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LM3421: How to deal with Dim Signal

Part Number: LM3421

Is there a EVM for LM3421 buck application?

If I only use PWM control,how to deal with Dim signal?

Our LED voltage is 7.3V,current 16A,is LM3421 suitable for our LED?


  • Hello,

    The LM3421 is a controller so in theory it can do what you are asking for here.  However for such high power output the external components selection along with thermal management will be important.  

    For PWM dimming please see section 8.3.12 of the data sheet .  Unfortunately, we do not have a BUCK evaluation board for the LM3421. 

    Thanks Tuan