The SM8150A is a charge pump type white LED driver, with 2-system programmable LDOs (Low Dropout Regulator), and step-down DC/DC converter power management IC. The white LED driver provides constantcurrent drive for 1 to 6 backlight white LED connected in parallel and 1 torch/strobe white LED. The charge pump automatically selects between ×1 mode, ×1.5 boost mode, and ×2 boost mode in response to battery voltage, LED drive current, and VF_LED (LED forward bias voltage drop) conditions in order to extend battery drive life. The SM8150A operating mode settings are accessed using an I²C^*1 interface, allowing LED drive current, LDO voltage, output ON/OFF, and other settings to be controlled from a microcontroller.
*1. I²C-BUS is a registered trademark of Philips Electronics N.V.