RT9373A

RT9373A 3-Channel Charge Pump White LED Driver with Low Dropout Current Source General Description Features 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. z Very High Efficiency Over 80% of Battery Life z Support up to 3 White LEDs z Support Up to 60mA Output Current z 1% Typical LED Current Matching z Soft Start Function z Auto Charge Pump Mode Selection z 250kHz Fixed Frequency Oscillator z Output Over Voltage Protection z 16 Steps Brightness Control z Low Input Noise and EMI z RoHS Compliant and 100% Lead (Pb)-Free RT9373A is available in a WQFN3x3-16L package. Applications Ordering Information RT9373A Package Type QW : WQFN-16L 3x3 (W-Type) Lead Plating System P : Pb Free G : Green (Halogen Free and Pb Free) z Mobile Phone, DSC, MP3 z White LED Backlighting z LCDDisplay Supply Pin Configurations (TOP VIEW) LED3 LED2 LED1 VIN Note : Richtek products are : ` RoHS compliant and compatible with the current requirements of IPC/JEDEC J-STD-020. ` Suitable for use in SnPb or Pb-free solderi...