CP2141 Datasheet | CHIP

Product Brief CP2141 V1.1 LED Driver Series 3-Channel Low-Dropout Constant-Current Parallel LED Driver with 1-Wire Pulse Counting Dimming Control .. General Description The CP2141, a 3-channel low-dropout constant-current parallel LED driver, can be used to drive white LED, red LED, blue LED or any color LED whose forward operating voltage is lower than the battery voltage. The unique Auto-Mirror TM technology is introduced in CP2141, which can guarantee a constant LED current in various operating conditions. The CP2141 uses the 1-wire pulse counting technique to adjust the brightness of LEDs, with the pulse signal on the EN pin, the LED current varies according to 16 steps logarithmic scale. Without any external ponents, it is available in a tiny SOT23-6L package and is ideally suitable for portable device applications. SOT23-6L -40℃~85℃ Features y y y y y y y y y y y No External ponent Required 20m A Full Scale Current per Channel Only 100m V Dropout Voltage Needed at 20m A per Channel 1-Wire Pulse Counting Dimming: 16 Steps Logarithmic Scale LED Current Matching: ±2% (typical) Over 90% Efficiency can be Reached No EMI and Switch Noise Thermal Shutdown Protection Supply Voltage Range: 2.7~5.5V Shutdown Current Less Than 0.1μA Ro HS pliant and 100% Lead(Pb)-free Applications y y y y y Mobile Phones Digital Still Camera MP3 Players PDA GPS Receivers Pin Configuration Copyright © 2006 Chiphomer Technology Limited 1 Product Brief CP2141 V1.1 LED Driver Series 3-Channel Low-Dropout Constant-Current Parallel LED Driver with 1-Wire Pulse Counting Dimming Control .. Typical Application Circuit Existing Regulator Battery VDD 1- wire pulse counting dimming EN LED1 LED2 LED3 Battery VDD 1- wire pulse counting dimming EN LED1 LED2 LED3 Contact with Chiphomer 4F, Building D, 1618 Yishan Road Shanghai, 201103, P.R.C. Tel: (86)21-64014543 64058488 Fax: (86)21-64050030 Sale: sales@chiphomer....