LM5122 110V operation on PMP7973

KIYOSHI NARISAWA1

Expert 1510 points

Other Parts Discussed in Thread: LM5122

Dear TI

Customer would like to use LM5122 at below condition.

Vin=19V, Vout=110V,Io=0.5A

I found PMP7973 document which was operated at 110V output.

Can LM5122 operate at 19V Vin as same as PMP7973?

If it's possible, I'd like to propose to customer with schematic.

Thank you for your cooperations

K.Narisawa

0 EricLee over 9 years ago

LM5122 can operate at 19V Vin. You just have to operate in non-synchronous.

Since the step up ratio is high, you may have to set up the switching frequency around 150~170kHz.

Regards

0 KIYOSHI NARISAWA1 over 9 years ago in reply to EricLee

Expert 1510 points

Hi Eric-san,

Thank you for your support.

We had meeting with customer last week and were interested.

We need more detail schematic to go to next phase but however Webench didn't support this copndition due to spec out for 100V out.

I'd like to go next phase with customer with detail schematic.

Conditions are

LM5122

Vin:18V(min) / 19V(typ) / 20V(max), Vout=100V -/+10V, Io=0.5A

like PMP7973 material

My e-mail address is

Thank you for your cooperation

K.Narisawa

0 EricLee over 9 years ago in reply to KIYOSHI NARISAWA1

Will contact you by e-mail.

Regards

0 KIYOSHI NARISAWA1 over 9 years ago in reply to EricLee

Expert 1510 points

Hi Eric-san

Thank you for your help.

Best regards

K.Narisawa

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