unisonic technologies co., ltd UM606 linear integrated circuit www.unisonic.com.tw 1 of 7 copyright ? 2009 unisonic technologies co., ltd qw-r105-034.b constant voltage and constant current controller ? description the utc UM606, for a constant voltage/ constant current mode smps (switch mode power supplies) application which is a highly integrated solution, it contains one 1.21v voltage reference with 1% accuracy, one current sensing circuit and two operational amplifiers. the utc UM606 is an ideal voltage controller for use in adapters and battery chargers because the voltage reference it?s combining with one operational amplifier. and the utc UM606 is an ideal current limiter for output low side current sensing because the other low voltage reference is combin ing with the other operational amplifier. ? features *constant voltage and c onstant current control *precision internal voltage reference *few external components *easy compensation sot-26 4 5 3 2 1 6 ? ordering information ordering number lead free halogen free package packing UM606l-ag6-r UM606g-ag6-r sot-26 tape reel ? marking ume6 123 4 5 6 l: lead free l : halogen free
UM606 linear integrated circuit unisonic technologies co., ltd 2 of 7 www.unisonic.com.tw qw-r105-034.b ? pin configuration ? pin description pin no. pin name function 1 v ctrl input pin of the voltage control loop 2 gnd ground 3 v out output pin. sinking current only 4 i ctrl input pin of the current control loop 5 v sense input pin of the current control loop 6 v cc power supply
UM606 linear integrated circuit unisonic technologies co., ltd 3 of 7 www.unisonic.com.tw qw-r105-034.b ? block diagram
UM606 linear integrated circuit unisonic technologies co., ltd 4 of 7 www.unisonic.com.tw qw-r105-034.b ? absolute maximum ratings parameter symbol ratings unit dc supply voltage v cc 20 v input voltage v in -0.3 ~ v cc v junction temperature t j +150 c storage temperature t stg -65 ~ +150 c note: absolute maximum ratings are those values beyond which the device coul d be permanently damaged. absolute maximum ratings are stress ratings only and functional device oper ation is not implied. ? thermal data parameter symbol min typ max unit junction to case jc 92 c/w ? recommended operating conditions parameter symbol min typ max unit supply voltage v cc 2.5 18 v operating temperature t a -20 +70 c ? electrical characteristics (v cc =5v, t a =25c, unless otherwise specified.) parameter symbol test conditions min typ max unit reference voltage v ref 1.198 1.21 1.222 v current control loop reference v sense i out =2.5ma 196 200 204 mv low output voltage v ol @ 10ma sinking current 200 mv total supply current i cc v cc =5v 0.6 1.2 ma input bias current i ib 50 na current out of pin i ctrl i ibi @ -200mv 25 a output short circuit current. i os output to v cc . sink current only 27 50 ma transconduction gain (v ctrl ) gmv sink current only 1 3.5 ma/mv transconduction gain (i ctrl ). gmi 1.5 7 ma/mv
UM606 linear integrated circuit unisonic technologies co., ltd 5 of 7 www.unisonic.com.tw qw-r105-034.b ? typical application gnd v cc v out v ctrl i ctrl v sense UM606 gnd load v out to primary r 1 r 2 r 3 470k r 4 c 1 2.2nf c 2 22pf c 3 2.2nf r 5 22k r 6 500 r 7 6 3 1 2 5 4
UM606 linear integrated circuit unisonic technologies co., ltd 6 of 7 www.unisonic.com.tw qw-r105-034.b ? typical performance characteristics
UM606 linear integrated circuit unisonic technologies co., ltd 7 of 7 www.unisonic.com.tw qw-r105-034.b utc assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all utc products described or contained herein. utc products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. reproduction in whole or in part is prohibited without the prior writ ten consent of the copyright owner. the information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice.
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