unisonic technologies co., ltd um607 linear integrated circuit www.unisonic.com.tw 1 of 7 copyright ? 2011 unisonic technologies co., ltd qw-r105-037.b cc, cv control for battery charger and adaptor ? description the utc um607 is a voltage and current control ic which has precision voltage reference. thes e devices have been optimized for battery charger, adapter, second c ontroller of switching regulator systems, and other battery systems. ? features * constant voltage control (cv) and constant current control (cc) * input voltage ranging from 2.2v to 14v * 40ma photo coupler drive current typically * 1ma maximum operating current * internal precision voltage reference : 1.240v 1% * easy compensation and low external component count. sot-26 4 5 3 2 1 6 ? ordering information ordering number lead free halogen free package packing um607xl-ag6-r UM607XG-AG6-R sot-26 tape reel
um607 linear integrated circuit unisonic technologies co., ltd 2 of 7 www.unisonic.com.tw qw-r105-037.b ? marking information package a-ch reference voltage code marking sot-26 150mv 70mv b d um7 g 1 23 4 5 6 reference voltage ? pin configuration ? pin description pin no. pin name description 1 a-input input pin of the current control loop 2 gnd ground line. 0v reference for all voltages 3 b+input input pin of the voltage control loop 4 v cc dc supply line 5 pc photo coupler (p/c) drive pin. sinking current only 6 a+input input pin of the current control loop
um607 linear integrated circuit unisonic technologies co., ltd 3 of 7 www.unisonic.com.tw qw-r105-037.b ? block diagram
um607 linear integrated circuit unisonic technologies co., ltd 4 of 7 www.unisonic.com.tw qw-r105-037.b ? absolute maximum rating (ta=25c, unless otherwise specified) parameter symbol ratings unit dc supply voltage v cc 16 v power dissipation (note 2) p d 500 mw operating temperature t opr -40 ~ +85 c storage temperature t stg -55 ~ +150 c notes: 1. absolute maximum ratings are those values beyond which the device could be permanently damaged. absolute maximum ratings are stress ratings only and functional device oper ation is not implied. 2. mount on a glass epoxy circuit boar d of 30x30mm pad dimension of 50mm 2 ? recommended operating conditions parameter symbol ratings unit dc supply voltage v cc 2.2 ~ 14 v ? electrical characteristics (v cc = 5v, ta=25c, unless otherwise specified) parameter symbol test conditions min typ max unit operating current i cc i pc = off 0.6 1.0 ma leakage current i pc(leak) v + =v pc =14v 10 a saturation voltage v pc(sat) i pc = 20 ma 500 700 mv pc terminal current i pc 20 40 70 ma output voltage high v oh r l = 30k ? v cc -0.1 v a ch : current control loop um607b 144 150 156 reference voltage v ref(a) i pc = 2.5ma um607d 66.5 70 73.5 mv input bias current i b(a) 20 50 a transconduction gain (note 1) g m(a) 1.5 8 ma/mv b ch : voltage control loop reference voltage (note 2) v ref(b) i pc = 1.5ma 1.227 1.240 1.253 v input bias current i b(b) 50 500 na transconduction gain (note 3) g m(b) 1 3 ma/mv notes: 1. when the positive input at i ctrl is lower than -151mv, and the volt age is decreased by 1mv, the sinking current at the output out will be increased by 8ma. 2. the internal voltage reference is set at 1.240v (bandgap reference). the voltage control loop precision takes into account the cumulative e ffects of the internal voltage refe rence deviation as well as the input offset voltage of the trans-conduc tance operational amplifier. 3. if the voltage on b +input (the posit ive input of the amplifier) is hi gher than the negative amplifier input (v ref(b) = 1.240v), and it is increased by 1mv, the sinking current at th e output out will be increased by 3ma.
um607 linear integrated circuit unisonic technologies co., ltd 5 of 7 www.unisonic.com.tw qw-r105-037.b ? typical application circuit in the above application schematic, the utc um607 is used on the secondary side of a flyback adapter (or battery charger) to provide an accurate control of voltage and current. the above feedback loop is made with an optocoupler.
um607 linear integrated circuit unisonic technologies co., ltd 6 of 7 www.unisonic.com.tw qw-r105-037.b ? typical characteristics 0.5 0.55 0.6 0.65 0.7 0.75 0.85 0.8 0.9 -35 -25 -15 -5 5 15 25 35 45 55 65 75 85 supply current, i cc (ma) supply current vs. ambient tempreture v in =12v v in =5v v in =2.2v ambient temperature, ta (c) -35 -15 5 25 45 65 85 input bias current, i b (b) (na) input bias current vs. ambient tempreture ambient temperature, ta (c) 0 20 40 60 80 100 120 -50 105 supply voltage, v cc (v) supply current, i cc (ma) supply current vs. supply voltage photo coupler, v pc (v) pc terminal current, i pc (ma) pc terminal current vs. photo coupler 16 0 0.2 0.4 0.6 0.8 1.0 1.2 2 4 6 8 10 12 14 0 0 15 30 45 60 75 90 2 4 6 8 10 12 14 0 16 -35-15 5 25456585 ambient temperature, t a ( c ) v ref _a (mv) v ref _a (mv) vs. ambient tempreture -35-15 5 25456585 ambient temperature, t a ( c ) 1.225 1.230 1.235 1.240 1.245 1.250 v ref _b (v) v ref _b (v) vs. ambient tempreture 67 68 69 70 71 72 73
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