constant current load SMPS

Carlos Silva85

Other Parts Discussed in Thread: LM5116, LM5085

Hi,

I need a buck PWM controller capable of operating up to 100V with a 100% duty cycle.

This converter must be capable of operating on peak to peak current limit (constant current source) with duty cycle from 0 to 100%

Is there any recommended part?

over 6 years ago

0 Nick Jakse49 over 6 years ago

TI__Expert 4155 points

Carlos,

I think your best bet would be the LM5116 which can handle 100V in and has a 98% maximum duty cycle.

I will redirect your question to the buck switching regulators group though since I feel they may be of more help.

Thank you,
Nick

0 Carlos Silva85 over 6 years ago in reply to Nick Jakse49

TI__Expert 4915 points

Thanks Nick,

I will need 100% duty. Think of this as a high power capacitor pre-charge for a motor drive, which needs to stay fully on once Vin=Vout

0 David Baba over 6 years ago in reply to Carlos Silva85

TI__Mastermind 40040 points

Hello,

Only 100% DC/DC controller available is the LM5085, this is a 75Vin max device.

hope this helps?

David.

0 Carlos Silva85 over 6 years ago in reply to David Baba

TI__Expert 4915 points

It could perhaps help if we had a synchronous rectification variant?

0 David Baba over 6 years ago in reply to Carlos Silva85

TI__Mastermind 40040 points

Hello Carlos,

Unfortunately we do not have one available at this time.

Sorry.

David.

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constant current load SMPS