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its a drawing error. my doubt remains ..according to block diagram there is a delay to OVP, UVP ..a possible reason is mosfets bad drive . I check mosfets for damage but nothing found. I replace them , but chip remains in shutdown. maybe inductance of power inductors are wrong. unfortunately...
no output with a light load. pcb was replicated from AN1292 Texas application.
below are some components that I use in demo board.
LM5642 , TEXAS INSTR. vendor FARNELL code : 8181772
PSMN4R5-40BS , NEXPERIA vendor FARNELL, code : 2114728
RLF12560T-4R2N100 , TDK vendor FARNELL , code : 1669981
Hello to all !
getting some info from AN1292 (Texas application for LM5642 ),I made dc-dc converter to use at a solar controller. At test with no load the converter not work . no output, no pulses 200khz to drive mosfets. it seems to be disable ( on/ss pins below 2volts ). I was checked...
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