CP2142 Datasheet | CHIP

Product Brief CP2142 V1.0 LED Driver Series 4-Channel Low-Dropout Constant-Current Parallel LED Driver with 1-Wire Pulse Counting Dimming Control .. General Description The CP2142, a 4-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 CP2142, which can guarantee a constant LED current in various operating conditions. The CP2142 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. The CP2142 is available in MSOP-8L package and is ideally suitable for portable device applications. MSOP-8L -40℃~85℃ Features y y y y y y y y y y No external ponent required 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 Mobile phones Digital still camera MP3 PDA GPS Receivers Pin Configuration Copyright © 2007 Chiphomer Technology Limited 1 Product Brief CP2142 V1.0 LED Driver Series 4-Channel Low-Dropout Constant-Current Parallel LED Driver with 1-Wire Pulse Counting Dimming Control .. Typical Application Circuit 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. Technical support: support@chiphomer. Web site: .chiphomer. Shenzhen Office: 10D, Building 2, Dushi Yangguang Garden Che Gong Miao, Futian District, Shenzhen, 518048, P.R.C. Tel: (86)755-82046706 82047789 Fax: (86)755-8204670 Copyright © 2007...