RT9373A应用电路 (3通道电荷泵白光LED低压降电流源驱动器)

The RT9373A is a high efficiency and cost effective charge pump white LED driver. It supports up to 3 white LEDs with regulated constant current for uniform intensity. The RT9373A maintains the highest efficiency by utilizing a x1/x1.5/x2 charge pump and low dropout current regulators.
User can easily configure each LED current from 1.25mA to 20mA by a pulse dimming control. The dimming of white LEDs current can be achieved by applying a pulse signal to the EN pin. There are totally 16 steps of current could be set by users.
RT9373A is available in a WQFN3x3-16L package.

Figure 1. For 3-WLEDs Application Circuit

Figure 2. For 2-WLEDs Application Circuit

RT9373 PDF datasheet    RT9373A pdf datasheet