CP2143 v1.1 product brief led driver series 3-channel low-dropout constant-current parallel led driver with current s e tting resistor general description sot23 - 6l -40 ~8 5 the cp 214 3 , a 3-chan n e l low-dropo ut con s tant-current pa rall el led driver, can be use d to d r ive white le d, b l ue led or a n y colo r le d who s e forwa r d ope rating voltage is lo we r tha n the b a ttery voltage. the uniqu e smart-mi rro r tm technology is introd uce d in CP2143, which can gua rantee a co nsta nt l e d current in variou s o perating conditio n s. without capa cito r or indu ctor, o n ly one resi st or is nee ded f o r setting the curre n t of the leds. the cp2 143 i s availabl e in a spa c e - saving pb-fre e sot23 - 6l p a ckag e. features y 38 a su pply current, ca n be po wered b y a gpio port low as 2.5v y led?s cu rre nt set by extern al resi sto r , up to 40ma per cha nnel sup p o rted y only 150mv drop out voltage nee ded at 20ma per ch annel y led cu rrent matchin g : 0.3% (typical) y pwm dimmin g control or dc voltage con t rol sup p o r ted y over 90 efficien cy can b e rea c he d y no emi and switch n o ise y therm a l sh utdown prote c ti on y shutdown cu rrent less than 0.1 a applications y mobile ph one s y digital still camera y mp3 players y pdas y gps receivers y torche s pin configurations cplsg cplsg-CP2143st sot23-6l package (top view) sot23-6l mark ing en gnd set 6 4 1 2 3 5 le d2 le d1 le d3 copyri ght ?2 006 chipho m e r te chn o log y limited 1
CP2143 v1.1 product brief led driver series 3-channel low-dropout constant-current parallel led driver with current s e tting resistor ty pical application c i rcuits se t cp21 43 le d1 le d2 led3 gnd en r is et gpi o bat t er y se t CP2143 led1 led 2 led 3 gnd en r i set da c bat t ery pw m dimmin g co n t ro l se t CP2143 led1 led2 led 3 gnd en r is e t gp io ba t t e r y ex i s ti n g ldo gpi o on of f se t cp214 3 le d1 le d2 le d3 gnd en r is et gpi o exis ting re g u l a to r pw m dimmin g c o n t ro l v ctrl on of f pw m d i m m in g c o nt rol cp214 3 typi cal appli c atio n circuits con t ac t w i th chiphomer 4f, building d, 1618 yish an ro ad sha nghai, 20 110 3, p.r.c. tel: (86 ) 21 -6 4014 543 6 4 0 5848 8 fax: (86)21-6 4050 030 sale: sales@chiphomer.com tech nical su pport: suppo rt@chi pho mer.com web site: www.chi phom er. c om shenzhen off i ce: 10d, buildin g 2, dushi yan ggua ng ga rd en ch ego n g m iao, futian distri ct, shen zhe n , 5180 48 , p.r.c. tel: (86 ) 75 5-8 204 6706 8 204 77 89 fax: (86 ) 75 5-8 204 670 copyri ght ?2 006 chipho m e r te chn o log y limited 2
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