unisonic technologies co., ltd um608 preliminary linear integrated circuit www.unisonic.com.tw 1 of 4 copyright ? 2012 unisonic technologies co., ltd qw-r105-043.a constant voltage and constant current controller for battery chargers ? description the utc um608 is a highly integrated solution for a constant voltage/constant current mode smps application. the utc um608 contains one 2.5v voltage reference, one operational amplifier for voltage control loop, one operational amplifier for current control loop and two operational amplifiers for charge status. it is suitable for battery charger and other battery systems. ? features * constant voltage and constant current control * precision internal voltage reference * few external components * easy compensation * charge status output for led * build-in overvoltage protection for battery ? ordering information ordering number package packing lead free halogen free um608l-s08-r UM608G-S08-R sop-8 tape reel um608l-s08-t um608g-s08-t sop-8 tube note: xx: output voltage, refer to marki ng information. (1) r: tape reel, t: tube (2) s08: sop-8 (3) g: halogen free, l: lead free um608l-s08-r (1)packing type (2)package type (3)lead free
um608 preliminary linear integrated circuit unisonic technologies co., ltd 2 of 4 www.unisonic.com.tw qw-r105-043.a ? pin configuration ? pin description pin no. pin name description 1 v cc power supply 2 input input of char ge status amplifier 3 out2 charge status output 4 out1 charge status output 5 gnd ground 6 out output pin. sinking current only 7 v ctrl input pin of the voltage control loop 8 v sense input pin of the current control loop ? block diagram
um608 preliminary linear integrated circuit unisonic technologies co., ltd 3 of 4 www.unisonic.com.tw qw-r105-043.a ? absolute maximum rating parameter symbol ratings unit power supply voltage v cc 35 v junction temperature t j 150 c operating temperature t opr -40~+105 c storage temperature t stg -65 ~ +150 c note: 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. ? thermal data parameter symbol ratings unit junction to ambient ja 150 c/w ? recommended operating conditions parameter symbol ratings unit voltage operating v cc 5 ~ 32 v ? electrical characteristics (v cc =15v, t a =25c, unless otherwise specified) parameter symbol test conditions min typ max unit device supply supply current i cc v cc =15v 2 4 ma voltage control loop transconduction gain (v ctrl ) g mv i/(v1-v2) 1 3.5 ma/mv voltage control loop reference v ref 1.25 v input bias current i ibv 50 na current control loop transconduction gain (v sense ) g mi i/(v1-v2) 1.5 7 ma/mv current control loop reference v sense 190 mv output of voltage and current control loop low output voltage at 10ma sinking current v ol 200 mv max output current i om output to v cc sink current only 27 50 ma output of charge sutus high output voltage at 10ma source current v oh 13 13.5 14 v max output current i om output to gnd source current only 20 40 ma sense charge status v ref input of charge status amplifier 65 mv
um608 preliminary linear integrated circuit unisonic technologies co., ltd 4 of 4 www.unisonic.com.tw qw-r105-043.a ? typical application circuit utc um608 v cc input out2 out1 gnd out v sense v ctrl x v cc out gnd comp utc uc3842 fb v ref isense r t /c t bt+ bt- dgnd + - bt1 48v rsense 0.1 d7 led r9 30k fuse2 c15 470 r26 6.8k d5 er804 c14 510p r25 47 ec35 c7 10n c2 fr206 r13 39k c8 68 r12 150k d3 her107 r14 10 nt 5d 1n54 fus 5 3 ac ac x2 c2 47n n2ap817 d c5 4.7n r1 10k r5 3.6k c4 100n r7 9.1k c6 4.7n c9 0.47n r19 910 r18 910 rs 500m r17 22 r3 10k utc 8n60 m2 d9 d r15 10 c16 100 bt- bt+ r10 500 r29 45.45k org=21k r32 1k r34 15k q3 r36 100k c13 10 r23 5.1k r6 3.6k led d4 led d8 dgnd r a 120k qc r b 1k comp1 2.2n rcomp1 470k rcomp2 22k comp2 2.2n comp1_1 22p r28 2k n5ap817_1 d 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 written 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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