38 V boost for LED backlight strings
The TPS61161DRVRG4 is a single-channel step-up DC-DC regulator from Texas Instruments, purpose-built for white LED backlight applications.
Switching frequency and inductor sizing
The 600 kHz switching frequency sits in the sweet spot for ceramic-capacitor-based designs: high enough to keep the inductor in the 4.7 µH to 10 µH range for a compact footprint, but low enough that switching losses don't dominate the thermal budget at the 700 mA switch current limit.
PWM dimming and temperature range
PWM dimming input allows the backlight brightness to be controlled directly from a PWM source without an external DAC.
