Power one TOPSwith-HX系列开关电源设计方

Transformer T1 uses a split two layer primary winding which is wrapped around the bias winding and the secondary winding. This minimizes leakage inductance and primary winding capacitance to improve no-load and standby performance.

To minimize no load consumption, the bias winding turns are selected such that under worst case conditions of load and line the bias voltage is 8 V.

Option:

Using a TLV431 (U3) reduces minimum cathode current for regulation from 400 μA to 55 μA and would remove the need for R15. This would save an additional 10 mW from no-load requirement.

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本文关键字：开关电源  Power  电子技术，电工技术 - 电子技术