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TA8262H
TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic
TA8262H
Max Power 43 W BTL x 4CH Audio Power IC
The TA8262H is 4 ch BTL audio power amplifier for car audio application. This IC can generate more high power: POUT MAX = 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, Clip detector, and diagnosis circuit. Additionally, the AUX. amplifier is built-in, it can make the beep signal etc. output to 2 channels (OUT1 and 4). It contains various kind of protectors for car audio use.
Features
* High power : POUT MAX (1) = 43 W (typ.) (VCC = 14.4 V, JEITA max, RL = 4 ) : POUT MAX (2) = 40 W (typ.) (VCC = 13.7 V, JEITA max, RL = 4 ) : POUT (1) = 28 W (typ.) (VCC = 14.4 V, f = 1 kHz, THD = 10%, RL = 4 ) : POUT (2) = 24 W (typ.) (VCC = 13.2 V, f = 1 kHz, THD = 10%, RL = 4 ) * * Built-in clip detector & diagnosis circuit. (pin 25) Low distortion ratio : THD = 0.02% (typ.) (VCC = 13.2 V, f = 1 kHz, POUT = 5 W, RL = 4 ) * Low noise : VNO = 0.10 mVrms (typ.) (VCC = 13.2 V, Rg = 0 , GV = 26dB, BW = 20 Hz~20 kHz) * * * * * Built-in stand-by switch function (pin 2) Built-in muting function (pin 24)
Weight: 9.8 g (typ.)
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) = 9~18 V
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Block Diagram
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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.
Figure 1 Block diagram
The voltage gain of Amp. 1 : GV1 = 0dB The voltage gain of Amp. 2A, B : GV2 = 20dB The voltage gain of BLT Connection : GV (BTL) = 6dB Therefore, the total voltage gain is decided by expression below. GV = GV1 + GV2 + GV (BTL) = 0 + 20 + 6 = 26dB
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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 3 VBE (typ.), and the Power Supply current is about 2 A (typ.) at the stand-by state.
Control voltage of pin 2: V (SB)
Stand-By ON OFF Power OFF ON V (SB) (V) 0~1.5 3~VCC
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
Figure 2 With pin 2 set to High, power is turned ON
Conventional method
Stand-by switch method
Figure 3
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3. Muting function (pin 24)
By means of controlling pin 24 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 15 k, we recommend 10 k. The muting function have to be controlled by a transistor, FET and -COM port which has IMUTE 250 A ability. Terminal 24 must not be pulled up and it shall be controlled by OPEN/LOW.
Figure 4 Muting function 4. AUX. input (pin 16)
Figure 5 Mute attenuation-Vmute (V)
The pin 16 is for input terminal of AUX. amplifier. The total gain is 0dB by using of AUX. amplifier. Therefore, the -COM can directly drive the AUX. amplifier. BEEP sound or voice synthesizer signal can be input to pin 16 directly.
Figure 6 AUX input
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5. Diagnosis output (pin 25)
The diagnosis output terminal of pin 25 has open collector output structure on chip as shown in Figure 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)
pin 25: Open collector output (active low)
Figure 7
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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 8. 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 8. In case of being unused this function, use this IC as open connection on pin 25. (Application)
pin 25: Open collector output (active low)
Figure 8
(A) Output (AC wave form)
(B) Clip detector circuit (internal)
(C) Clip DET. terminal (pin 25)
Figure 9
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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 OUT3, 4 L-ch (or R-ch) 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 OUT2 OUT3 OUT4 Front Rear Rear Front L-ch (or R-ch) AUX. OUT AUX. OUT
R-ch (or L-ch)
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Maximum Ratings (Ta = 25C)
Characteristics Peak supply voltage (0.2 s) DC supply voltage Operating supply voltage Output current (peak) Power dissipation Operating temperature Storage temperature Symbol VCC (surge) VCC (DC) VCC (opr) IO (peak) PD (Note 1) Topr Tstg Rating 50 25 18 9 250 -40~85 -55~150 Unit V V V A W C C
Note 1: Package thermal resistance j-T = 0.5C/W (typ.) (Ta = 25C, with infinite heat sink)
Electrical Characteristics
Characteristics Quiescent current
(unless otherwise specified, VCC = 13.2 V, f = 1 kHz, RL = 4 , Ta = 25C)
Symbol 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 GV VNO (1) VNO (2) R.R. C.T. VOFFSET RIN ISB VSB H VSB L VM H VM L ATT M Test Circuit VIN = 0 VCC = 14.4 V, MAX power VCC = 13.7 V, MAX power VCC = 14.4 V, THD = 10% THD = 10% POUT = 5 W VOUT = 0.775 Vrms (0dBm) VOUT = 0.775 Vrms (0dBm) Rg = 0 , DIN45405 Rg = 0 , BW = 20 Hz~20 kHz frip = 100 Hz, Rg = 620 Vrip = 0.775 Vrms (0dBm) Rg = 620 , VOUT = 0.775 Vrms (0dBm) Stand-by condition Power: on Power: off Mute: off Mute: on, R1 = 10 k Mute: on, VOUT = 7.75 Vrms (20dBm) at Mute: off. 0 80 Test Condition Min 22 24 -1.0 40 -100 3.0 0 Typ. 200 43 40 28 24 0.02 26 0 0.12 0.10 50 65 0 90 2 OPEN 90 0.5 Max 400 0.2 28 1.0 0.35 100 10 VCC 1.5 % dB dB mVrms dB dB mV k A V V dB W Unit mA
Mute control voltage Mute attenuation
(Note 2)
Note 2: Muting function have to be controlled by open and Low Logic, which Logic is a transistor, FET and -COM port of IMUTE 250 A ability. This means that the Mute control terminal: pin 24 must not be pulled-up.
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Test Circuit
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Package Dimensions
Weight: 9.8 g (typ.)
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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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