Power Supply

Build a TFT display power budget from backlight, LCD, touch, host, and regulator losses. Calculate battery runtime with operating modes and measured energy.

Choose LCD backlight PWM frequency by checking driver architecture, minimum pulse width, dimming range, timer resolution, camera banding, noise, and EMI.

Understand TFT LCD AVDD, VGH, VGL, and VCOM rails, how they differ from logic and backlight power, and how to measure bias faults without guessing voltages.

Plan TFT LCD power sequencing with checks for logic rails, reset, initialization, image data, backlight enable, shutdown, brownouts, and fast restarts.