TPS61196: VIFBV and R10 selection

Amelie Zheng

Genius 10865 points

Part Number: TPS61196

Hi Team,

May I ask how I can choose VIFBV?

The display has four strings of LEDs, and the current is 102mA (DUTY 100%).

When R11 = 49.9K is selected, how to choose R10?

over 4 years ago

0 Sean Zhou over 4 years ago

TI__Mastermind 22745 points

Hi Amelie,

For 102mA per channel, from the figure 5, the recommend minimum headroom voltage is about 300mV. Anf refer to equation 4, R10=VIBF*R11/307.3=300*49.9/307.3kohm.

Regards

Sean

Power management

Power management forum

TPS61196: VIFBV and R10 selection