5W high efficiency charger circuit design for portable audio players

Probe domestic high frequency needle JKT-50L high frequency needle with 3 probes

Photocoupler

Summary:

working principle

The TinySwitch-III flyback power supply converts AC input voltages from 85 VAC to 265 VAC into a single isolated DC output voltage. The power supply output is 5 V, 1 A (5 W) constant voltage / constant current (CV / CC). Typical applications include portable audio players, digital cameras, and other products that require a compact, lightweight AC wall charger.

design feature

• High efficiency (>70% under full load)
• Meets CEC/Energy Star 2008 requirements for efficiency in the load mode (up to 71.5%, requirement 64.5%)
• No-load input low power (<230 mW at 230 VAC AC input)
• Low-voltage drop constant current (CC) detection with temperature compensation
• Compliant with CISPR-22/EN55022 B conducted EMI limits, no Y capacitor required

Charger (5 V, 1 A) circuit design for portable audio players

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