LM3481: LM3481 VCC power dissipation

Yangbo

Intellectual 1690 points

Part Number: LM3481
Other Parts Discussed in Thread: TPS40210, LM5022

Hi Team,

My customer is using LM3481 in their design. Blow are two questions:

1. The power loss of VCC will increase when Vin goes up. Can we address this issue?

2. LM3841 can't adjust the soft-start time. Do we have other parts which are similar LM3481 but has SS pin?

Regards,

Yangbo

over 7 years ago

0 Youhao Xi over 7 years ago

TI__Guru* 78340 points

Hi Yangbo,

In order to answer your question, please let us know what topology does your customer use with the LM3481. Regarding the soft-start adjustment, we have other devices like the LM5022,TPS40210, etc. You may contact us through email if you don't want to disclose much of your customer's info.

Thanks,
Youhao

0 Yangbo over 7 years ago in reply to Youhao Xi

TI__Intellectual 1690 points

Hi Youhao,

The topology is flyback. I will email you schematic. Thank you very much!

Regards,
Yangbo

0 Youhao Xi over 7 years ago in reply to Yangbo

TI__Guru* 78340 points

Hi Yangbo,

Since we are communicating through internal emails, lets close the thread here.

Thanks,

Youhao

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LM3481: LM3481 VCC power dissipation