UCC28051: About UVLO and support of AC and DC input

Tao_2199

Genius 5770 points

Part Number: UCC28051

Hello,

Regarding to UCC28051D, my customer is asking some question.

(1)According to datasheet, ULVO is 12.5V(typ). But some characteristics data is at Vcc=12V.

(Below (Figure 15/16))

In this case, how should we interpret about it? Could you please explain about it?

(2) They will design two conditions as following.

･AC/DC input:AC100－AC264V output:DC390V

･DC/DC input:DC100V output:DC390V

Can UCC28051D support AC and DC input?

Regards,

Tao 2199

over 6 years ago

0 Benjamin Lough over 6 years ago

TI__Mastermind 27095 points

Hi Tao,

The VCC UVLO turn on threshold is 12.5V typical but the turn off threshold is 9.7V typical. This means VCC must initially be greater than 12.5V but can later be lowered to 12.0V without turning off the controler.

I will need to check if this controller can work with DC input and get back to you.

Best Regards,
Ben Lough

0 Benjamin Lough over 6 years ago in reply to Benjamin Lough

TI__Mastermind 27095 points

Hi Tao,

This device will be able to support DC input. It will function as a conventional TM boost converter.

Best Regards,
Ben Lough

0 Tao_2199 over 6 years ago in reply to Benjamin Lough

Genius 5770 points

Hello Ben,

I informed to my customer your answer.

I will close this thread.

Many thanks!

Regards,

Tao 2199

Power management

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UCC28051: About UVLO and support of AC and DC input