DatasheetsPDF.com

TA8271HQ Dataheets PDF



Part Number TA8271HQ
Manufacturers Toshiba
Logo Toshiba
Description Max Power 41W BTL x 4-Ch Audio Power IC
Datasheet TA8271HQ DatasheetTA8271HQ Datasheet (PDF)

TA8271HQ TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic TA8271HQ Max Power 41 W BTL × 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 pr.

  TA8271HQ   TA8271HQ


Document
TA8271HQ TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic TA8271HQ Max Power 41 W BTL × 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 Ω) : POUTMAX (2) = 37 W (typ.) (VCC = 13.7 V, f = 1 kHz, JEITA max, RL = 4 Ω) : POUT (1) = 24 W (typ.) (VCC = 14.4 V, f = 1 kHz, THD = 10%, RL = 4 Ω) : POUT (2) = 21 W (typ.) (VCC = 13.2 V, f = 1 kHz, THD = 10%, RL = 4 Ω) • • • • • • • Low distortion ratio: THD = 0.02% (typ.) (VCC = 13.2 V, f = 1 kHz, POUT = 5 W, RL = 4 Ω) Low noise: VNO = 0.18 mVrms (typ.) (VCC = 13.2 V, Rg = 0 Ω, 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 µA (typ.) at the stand-by state. VCC ON Power OFF 4 10 kΩ ≈ 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 kΩ. The muting function have to be controlled by a transistor, FET and µ-COM port which has IMUTE > 50 µA ability. ATT – VMUTE 0 −10 I (20 µA) IMUTE (OFF) (dB) −20 −30 −40 −50 −60 −70 −80 −90 −100 1.2 1.4 1.6 R1 = 5 kΩ 25 C8 ATT 22 C4 R1 IMUTE A Mute attenuation R1 = 2.2 kΩ VMUTE VCC = 13.2 V Po = 10 W RL = 4 Ω 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 µ-COM can directly drive the AUX amplifier. BEEP sound or voice synthesizer signal can be input to pin 16 direc.


TA8271H TA8271HQ EVF31H-035


@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site.
(Privacy Policy & Contact)