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Forum Post: RE: question about UCD3138 loop control?

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hi Brandon

i used UCD3138 designed a HSFB in our company project.

it is topology is  interlocked HSFB, power 1500W, input 40~60V, output 30V.

when occur OCP, and restarted, the load switch from full load to empty load, the VOUT will overshoot once, and only once, next switch will ok!

in my program, i think the CC to CV code have a problem, but i added the code in IDLE state( the code below), The problempersists!

 

       LoopMuxRegs.DPWMMUX.bit.DPWM0_FILTER_SEL =0; //

       LoopMuxRegs.DPWMMUX.bit.DPWM1_FILTER_SEL =0; //

       LoopMuxRegs.DPWMMUX.bit.DPWM2_FILTER_SEL =0; //

       LoopMuxRegs.DPWMMUX.bit.DPWM3_FILTER_SEL =0; //

       Filter0Regs.FILTERCTRL.bit.KI_STALL =0;

 


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