CP2143 Datasheet | CHIP

Product Brief CP2143 V1.1 LED Driver Series 3-Channel Low-Dropout Constant-Current Parallel LED Driver with Current Setting Resistor .. General Description The CP2143, a 3-channel low-dropout constant-current parallel LED driver, can be used to drive white LED, blue LED or any color LED whose forward operating voltage is lower than the battery voltage. The unique Smart-Mirror TM technology is introduced in CP2143, which can guarantee a constant LED current in various operating conditions. Without capacitor or inductor, only one resistor is needed for setting the current of the LEDs. The CP2143 is available in a space-saving Pb-free SOT23-6L package. SOT23-6L -40℃~85℃ Features y y y y y y y y y 38μA supply current, can be powered by a GPIO port low as 2.5V LED’s current set by external resistor, up to 40m A per channel supported Only 150m V dropout voltage needed at 20m A per channel LED current matching: ±0.3% (typical) PWM dimming control or DC voltage control supported Over 90％ efficiency can be reached No EMI and switch noise Thermal shutdown protection Shutdown current less than 0.1μA Applications y y y y y y Mobile phones Digital still camera MP3 players PDAs GPS receivers Torches Pin Configurations SOT23-6L Package (Top View) EN GND SET SOT23-6L Marking LED1 LED2 LED3 CPLSG CPLSG-CP2143ST Copyright ©2006 Chiphomer Technology Limited 1 Product Brief CP2143 V1.1 LED Driver Series 3-Channel Low-Dropout Constant-Current Parallel LED Driver with Current Setting Resistor .. Typical Application circuits RISET Battery LED1 LED2 LED3 RISET Battery LED1 LED2...