Schematic & Wiring Diagram

TDA1521 / TDA1521Q: 12W Stereo Amplifier

This is a stereo audio amplifier circuit that provides 12W output power on each audio channel. This simple circuit is built on a single integrated circuit of TDA1521 / TDA1521Q, and only supported by few external components.

TDA1521/TDA1521Q is a dual high-fidelity audio amplifier encapsulated in a plastic 9-leads. The device is specially designed for power supply applications (eg, stereo TV and radio). A heatsink is needed to prevent overheating the IC.

TDA1521/TDA1521Q features:

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

This hi-fi stereo power amplifier is designed for mains fed applications. The circuit is designed for both symmetrical and asymmetrical power supply systems. An output power of 2 x 12 watts (THD = 0,5%) can be delivered into an 8 W load with a symmetrical power supply of ± 16 V.

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