2.75W USB charger with LNK613DG design, including circuit diagram, PCB layout, PCB board, component list
Summary:
This report describes a 2.78 W constant voltage/constant current (CV/CC) universal input charging power adapter that is used in cell phones or other similar USB chargers. This power adapter is designed with the LNK613DG device of the inkSwitch-II series. This reference design contains a complete power specification for designing a power adapter, detailed circuit diagrams, bill of materials, and test data with important performance.
design feature
- With innovative control concepts, it is possible to achieve a low component count and a very low cost solution.
- Program
- Primary side control eliminates secondary side controllers and optocouplers
- Constant pressure (CV) accuracy: ± 5%
- Constant current (CC) accuracy: ±10%
- Overheat protection with hysteresis recovery ensures PCB temperature under all conditions
- In a safe range
- Automatic restart: output short circuit and open loop protection
- Extremely energy efficient
- Average efficiency over the entire load range: 74% (Energy Star 2.0 requires 64%)
- No-load input energy consumption: less than 40 mW at 230 VAC input
- Easily meet the following standard requirements:
- Class B Conducted EMI Requirements for EN55022 and CISPR-22 (EMI Margin >10 dBμV)
- IEC 61000-4-5 Level 3 AC Surge and ESD withstand
- Meets <5 mA battery discharge requirements
2.75W USB Charger PCB Physical Map
2.75W USB charger circuit diagram
2.75W USB Charger PCB Layout
2.75W USB Charger Component List
See the uploading documentation for details (click to download)
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