TA8260AH TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic TA8260AH Max Power 40 W BTL × 4CH Audio Power IC The TA8260AH is 4 ch BTL audio power amplifier for car audio application. This IC can generate more high power: POUT MAX = 40 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. Weight: 9.8 g (typ.) Features · High power : POUT MAX (1) = 40 W (typ.) (VCC = 14.4 V, f = 1 kHz, JEITA max, RL = 4 Ω) : POUT MAX (2) = 37 W (typ.) (VCC = 13.7 V, f = 1 kHz, JEITA max, RL = 4 Ω) : POUT (1) = 27 W (typ.) (VCC = 14.4 V, f = 1 kHz, THD = 10%, RL = 4 Ω) : POUT (2) = 22 W (typ.) (VCC = 13.2 V, f = 1 kHz, THD = 10%, RL = 4 Ω) · Built-in clip detector & diagnosis circuit. (pin 3) · 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 = 26dB, BW = 20 Hz~20 kHz) · Built-in stand-by switch function (pin 2) · Built-in muting function (pin 24) · Built-in AUX. amplifier from single input (pin 16) to 2 channels output ; OUT1 and 4 · Built-in junction temperature detection circuit (pin 23) : Pin 23 DC voltage rises at about +5 mV/°C in proportion to junction temperature. · 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 1 2002-03-05 TA8260AH Block Diagram 2 2002-03-05 TA8260AH 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 3 2002-03-05 TA8260AH 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 µA (typ.) at the stand-by state. Control voltage of pin 2: V (SB) Stand-By Power V (SB) (V) ON OFF 0~1.5 OFF ON 3~6 Figure 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 ― Conventional method ― ― Stand-by switch method ― Figure 3 4 2002-03-05 TA8260AH 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 kΩ, we recommend 10 kΩ. The muting function have to be controlled by a transistor, FET and µ-COM port which has IMUTE ≥ 250 µA ability. Terminal 24 must not be pulled up and it shall be controlled by OPEN/LOW. Figure 4 Muting function Figure 5 Mute attenuation−Vmute (V) 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 µ-COM can directly drive the AUX. amplifier. BEEP sound or voice synthesizer signal can be input to pin 16 directly. Figure 6 AUX input 5 2002-03-05 TA8260AH 5. Diagnosis output (pin 3) The diagnosis output terminal of pin 3 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 3. (Application) pin 3: Open collector output (active low) Figure 7 6 2002-03-05 TA8260AH 6. Output clip detection function (pin 3) The output clip detection terminal of pin 3 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 3. (Application) pin 3: Open collector output (active low) Figure 8 (A) Output (AC wave form) (B) Clip detector circuit (internal) (C) Clip DET. terminal (pin 3) Figure 9 7 2002-03-05 TA8260AH 7. Junction temperature detecting pin 23 Using temperature characteristic of a band gap circuit and in proportion to junction temperature, pin 23 DC voltage: V23 rises at about +5 mV/°C temperature characteristic. The relation between V23 at Tj = 25°C and V23x at Tj = x°C is decided by the following expression : In deciding a heat sink size, a junction temperature can be easily made clear by measuring voltage at this pin while a backside temperature of IC was so far measured using a thermocouple type thermometer. Figure 10 8. 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) OUT1 Front OUT2 Rear OUT3 Rear OUT4 Front L-ch (or R-ch) R-ch (or L-ch) 8 AUX. OUT ― ― AUX. OUT 2002-03-05 TA8260AH Maximum Ratings (Ta = 25°C) Characteristics Symbol Rating Unit VCC (surge) 50 V DC supply voltage VCC (DC) 25 V Operating supply voltage VCC (opr) 18 V Peak supply voltage (0.2 s) Output current (peak) IO (peak) 9 A PD (Note 1) 250 W Operating temperature Topr −40~85 °C Storage temperature Tstg −55~150 °C Power dissipation Note 1: Package thermal resistance θj-T = 0.5°C/W (typ.) (Ta = 25°C, with infinite heat sink) Electrical Characteristics (unless otherwise specified, VCC = 13.2 V, f = 1 kHz, RL = 4 Ω, Ta = 25°C) Characteristics Quiescent current Output power Total harmonic distortion Voltage gain Voltage gain ratio Symbol Test Circuit ICCQ ― POUT MAX (1) Test Condition Min Typ. Max Unit VIN = 0 ― 200 400 mA ― VCC = 14.4 V, MAX power ― 40 ― POUT MAX (2) ― VCC = 13.7 V, MAX power ― 37 ― POUT (1) ― VCC = 14.4 V, THD = 10% ― 27 ― POUT (2) ― THD = 10% 20 22 ― THD ― POUT = 5 W ― 0.02 0.2 % GV ― VOUT = 0.775 Vrms (0dBm) 24 26 28 dB dB W ∆GV ― VOUT = 0.775 Vrms (0dBm) −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 (0dBm) 40 50 ― dB Cross talk C.T. ― Rg = 620 Ω, VOUT = 0.775 Vrms (0dBm) ― 70 ― dB VOFFSET ― ― −100 0 100 mV Input resistance RIN ― ― ― 90 ― kΩ Stand-by current ISB ― Stand-by condition ― 2 10 µA VSB H ― Power: on 3.0 ― 6.0 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 (20dBm) at Mute: off. 80 90 ― dB Output noise voltage Output offset voltage Stand-by control voltage Mute control voltage Mute attenuation (Note 2) OPEN mVrms V ― 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 that the Mute control terminal: pin 24 must not be pulled-up. 9 2002-03-05 TA8260AH 10 2002-03-05 TA8260AH 11 2002-03-05 TA8260AH 12 2002-03-05 TA8260AH Test Circuit 13 2002-03-05 TA8260AH Package Dimensions Weight: 9.8 g (typ.) 14 2002-03-05 TA8260AH 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. 15 2002-03-05