3 4 W power amplifier schematic

The schematic above is amplifier based on ic TA7211P or TA7212P , circuit above using OT transformer as a booster amplifier again. The amplifier suitable used on outside / field, because by using a transformer OT is identical to the PA amplifier.

Part List :

R  = 1K , 10R , 3K3

C  = 1uF , 10uF , 1n , 68u, 3u3, 2n2 x 2, 100u 

IC = TA 7211P / TA7212P

Technical information :

Max Vcc = 15 VDC

Min Vcc  = 4 VDC

Po            = 3,4 W

Rl            = 8 Ohm

Icco         = 16 mA

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2 x 12 W hi fi audio power amplifier

GENERAL DESCRIPTION:

The TDA1521/TDA1521Q is a dual hi-fi audio power amplifier encapsulated in a 9-lead plastic power package.The device is especially designed for mains fed applications (e.g. stereo tv sound and stereo radio).

Features:

• Requires very few external components
• Input muted during power-on and off (no switch-on or switch-off clicks)
• Low offset voltage between output and ground
• Excellent gain balance between channels
• Hi-fi according to IEC 268 and DIN 45500
• Short-circuit-proof
• Thermally protected

Circuit diagram:

2 x 12 W hi-fi audio power amplifier with symmetrical power supply

2 x 12 W hi-fi audio power amplifier with asymmetrical power supply

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1 to 4 W audio power amplifier

General Description:

The TDA1015 is a monolithic integrated audio amplifier circuit in a 9-lead single in-line (SIL) plastic package. The device is especially designed for portable radio and recorder applications and delivers up to 4 W in a 4 Ω load impedance. The very low applicable supply voltage of 3,6 V permits 6 V applications. 1 to 4 W audio power amplifier

Special features:

• single in-line (SIL) construction for easy mounting
• separated preamplifier and power amplifier
• high output power
• thermal protection
• high input impedance
• low current drain
• limited noise behaviour at radio frequencies

Circuit Diagram:

1 to 4 W audio power amplifier circuit diagram

Datasheet for TDA1015: Download

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