This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

LM3421: RLIM参数问题

Part Number: LM3421

我用LM3421设计一个LED驱动,12V输入,85W功率,7串灯珠

关于Rlim有几个问题请教一下

1.规格书没有Rlim计算公式,请教下Rlim应该如何取值

2.我遇到一个奇怪的问题,如附件电路,Rlim我用一颗单颗0R025/1%/2W的电阻,功率是85W;用两颗0R05/1%/2W的电阻功率只有80W,看Rlim上电流电压又没有达到设置的限流值。

3.之前还遇到一个情况,比如0R030的限流电阻功率OK,70W,改小限流电阻后功率反倒变小了

多多指教,谢谢

GR-X7PRO-V1_1.pdfLM3421参数计算 - boost - X7PRO-7TX5050W20.xlsx