Dual Audio Power Amplifier
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TA8258H
TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic
TA8258H
Dual Audio Power Ampl...
Description
www.DataSheet4U.com
TA8258H
TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic
TA8258H
Dual Audio Power Amplifier
The TA8258H is dual audio power amplifier for consumer applications. This IC provides an output power of 20 watts per channel (at VCC = 37 V, f = 1kHz, THD = 10%, RL = 8 Ω). It is suitable for power amplifier of music center.
Features
· · · · · · · · High output power: Pout = 20 W/channel (Typ.) (VCC = 37 V, RL = 8 Ω, f = 1 kHz, THD = 10%) Low noise: Vno = 0.14 mVrms (Typ.) (VCC = 37 V, RL = 8 Ω, GV = 34dB, Rg = 10 kΩ, BW = 20 Hz~20 kHz) Very few external parts. Built in audio muting circuit. Built in thermal shut down protector circuit. Built in output shifted to GND protection circuit. (AC short) Available for using same PCB layout with: TA8200AH, TA8211AH, TA8216H Operation supply voltage range (Ta = 25°C) : VCC (opr) = 15~42 V Weight: 4.04 g (typ.)
1
2002-02-13
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TA8258H
Block Diagram
VCC 6 Ripple Filter IN1 AMP1 5 3 1 9 VCC
IN1
4
OUT1
7 R RL
400 W Pre-GND 400 W
20 kW PW-GND 10 20 kW AMP2 12
C C R OUT2
RL
IN2
2 IN2 Mute. TC 8 Mute 11
Application Information
1. Voltage gain
The closed loop voltage gain is determined by R1, R2.
Input
R + R2 (dB) G V = 20 log 1 R2
4/2 5/1 R2 400 W R1 20 kW
Output
7/12
20 kW + 400 W = 20log 400 W = 34 (dB) R + R2 + R3 = 20 log 1 (dB) R2 + R3
Input
Figure 1
GV
When R3 = 220 W GV ~ - 30 (dB) is given.
4/2 R3 5/1 R2 400 W R1 20 kW
Output
7/12
Figure 2
2
2002-02-13
www.DataShe...
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