TPS61169: Use confirmation

GARETH OU

Guru 10545 points

Part Number: TPS61169
Other Parts Discussed in Thread: LM36010

Please help confirm whether TPS61169 is suitable for use under the following conditions,

vin3.3v to LED+ / LED- input voltage 3.3V/120mA (PWM dimm)....

vin3.3v to LED+ / LED- input voltage 12V/80mA(PWM Dimm)

Thank you

over 5 years ago

0 Yuting Shao over 5 years ago

TI__Genius 13001 points

Hi Gareth,

TPS61169 is a booster, so output should be larger than input.

BR,

Robin

0 GARETH OU over 5 years ago in reply to Yuting Shao

Guru 10545 points

Hi Robin

Thank you very much
Do you suggest other suitable solutions please?

0 Yuting Shao over 5 years ago in reply to GARETH OU

TI__Genius 13001 points

Hi Gareth,

What's the required PWM dimming frequency? BTW, the output voltage could be lower than 3.3V?

BR,

Robin

0 GARETH OU over 5 years ago in reply to Yuting Shao

Guru 10545 points

Hi Robin

The dimming Fre. About 200Hz ~ 1KHz

0 Yuting Shao over 5 years ago in reply to GARETH OU

TI__Genius 13001 points

Hi Gareth,

Pls. refer to LM36010 which supports pass mode and boost mode.

For low output, utilize pass mode and strobe can achieve equal PWM dimming but the dimming frequency is limited.

BR,

Robin

0 GARETH OU over 5 years ago in reply to Yuting Shao

Guru 10545 points

Thank you for your help

Another question , can lm36010 also do 3.3v to 12v (boost)?

0 Yuting Shao over 5 years ago in reply to GARETH OU

TI__Genius 13001 points

Hi Gareth,

LM36010 cannot support 12V output.

After test with TPS61169 EVM, it has been verified that TPS61169 could also support 3.3V output with 3.3V input. Pls. refer to the below pictures.

0 GARETH OU over 5 years ago in reply to Yuting Shao

Guru 10545 points

Good news, thank you so much

Power management

Power management forum

TPS61169: Use confirmation