Circuit design of 20W continuous (43W peak) speaker power supply

Summary:

The isolated flyback converter is designed around the PKS606PN (U1) of the PeakSwitch product line. Choosing a P-packaged device (8-pin DIP) minimizes the cost and size of the heat sink for peak power output.

design feature

• The peak output power is greater than 2 times the continuous output power, and the amplifier has no distortion.
• Universal input voltage range for worldwide use
• High efficiency (>79%) across the entire input range
• Meet EN55022 B Conducted EMI Limit
• Auto-restart feature allows long-term short-circuit output
• Thermal shutdown power supply and amplifier

Circuit diagram of 20W continuous (43W peak) speaker power supply

See the uploading documentation for details (click to download)

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