Summary:
working principle
The LinkSwitch-LP flyback power supply shown in Figure 1 converts the AC input voltage from 90 VAC to 265 VAC to a single isolated DC output voltage. The power supply output is 2 V, 1.5 A (3 W) with constant voltage/constant current (CV/CC) characteristics. Typical applications include those that use a single rechargeable battery for an electric hair clipper and a repairer.
Circuit Design of 2 V, 1.5 A Constant Voltage / Constant Current Charger for LNK564PN
design feature
- High efficiency (>60% under full load)
- Low cost, low component count, compact and lightweight, alternative to linear power supply design
- No optocoupler required
- No constant current detection resistor required
- Extremely energy efficient
- Meets CEC/Energy Star 2008 requirements for work mode efficiency (required
- 59%, up to 64%)
- Low input power at no load (less than 300 mW at 230 VAC AC input,
- Requires 500 mW)
- Excellent constant voltage/constant current characteristics at different temperatures
- Compliant with CISPR-22/EN55022 B conducted EMI limit, margin exceeds 8 dBμV
See the PDF document for details (click on the PDF file to download)
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