product brief CP2167 v1.0 led driver series high efficiency 1x/1.5x fractional ch arge pump for white led (1-wire pulse counting dimming control) with dual channel 200ma ldo copyright ?2008 chiphomer technology limited 1 overview 3mm*3mm qfn 20l -40 85 0 the CP2167 is an integrated solution for 4 white led supplies in backlighting color display applications and phone camera input supply. the device contains a self adapted charge pump white led driver and dual channel low dropout linear regulators. the CP2167 is available in a small 20-pin 3mm*3mm qfn package. in the section of charge pump, high efficiency is achi eved by utilizing a 1x/1.5x adaptive fractional conversion technique in combination with low dropout current re gulator. the CP2167 provides up to 4 led at 30ma each and uses 1-wire pulse counting technique to adjust the brightness of leds, with the pulse signal on the en1 pin, and the led current varies according to 16 steps logarithm scale. in the section of ldo, the CP2167 contains a dual channel, low noise, and low dropout regulator sourcing up to 200ma at each channel, and while the typical dropout-v oltage is 200mv. the excellent transient response performance, high psrr and no bypass capacitor makes t he ldos suitable for digital applications. the output voltage ranges from 1.0v ~3.3v. anti reverse current function can prevent reverse current in the situation that the output voltage is above the input voltage. the ldo also provides current limiting and short-protection. features z supply voltage ranging from 2.7 v to 5.5 v z over-current, over-temperature and short protection z anti reverse current z 3mm*3mm qfn 20l z less than 0.1 a quiescent current in shutdown mode z rohs6 compliant charge pump section z drives up to 4 leds at 30 ma each z regulated output current with 0.5% matching z utilizing a 1x/1.5x adaptive fractional conversion technique for high efficiency (up to 92%) z wire pulse counting dimming : 16 steps logarithm scale z low input ripple and low emi z 1 mhz operating frequency z 1-wire pulse counting technique ldo section z low dropout voltage at 200ma load current: 200mv z high output voltage accuracy: 1.5%
product brief CP2167 v1.0 led driver series high efficiency 1x/1.5x fractional ch arge pump for white led (1-wire pulse counting dimming control) with dual channel 200ma ldo copyright ?2008 chiphomer technology limited 2 z high power supply rejection ratio: 68db@1khz z low output noise: 150vrms z low quiescent current: 72a (one channel 46a) z stable with 0.47f ceramic capacitor z fast turn on:50s z output voltage range 1.0v~3.3v z using two en pin to control each ldo pin diagram (top view) vin2 c2+ c1+ c1- c2- vout1 en4 1 2 3 4 5 15 14 13 12 11 vin vout2 applications y cellular/gsm/phs phones y digital cameras y pdas, mp3 players y portable, battery powered equi pments, portable computers
product brief CP2167 v1.0 led driver series high efficiency 1x/1.5x fractional ch arge pump for white led (1-wire pulse counting dimming control) with dual channel 200ma ldo copyright ?2008 chiphomer technology limited 3 typical application chiphomer technology limited add: 4f, building d, 1618 yishan road, shanghai, p.r.c. tel: +86-(0)21-64058488, 64014543 fax: +86-(0)21-64050030 email: sales@chiphomer.com web: www.chiphomer.com shenzhen office: 10d, building 2, dushi yangguang garden chegongmi ao, futian district, shenzhen, 518048, p.r.c. tel: (86)755-82046706, 82047789 fax: (86)755-82046709
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