CP2140 v1.0 product brief led driver series 4-channel low-dropout constant-current parallel led driver with pwm dimming control copyright ?2007 chiphomer technology limited 1 general description the CP2140, a 4-channel low-dropout constant-current parallel led driver, can be used to drive white le d, 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 CP2140, which can guarantee a constant led current in various operating conditions. with the pwm signal on the en pin, the brightness of led can be adjusted by the duty cycle. without any external components, it is available in msop-8l package and is ideally suitable for portable device applications. features y no external component required y 20ma full scale current per channel y only 100mv dropout voltage needed at 20ma per channel y led current matching: 2% (typical) y pwm dimming control is supported (0~100khz) y over 90% efficiency can be reached y no emi and switch noise y thermal shutdown protection y supply voltage range: 2.7~5.5v y shutdown current less than 0.1a y rohs compliant and 100% lead(pb)-free applications y mobile phones y digital still camera y mp3 players y pda y gps receivers pin configuration pgnd en vin 8 6 1 2 3 7 led3 led4 led2 lvg msop-8 l package ( top view) msop-8 l marking lvg - CP2140mm agnd 5 4 led1 x y xy- manufacture date code msop-8l -40 ~ 85
CP2140 v1.0 product brief led driver series 4-channel low-dropout constant-current parallel led driver with pwm dimming control copyright ?2007 chiphomer technology limited 2 typical application circuits 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.com technical support: support@chiphomer.com web site: www.chiphomer.com shenzhen office: 10d, building 2, dushi yangguang garden chegongmiao, futian district, shenzhen, 518048, p.r.c. tel: (86)755-82046706 82047789 fax: (86)755-8204670
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