TPS61160A: Output current

Atsushi Takahashi

Part Number: TPS61160A

Tool/software:

Hi Team,

Would it be okay to set Rset to 2.5Ω and use the CTRL-pin to adjust the LED current from 0 to 80mA?

All of efficiency vs output current graphs(Figure 1 to 4) in the data sheet are up to 50mA, so the customer is concerned about whether there will be any problems using it at 80mA.

Best Regards,

over 1 year ago

0 Patrick Yao over 1 year ago

TI__Mastermind 34710 points

Hi Atsushi,

What is the output voltage?

Patrick

0 Atsushi Takahashi over 1 year ago in reply to Patrick Yao

Expert 1405 points

Hi Patrick-san,

I’m sorry for the late reply.

I'd like to inform you of the customer's usage conditions.

<Usage conditions>
Input voltage: 3.3V
Output voltage: Min 13.5V to Max 15V
Number of LEDs: 5 in series x 4 in parallel, total 20

I told you that the output current is 80mA, but it seems to be 60mA in reality.

1) Can this device be used at 60mA?

2) What is the Max value of the output current that can be passed under the customer's usage conditions above?

0 Patrick Yao over 1 year ago in reply to Atsushi Takahashi

TI__Mastermind 34710 points

Hi Atsushi-san,

TPS61160A has a minimum 0.56A switch current limit. This is used to estimate the maximum output current.

Below is an example of the calculation.

Patrick

Power management

Power management forum

TPS61160A: Output current