Boost regulator for single-string LED backlight
The Texas Instruments TPS61169DCKR is a current-mode step-up (boost) DC-DC regulator designed to drive a single string of white LEDs for display backlight applications. PWM dimming input allows direct brightness control from a microcontroller or PWM source, eliminating the need for an external DAC or analog dimming circuit.
1.2 MHz switching frequency and inductor selection
The 1.2 MHz switching frequency keeps the inductor small and pushes switching noise above the audible band.