unisonic technologies co., ltd um601/a preliminary linear integrated circuit www.unisonic.com.tw 1 of 5 copyright ? 2010 unisonic technologies co., ltd qw-r105-028.b voltage and current controller ? description the utc um601/a integrated circuit incorporates a high stability series band gap voltage reference, tw o ored operational amplifiers and a current source. this ic compares the dc volt age and the current level at the output of a switching power supply to an internal reference. it provides a feedback through an optocoupler to the pwm controller ic in the primary side. the controlled current generator can be used to modify the level of current limitation by offsetting t he information coming from the current sensing resistor. it can be used in voltage supervisors, every types of application requiring a precision voltage regula tion and current limitation, over voltage protection, battery charger wi th a constant voltage and a limited output current. ? features * 1.24v series voltage reference with 10ma output current and 1% precision (um601a) * two operational amplifiers with ored output and 1mhz gain bandwidth product * built-in current generator wi th enable / disable function * 4.5 ~ 32v supply voltage range ? ordering information ordering number normal lead free halogen free package packing um601-s08-r um601l-s08-r um 601g-s08-r sop-8 tape reel um601-d08-t um601l-d08-t um601g-d08-t dip-8 tube um601a-s08-r um601al-s08-r um601a g-s08-r sop-8 tape reel UM601A-D08-T um601al-d08-t um601ag-d08-t dip-8 tube
um601/a preliminary linear integrated circuit unisonic technologies co., ltd 2 of 5 www.unisonic.com.tw qw-r105-028.b ? pin configuration v ref + - - + gnd 4 3 c rref 2 c sen 1 v ref 8 v cc 7 v rin 6output 5 c rin ? pin description pin name type function 1. v ref output voltage reference output 1. 24v, 10ma max. do not short circuit 2. c sen input current source enable input. this current source can be used to offset the voltage measurement on the sense resist or and therefore to modify the charge current. the current source is enabled w hen the input volage on pin 2 is lower than 0.8v 3. c rref input current limitation reference input 4. gnd input ground 5. c rin input current limitation loop input, connected to the sense resistor 6. output output output pin common to the voltage regulat ion and current limitation loops. this output can drive the primary side (led) of an optocoupler 7. v rin input voltage regulation loop input 8. v cc input power supply input (4.5 ~ 32vdc)
um601/a preliminary linear integrated circuit unisonic technologies co., ltd 3 of 5 www.unisonic.com.tw qw-r105-028.b ? block diagram
um601/a preliminary linear integrated circuit unisonic technologies co., ltd 4 of 5 www.unisonic.com.tw qw-r105-028.b ? absolute maximum rating parameter symbol ratings unit dc supply voltage v cc 36 v output current i out 20 ma power dissipation p d 200 mw input voltage v in -0.3 ~ v cc -1.5 v input current i in 1 ma junction temperature t j 150 c storage temperature t stg -40 ~ +125 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. ? operating conditions parameter symbol ratings unit supply voltage v cc 4.5 ~ 32 v ambient operating temperature t opr t min ~ t max c ? thermal data parameter symbol ratings unit junction to ambient ja 130 ~ 200 c/w ? electrical characteristics (v cc =15v, t a =25c, unless otherwise specified) parameter symbol test conditions min typ max unit total supply current i cc v cc =15v 2 ma input voltage v i 0 v cc -1.5 v t a =25c -5 1 5 mv input offset voltage v io t min. um601/a preliminary linear integrated circuit unisonic technologies co., ltd 5 of 5 www.unisonic.com.tw qw-r105-028.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 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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