2.75W constant voltage/constant current general input charger power supply circuit

Published:2011/6/20 2:39:00 Author:TaoXi | Keyword: 2.75W, constant voltage, constant current, general input charger, power supply | From:SeekIC

The 2.75W constant voltage/constant current general input charger power supply circuit is as shown in the figure, this design uses the Power Integrations's LinkSwitch series product LNK613DG. This design is very suitable for the cellphone or the USB charger applications such as the cell phone battery charger, the USB charger and the constant pressure/constant current applications. In this design, the diodes D1-D4 rectify the AC input, the capacitance C1 and C2 filter the DC input. The π type filter is composed of the L1, C1 and C2 to attenuate the differential mode conduction EMI noises. The RCD-R ground-clamp circuit is composed of the D5, R2, R3 and C3, it can be used to limit the drain voltage peak which is caused by the leakage inductance.



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