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TA8258H

Toshiba
Part Number TA8258H
Manufacturer Toshiba
Description Dual Audio Power Amplifier
Published Mar 18, 2008
Detailed Description www.DataSheet4U.com TA8258H TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic TA8258H Dual Audio Power Ampl...
Datasheet PDF File TA8258H PDF File

TA8258H
TA8258H

Overview
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 www.
DataSheet4U.
com 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.
DataSheet4U.
com TA8258H 2.
Muting This product has an excellent muting system.
Audio muting This IC is possible to make audio muting operation by using 11 pin muting terminal.
Figure 3 shows the equivalent circuit in the muting circuit.
By reducing the voltage of 11 pin to 2.
8 V or less, Q1 will be ON.
Also the base voltage of Q2 in the differential circuit that has Q2 and Q3 will be down.
When Q2 is OFF, I2 and I5 dummy circuits will be operated, and it will shut down the input.
However, the bias ci...


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