20 watt BTL High Audio Power Amplifier

General Descripton:

The AN7161 is a monolithic integrated circuit designed for BTL audio high power amplifier with buikt-in headphone ampliifer. It can be widely applicable to Hi-Fi car stereo and TV sound multiplex output.

Circuit Diagam:

20 watt BTL High Audio Power Amplifier

Datasheet for AN7161:

Dual Audio Power Amplifier Circuit, 7.5W

Description:

The NTE1373 is an integrated circuit designed for use as a 7.5W (16W, 4Ω) power amplifier output with low noise and low distortion suitable for TV sets with multi−sound. Stereo operation is possible due to incorporating two amplifiers on one 12−Lead SIP type chip.

Features:

• Built−In Protection Circuits (Surge, Thermal Protection, etc.)
• Automatic Operating Point Stabilizer Circuit
• Low Distortion, Low 1/f Noise
• Low Shock Noise from Power ON/OFF Operation
• Better Channel Separation
• Few External Components Required

Dual Audio Power Amp 5.3W/Ch. NTE1371

Features:
Built−in Protector Circuits (for surge and thermal, etc.)
Built−in Automatic Operating Point Stabilized Circuit
Low Distortion, Low L/F Noise
Small Transient Nosie at Power ON/OFF Switching
Good Channel Separation
Few External Components

Pin connection:

Dual Audio Power Amp 5.3W/Ch. NTE1371

Supply Voltage (Note 1), VCC . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20V
Peak Supply Voltage (Note 2), VSURGE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40V
Total Current, ICC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4A
Power Dissipation (TA = +30°C), PD . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30W
Operating Temperature, Topr . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . . . −30° to +75°C

Storage Temperature Range, Tstg . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . −55° to +150°C

AN7158N Dual 7.5W Audio Power Amplifier Circuit

Overview
The AN7158N is an integrated circuit designed for power amplifier of 7.5W (16V, 4Ω) output with low noise and low distortion, and it suits TV set with multi-sound. Stereo operation is enabled due to incorporating two amplifiers on one chip. 12-pin SIL package enabled compact and high-densely mounted set. 
Circuit Diagram:

AN7158N Dual 7.5W Audio Power Amplifier Circuit

Datasheet AN7158N: 

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100W Subwoofer Amplifier Circuit

Description for Subwoofer Amplifier Circuit:

This is a circuit diagram designed with transitors, designed specially for subwoofer amplifiers, and can produce a power output 100W. 

Circuit diagram for  Subwoofer Amplifier Circuit:

100W Subwoofer Amplifier Circuit

40 Watt Audio Amplifier Circuit

General Description

The TA8277H is 4 ch BTL audio power amplifier for car audio  application.  This IC can generate more high power: POUTMAX = 43 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.

Circuit Diagram:

40 Watt Audio Amplifier Circuit

Datasheet for TA8277: Download