Max Duty Cycle of LM3409HV

takahiko yokota

Mastermind 7135 points

Other Parts Discussed in Thread: LM3409HV

My customer will use LM3409HV under conditions.

When they use it in worst case, the duty cycle is 100%.

Could you tell me this devise's max duty cycle?

LED

・Vin：60V(ripple is ±5V)

・VF：typ55V

・IF：360mA

・Fsw：150~200kHz

Best regards

Yokota

over 8 years ago

0 Dominic Leone over 8 years ago

Prodigy 120 points

If you have 100% duty cycle you just simply have enabled the chip. so 100% is max.

0 Clinton Jensen over 8 years ago

TI__Mastermind 25500 points

It is a P-channel controller so it is capable of 100% duty cycle, but depending on the actual voltages and the PFET Rds(on) the current may not be in regulation (dropout condition like an LDO).

Thanks,

Clint

Power management

Power management forum

Max Duty Cycle of LM3409HV