TPS61169: Competitor is LP3321(LowPowerSemi)

user4215035

Part Number: TPS61169

Hi,

I used a LED driver LP3321 (Low Power Semi) before, now I want to replace it with TPS61169, but I want to know how to deal with the Pin4 (Ctrl) .Whether the Ctrl Pin can float?

below is TPS61169 and LP3321 schematic.

over 6 years ago

0 Charles-Chen over 6 years ago

TI__Genius 11836 points

Hi,

You need to input a PWM signal for CTRL pin to achieve PWM dimming control. Please refer to the following table and datasheet 8.3.5 for details. Avoid floating the CTRL pin.

0 user4215035 over 6 years ago in reply to Charles-Chen

Intellectual 620 points

Charles,

Thanks so much.

I have an other question: Which part(TI part) i can use to replace LP3321 directly?

Thanks

Lemon Shen

0 Sean Zhou over 6 years ago in reply to user4215035

TI__Mastermind 22745 points

Hi Lemon,

TPS61169 is the most similiar one, but the package is a little smaller than the LP3321. You can help to check whether customer can use our TPS61169 which can also save the space.

Regards

Sean

0 user4215035 over 6 years ago in reply to Sean Zhou

Intellectual 620 points

Sean,

Thanks so much.

I will check it with customer.

Lemon

0 Sean Zhou over 6 years ago in reply to user4215035

TI__Mastermind 22745 points

Hi Lemon,

Ok, waiting for your good news.

Regards

Sean

0 Sean Zhou over 6 years ago in reply to user4215035

TI__Mastermind 22745 points

Hi Sir,

Do you have any more question? I'd like to close this question if you don't have more question. Thanks.

Regards

Sean

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TPS61169: Competitor is LP3321(LowPowerSemi)