Designing LED driver using top switch

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When we use top switch for LED driver which part of circuit get feedback from output current?
I designed a LED driver with 27V and 0.5A by PI expert. I attached the schematic.
Best Regard

첨부 파일Size
LED_driver.pdf175.3 KB

Hi zahra,
It seems that TOPSwitch does not have a built in constant current mode. You would have to add external circuitry to achieve constant current regulation. I recommend that you use our LED lighting products for your LED driver application. You can check on this link to see which of our products satisfy your needs.