TL1451A: Single channel

Takashi Yamaguchi

Genius 12030 points

Part Number: TL1451A

Hi team,

The TL1451A is dual channels controller. When using single channel, is it ok to connect the input(IN+/-)-pin to GND, FB-pin to GND, and OUT-pin open, for the unused channel? Can you tell me if there are any other precautions I need to take?

Could you also tell me the DTC-pin handling for the unused channel?

Regards,

Yamaguchi

over 3 years ago

+1 Youhao Xi over 3 years ago

TI__Guru 74410 points

Hi Yamaguchi-san,

Thank you for posting. I would like to put the IN+ to GND and IN- to REF, and leave the OUT pin open. Regarding DTC, you can leave it open because the channel is already stops switching by the IN- pin setting.

Thanks,

Youhao Xi, Applications Engineering

0 Takashi Yamaguchi over 3 years ago in reply to Youhao Xi

TI__Genius 12030 points

Hi Youhao-san,

Thank you for the answer. How about the FB-pin handling for the unused channel?

Regards,

Yamaguchi

+1 Youhao Xi over 3 years ago in reply to Takashi Yamaguchi

TI__Guru 74410 points

Hi Yamaguchi-san,

An important correction: Sorry I made a big mistake in my previous reply. For the unused channel, IN+ pin should be put to REF and IN- to GND, and leave OUT pin open. Sorry for the typos and the confusions this may cause you.

Regarding FB pin, I would leave the unused channel FB pin open, too. Note that the FB pin is energized by the error amplifier.

Again, apologize for the typos.

Thanks,

Youhao

0 Takashi Yamaguchi over 3 years ago in reply to Youhao Xi

TI__Genius 12030 points

Hi Yuhao-san,

Thank you so much for the correction. I will inform it to the customer.

Regards,

Yamaguchi

0 Youhao Xi over 3 years ago in reply to Takashi Yamaguchi

TI__Guru 74410 points

Thank you Yamaguchi-san! Please allow me to close this thread now and you can add a new post to re-open it or create a new thread.

Again, thank you!

Best Regards,

Youhao

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TL1451A: Single channel