¾
POUT = 5 W
VOUT = 0.775 Vrms (0dBm) VOUT = 0.775 Vrms (0dBm)
¾ 0.02 0.2 % dB -1.0 0 1.0 ¾ 0.12 ¾ ¾ 0.10 0.35
mVrms
24
26
28
¾ Rg = 0 W, DIN45405
¾ Rg = 0 W, BW = 20 Hz~20 kHz¾ ¾ ¾ ¾
frip = 100 Hz, Rg = 620 W
Vrip = 0.775 Vrms (0dBm) Rg = 620 W
VOUT = 0.775 Vrms (0dBm)
¾ ¾
40 50 ¾ dB ¾ 65 ¾ dB -150 0 150¾ 90 ¾
mV kW
¾ Stand-by condition ¾ Power: ON ¾ Power: OFF ¾ Mute: OFF ¾ ¾
¾ 2 10 mA 3.0 0
¾
VCC
V ¾
¾ 1.5 Open
Mute control voltage
Mute: ON, R1 = 10 kW 0 ¾ 0.5 V Mute: ON,
VOUT = 7.75 Vrms (20dBm) at Mute: OFF.
80 90 ¾ dB Mute attenuation
Note2: Muting function have to be controlled by open and low logic, which logic is a transistor, FET and m-COM port
of IMUTE > 250 mA ability.
This means than the mute control terminal : pin 22 must not be pulled-up.
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TA8272H Test Circuit
3900 mF C3 0.1 mF RL RL RL RL : PRE-GND : PW-GND C5 OUT1 (+)0.22 mFC111 IN1 PW-GND18OUT1 (-)79OUT2 (+)0.22 mFC112 IN2 PW-GND22OUT2 (-)35OUT3 (+)0.22 mFC115 IN3 PW-GND318OUT3 (-)1917OUT4 (+)0.22 mFC114 IN4 PW-GND424OUT4 (-)PRE-GND 23212210 kW R1 C4 1 mF 1TAB20VCC16VCC20.22 mF C616 AUX IN13 DIAGNOSISRIP MUTESTBYOUT 10 10 mF C2 425
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TA8272H
T.H.D – POUT
1005030VCC = 13.2 V RL = 4 W 1 ch drive 1005030f = 1 kHz RL = 4 W 1 ch drive 13.2 V
T.H.D – POUT
Total harmonic distortion T.H.D (%) 10 Total harmonic distortion T.H.D (%) 1053VCC = 9.0 V 10.50.316.0 V 0.10.050.03 53f = 10 kHz0.50.30.10.050.03100 Hz 0.010.1
1 kHz 0.5 10 35 50 0.3 1 30 100
0.010.1
0.30.5135 10 30 50 100
Output power POUT (W) Output power POUT (W)
400RL = ¥ ICCQ – VCC
10
T.H.D – f
Total harmonic distortion T.H.D (%) VCC = 13.2 V RL = 4 W POUT = 5 W Quiescent current ICCQ (mA) 3001 2000.110000 10 20 30
0.0110
1001 k10 k 100 k
Power supply voltage VCC (V)
Frequency f (Hz)
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TA8272H
300VCC = 13.2 V RL = 4 W BW = ~20 k VNO – Rg
0
VCC = 13.2 V -10-20-30R.R. – f
Output noise voltage VNO (mVrms) Ripple rejection ratio R.R. (dB) 250Vrip = 0.775 Vrms (0dBm) Rg = 620 W RL = 4 W 200 -40-50-60-700
100
1 k
10 k
100 k
1501005000 100 1 k10 k 100 k
Singnal source resistance Rg (9)
Frequency f (Hz)
0VCC = 13.2 V -10-20-30C.T. – f (OUT1)
0
C.T. – f (OUT2)
VCC = 13.2 V -10VOUT = 0.775 Vrms (0dBm) Rg = 620 W -20-30-40OUT2 ® OUT3, 4-50-60-70OUT2 ® OUT1 OUT2 ® OUT3, 4 RL = 4 W VOUT = 0.775 Vrms (0dBm) RL = 4 W Cross talk C.T. (dB) Cross talk C.T. (dB) Rg = 620 W -40OUT1 ® OUT3, 4 -50OUT1 ® OUT2 -60-70OUT1 ® OUT4OUT1 ® OUT2, 3 0 100 1 k10 k 100 k01001 k10 k 100 k
Frequency f (Hz) Frequency f (Hz)
0VCC = 13.2 V -10-20-30C.T. – f (OUT3)
0
C.T. – f (OUT4)
VCC = 13.2 V -10VOUT = 0.775 Vrms (0dBm) Rg = 620 W -20-30-40OUT4 ® OUT1, 2-50-60-70OUT4 ® OUT3RL = 4 W VOUT = 0.775 Vrms (0dBm) RL = 4 W Cross talk C.T. (dB) Cross talk C.T. (dB) Rg = 620 W -40-50-60-70OUT3 ® OUT1, 2 OUT3 ® OUT4 OUT3 ® OUT1, 2 OUT3 ® OUT40 100 1 k10 k 100 k01001 k10 k 100 k
Frequency f (Hz) Frequency f (Hz)
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TA8272H
40353025GV – f
70605040
PD – POUT
Power dissipation PD (W) Voltage gain GV (dB) 16 V 13.2 V 30209 V10RL = 4 W 005
10
15 20 25
f = 1 kHz 20151050VCC = 13.2 V RL = 4 W VOUT = 0.775 Vrms (0dBm)0
100
1 k
10 k
100 k
Frequency f (Hz)
Output power POUT/ch (C)
120PD MAX – Ta
① INFINITE HEAT SINK Rq HS = 1°C/W Rq HS + RqHC = 4.5°C/W RqJA = 39°C/W ② HEAT SINK (RqHS = 3.5°C/W) ③ NO HEAT SINK ① MAX (W) Allowable power dissipation PD 10080604020③ 00
25
②50 125 75100 150
Ambient temperature Ta (°C)
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TA8272H Package Dimensions
Weight: 7.7 g (typ.)
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TA8272H
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.
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