Hi all,
I have developed a constant current provider using HV9921 for LED lighting. The output current of HV9921 is limited max to 20mA. At 20 VDC to 75 VDC output current is 15mA constantly. After 75 VDC output current starts increasing around 115VDC input voltage resistor blasted. my current requirement is 20mA constantly from 85 VDC to 220 VDC. can anybody tel me what is the reason for this?
I have developed a constant current provider using HV9921 for LED lighting. The output current of HV9921 is limited max to 20mA. At 20 VDC to 75 VDC output current is 15mA constantly. After 75 VDC output current starts increasing around 115VDC input voltage resistor blasted. my current requirement is 20mA constantly from 85 VDC to 220 VDC. can anybody tel me what is the reason for this?
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