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TA8254BHQ

Part Number	TA8254BHQ
Manufacturer	Toshiba Semiconductor
Description	45W BTL X 2CH AUDIO POWER AMPLIFIER
Published	Mar 20, 2006
Detailed Description	TA8254BHQ TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic TA8254BHQ Max Power 45 W BTL × 2 ch Audio Power ...
Datasheet	TA8254BHQ PDF File

Overview

TA8254BHQ TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic TA8254BHQ Max Power 45 W BTL × 2 ch Audio Power IC The TA8254BHQ is BTL stereo audio power amplifier for car audio application, especially for 2 Ω load impedance.
It is built-in Stand-by Function, Muting Function, diagnosis circuit output clipping detector and various kind of protections.
Features • High power : POUT (1) = 45 W (typ.
) /channel (VCC = 14.
4 V, f = 1 kHz, THD = 10%, RL = 2 Ω) : POUT (2) = 35 W (typ.
) /channel (VCC = 13.
2 V, f = 1 kHz, THD = 10%, RL = 2 Ω) : POUT (3) = 21 W (typ.
) /channel (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 = 10 W, RL = 4 Ω) Low noise : VNO = 0.
10 mVrms (typ.
) (VCC = 13.
2 V, RL = 4 Ω, Rg = 0 Ω , BW = 20 Hz to 20 kHz) Built-in stand-by function : (with pin set at LOW, power is turned OFF) ISB = 1 µA (typ.
) Built-in output clipping detection and diagnosis circuit : (open collector (active LOW)) Built-in various protection circuits : Thermal shut down, over voltage, OUT → VCC short, OUT → GND short and OUT-OUT short.
Operating supply voltage: VCC (opr) = 9 to 18 V Weight: 4.
0 g (typ.
) • • • • • • 1 2004-09-28 TA8254BHQ Block Diagram VCC C5 7 Clip-det and diagnosis 8 VCC2 9 VCC1 OUT1 (+) C1 2 IN1 RL OUT1 (−) 14 15 C3 RL OUT2 (−) 11 GND1 13 TAB 5 Ripple C2 GND2 12 OUT2 (+) C1 4 10 Pre-GND 3 Stand-by SW 6 MUTE 1 R1 C4 2 2004-09-28 TA8254BHQ 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 = 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...

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TA8254BHQ 45W BTL X 2CH AUDIO POWER AMPLIFIER - Toshiba Semiconductor

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