UCC28911 Conditions for use

masahiko shimizu

Other Parts Discussed in Thread: UCC28911, UCC28703

I want to recommed TI power IC to custommer at the followiung condition.
Can UCC28911 use at those conditon?

1. 24Vin -> 12Vout, 0.7A(Max)
2. 24Vin -> 330Vout, 6mA(Max)
3. 24Vin -> 150Vout, 1.5mA(Max)

Best regards
Shimizu

over 10 years ago

0 John Griffin1 over 10 years ago

TI__Mastermind 34465 points

Hi
The UCC28911 requires a minimum input voltage of 35V to operate. The reason for this is that the internal high voltage switch has a minimum turn on voltage in order to charge the internal VDD supply.
Regards,
John Griffin

0 masahiko shimizu over 10 years ago in reply to John Griffin1

Guru 11235 points

Hi John

Thank you for your support.
I understood.

Please tell me only another.
This question is last.
Is it possible by UCC28703?

Thanks
Shimizu

0 John Griffin1 over 10 years ago in reply to masahiko shimizu

TI__Mastermind 34465 points

Hi Shimizu,
The UCC28703 has a max VDD turn on threshold of 23V and a VDD turn off threshold of 8.45V max.
Therefore it will work with 24V supply.
Regards,
John

0 masahiko shimizu over 10 years ago in reply to John Griffin1

Guru 11235 points

Hi John

Thank you for your support

I understood.

Thanks

Shimizu

Power management

Power management forum

UCC28911 Conditions for use