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| TA8271HQ TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic TA8271HQ Max Power 41 W BTL x 4 ch Audio Power IC The TA8271HQ is 4 ch BTL audio power amplifier for car audio application. This IC can generate more high power: POUTMAX = 41 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 and muting function. 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) = 41 W (typ.) (VCC = 14.4 V, f = 1 kHz, JEITA max, RL = 4 ) : POUTMAX (2) = 37 W (typ.) (VCC = 13.7 V, f = 1 kHz, JEITA max, RL = 4 ) : POUT (1) = 24 W (typ.) (VCC = 14.4 V, f = 1 kHz, THD = 10%, RL = 4 ) : POUT (2) = 21 W (typ.) (VCC = 13.2 V, f = 1 kHz, THD = 10%, RL = 4 ) * * * * * * * Low distortion ratio: THD = 0.02% (typ.) (VCC = 13.2 V, f = 1 kHz, POUT = 5 W, RL = 4 ) Low noise: VNO = 0.18 mVrms (typ.) (VCC = 13.2 V, Rg = 0 , GV = 34dB, BW = 20 Hz~20 kHz) Built-in stand-by switch function (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 : Thermal shut down, over voltage, out to GND, out to VCC, out to out short Operating supply voltage: VCC (opr) = 9~18 V 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 TA8271HQ Block Diagram C5 1 TAB 20 VCC1 6 VCC2 OUT1 (+) 9 C1 11 IN1 PW-GND1 8 OUT1 (-) 7 RL OUT2 (+) 12 IN2 5 RL C1 PW-GND2 2 OUT2 (-) 3 C6 16 AUX IN OUT3 (+) 15 IN3 17 RL C1 PW-GND3 18 OUT3 (-) 19 OUT4 (+) 14 IN4 21 RL C1 PW-GND4 24 OUT4 (-) 23 PRE-GND 13 RIP 10 C2 STBY 4 R2 C7 MUTE2 25 C8 MUTE 22 R1 C4 : 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. C3 2 2004-05-10 TA8271HQ 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 = 8 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) = 8 + 20 + 6 = 34 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 A (typ.) at the stand-by state. VCC ON Power OFF 4 10 k 2VBE to BIAS CUTTING CIRCUIT Control Voltage of pin 4: VSB Stand-by ON OFF Power OFF ON VSB (V) 0~1.5 3~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 TA8271HQ Large current capacity switch BATTERY RELAY BATTERY VCC VCC - Conventional Method - FROM MICROCOMPUTER 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, C4 and C8 and these parts is related the pop noise at power ON/OFF. The series resistance; R1 must be set up less than 5 k. The muting function have to be controlled by a transistor, FET and -COM port which has IMUTE > 50 A ability. ATT - VMUTE 0 -10 I (20 A) IMUTE (OFF) (dB) -20 -30 -40 -50 -60 -70 -80 -90 -100 1.2 1.4 1.6 R1 = 5 k 25 C8 ATT 22 C4 R1 IMUTE A Mute attenuation R1 = 2.2 k VMUTE VCC = 13.2 V Po = 10 W RL = 4 f = 1 kHz 1.8 2.0 2.2 2.4 2.6 2.8 Point A voltage: VMUTE (V) Figure 4 Muting Function Figure 5 Mute Attenuation - VMUTE (V) 4 2004-05-10 TA8271HQ 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 -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. IN OUT (+) OUT (-) AUX AMP -COM AUX-IN 16 -20dB Figure 6 AUX Input 5. 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 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. Current into a speaker Operating point of protector Less than 4 About 1 4 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 2004-05-10 TA8271HQ Maximum Ratings (Ta = 25C) Characteristics Peak supply voltage (0.2 s) DC supply voltage Operation supply voltage Output current (peak) Power dissipation Operation temperature Storage temperature Symbol VCC (surge) VCC (DC) VCC (opr) IO (peak) PD (Note5) Topr Tstg Rating 50 25 18 9 125 -40~85 -55~150 Unit V V V A W C C Package thermal resistance j-T = 1C/W (typ.) (Ta = 25C, 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. Note5: 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 THD GV GV VNO (1) VNO (2) Ripple rejection ratio Cross talk Output offset voltage Input resistance Stand-by current Stand-by control voltage R.R. C.T. VOFFSET RIN ISB VSB H VSB L Mute control voltage (Note6) VM H VM L Mute attenuation 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 19 32 -1.0 40 -150 3.0 0 Typ. 200 41 37 24 21 0.02 34 0 0.20 0.18 50 60 0 30 2 Open 90 0.5 Max 400 0.2 36 1.0 0.42 +150 10 VCC 1.5 V dB dB dB mV k A V mVrms % dB W Unit mA Note6: Muting function have to be controlled by open and low logic, which logic is a transistor, FET and -COM port of IMUTE > 50 A ability. 6 2004-05-10 TA8271HQ Test Circuit 1 TAB 20 VCC1 6 VCC2 OUT1 (+) 9 0.22 F C1 11 IN1 PW-GND1 8 OUT1 (-) 7 RL OUT2 (+) 0.22 F C1 12 IN2 5 RL PW-GND2 2 OUT2 (-) 3 0.22 F C6 16 AUX IN OUT3 (+) 0.22 F C1 15 IN3 17 RL PW-GND3 18 OUT3 (-) 19 OUT4 (+) 0.22 F C1 14 IN4 21 RL PW-GND4 24 OUT4 (-) 23 PRE-GND 13 RIP 10 C2 10 F STBY 4 R2 10 k MUTE2 C7 0.047 F 25 C8 0.1 F MUTE 22 C4 33 F R1 5 k 3900 F : 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. C3 0.1 F C5 7 2004-05-10 TA8271HQ T.H.D - POUT 100 VCC = 13.2 V RL = 4 100 f = 1 kHz RL = 4 T.H.D - POUT (%) (%) Total harmonic distortion T.H.D 10 10 Total harmonic distortion T.H.D 1 10 kHz 1 13.2 V 9.0 V 0.1 100 Hz 0.1 1 kHz 16.0 V 0.01 0.1 1 10 100 0.01 0.1 1 10 100 Output power POUT (W) Output power POUT (W) ICCQ - VCC 400 1 T.H.D - f (%) T.H.D 0.1 OUT3 RL = (mA) VIN = 0 300 ICCQ 200 Total harmonic distortion Quiescent current OUT1, 2, 4 0.01 VCC = 13.2 V RL = 4 Pout = 5 W 0.001 10 100 1k 10 k 100 k 100 0 0 10 20 30 Power supply voltage VCC (V) Frequency f (Hz) 8 2004-05-10 TA8271HQ VNO - Rg 300 0 VCC = 13.2 V -10 -20 -30 -40 -50 -60 -70 10 RL = 4 Rg = 620 Vrip = 0dBm R.R. - f (Vrms) VNO 200 Output noise voltage 150 100 50 0 10 100 1k 10 k Ripple rejection ratio R.R. (dB) VCC = 13.2 V RL = 4 250 BW = 20 Hz~20 kHz 100 k 100 1k 10 k 100 k Signal source resistance Rg () Frequency f (Hz) C.T. - f (OUT1) 0 VCC = 13.2 V -10 RL = 4 VOUT = 0dBm -10 0 VCC = 13.2 V RL = 4 VOUT = 0dBm Rg = 620 C.T. - f (OUT2) (dB) -20 -30 -40 -50 (dB) C.T. Cross talk OUT1 OUT2, 3, 4 Rg = 620 -20 -30 -40 -50 Cross talk C.T. OUT2 OUT1, 3, 4 -60 -70 10 -60 -70 10 100 1k 10 k 100 k 100 1k 10 k 100 k Frequency f (Hz) Frequency f (Hz) C.T. - f (OUT3) 0 VCC = 13.2 V -10 RL = 4 VOUT = 0dBm -10 0 VCC = 13.2 V RL = 4 VOUT = 0dBm Rg = 620 C.T. - f (OUT4) (dB) -20 -30 -40 -50 -60 -70 10 (dB) C.T. Cross talk Rg = 620 -20 -30 -40 -50 -60 -70 10 Cross talk C.T. OUT4 OUT1, 2, 3 OUT3 OUT1, 2, 4 100 1k 10 k 100 k 100 1k 10 k 100 k Frequency f (Hz) Frequency f (Hz) 9 2004-05-10 TA8271HQ GV - f 40 35 70 60 PD - POUT PD (W) (dB) 30 25 20 15 10 5 0 10 16 V 50 40 13.2 V 30 GV Power dissipation Voltage gain 20 9V 10 0 f = 1 kHz RL = 4 0 5 10 15 20 25 VCC = 13.2 V RL = 4 VOUT = 0dBm 100 1k 10 k 100 k Frequency f (Hz) Output power POUT/ch (C) PD MAX -Ta (w) 120 (1) 100 INFINITE HEAT SINK RJC = 1C/W (2) HEAT SINK (RHS = 3.5C/W) (3) 80 (1) 60 RJC + RHS = 4.5C/W NO HEAT SINK RJA = 39C/W Allowable power dissipation PD MAX. 40 20 (3) 0 0 25 50 75 (2) 100 125 150 Ambient temperature Ta (C) 10 2004-05-10 TA8271HQ Package Dimensions Weight: 7.7 g (typ.) 11 2004-05-10 |
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