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LM3509D LED Driver

Other Parts Discussed in Thread: LM3509

Dear all, 

I will use LM3509 such as attached image. 

I can't find minimum LED Q'ty per port in data sheet. 

Is there a problem? (Condition, Main Port : LED 1[EA] , Sub/FB : LED 4[EA] , SET Pin=12KOHM, 20m[mA]

Thanks