unisonic technologies co., ltd ul23eb preliminary cmos ic www.unisonic.com.tw 1 of 8 copyright ? 2018 unisonic technologies co., ltd qw-r125-071.c high accuracy linear constant current led driver ? description the ul23eb is a linear constant cu rrent ic that supports the adjust brightness or color temperat ure in 3 grades. the application scheme is simple and the cost is low. in the dimming application of ul23eb , user can change the size of the output current by turn on/ off the power switch, that adjust brightness of led lights. changing the rext external resistance adjustment of brightness ratio. in the adjust color temperature application of ul23eb , user can change the state of t he two output ports by turn on/off the power switch, that adjust the color tem perature through the light of two different colored led lights. changi ng the rext external resistance can adjustment t he output power. ? features * no stroboscopic * input voltage 220vac,110vac * adjustable output current, max 60ma * inter-chip current deviation < 4% * application system no emi problems * over temperature reduced current * supports the adjust brightness in 3 grades * supports the adjust color temperature in 3 grades * effectively switching time from 0.3s ~ 3s hsop-8 ? ordering information ordering number lead free halogen free package packing UL23EBL-SH2-R ul23ebg-sh2-r hsop-8 tape reel
ul23eb preliminary cmos ic unisonic technologies co., ltd 2 of 8 www.unisonic.com.tw qw-r125-071.c ? marking ? pin configuration 1 v dd 2 v cc 3 rext1 8 v in 7 nc 6 out1 5 out2 rext2 4 gnd 9 ? pin description pin no. pin name description 1 v dd analog circuit power port 2 v cc digital circuit power port 3 rext1 output current setting pin 1. 4 rext2 output current setting pin 2. 5 out2 constant flow output port 2 6 out1 constant flow output port 1 7 nc no connect 8 v in power input port 9 gnd ground
ul23eb preliminary cmos ic unisonic technologies co., ltd 3 of 8 www.unisonic.com.tw qw-r125-071.c ? absolute maximum rating parameter symbol ratings unit out pin voltage v out1 /v out2 -0.5 ~ 500 v out pin current i out 5 ~ 60 ma v in pin voltage v in -0.5 ~ 500 v rext pin voltage v rext1 /v rext2 -0.5 ~ 8 v v dd pin voltage v vdd -0.5 ~ 8 v v cc pin voltage v vcc -0.5 ~ 8 v working temperature t opr -40 ~ +150 c storage temperature t stq -50 ~ +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. ? electrical characteristics parameter symbol test conditions min typ max unit power of ic pin voltage v dd /v cc 6.8 v out pin voltage v out1 /v out2 i out =30ma 2.5 v out pin withstanding voltage v ds-bv i out =0 500 v output current i out1 /i out2 5 60 ma quiescent current i q v out =10v rext no collection 0.16 0.25 ma rext pin voltage v rext1 /v rext2 v in =20v,v out1 =v out2 =10v 0.6/0.3 v output current accuracy d iout i out =5~60ma 4 % temperature compensate point t sc 130 c
ul23eb preliminary cmos ic unisonic technologies co., ltd 4 of 8 www.unisonic.com.tw qw-r125-071.c ? typical application circuit the ul23eb is a linear constant current ic that supports the adjust brightness or color temperature in 3 grades. the output current can be adjusted from 5ma to 60m a, and constant current accuracy up to 4%. in the adjust brightness mode application of ul23eb ,user can change the size of the output current by turn on/off the power switch, that adjust brightne ss of led lights. changing the rext external resistance adjustment of brightness ratio. open the switch for the 1st time, during constant current rext2 0.6 i1= r open the switch for the 2nd ti me, during constant current rext2 0.3 i2= r open the switch for the 3rd time, during constant current rext1 rext2 0.6 i3= r+r the dimming ratio is 100% 50% x%, rext2 rext1 rext2 r x%= r+r typical applications r rext1 =180 ? r rext2 =20 ? 0.3s < switching period < 3s open the switch for the 1st time, i out =30ma open the switch for the 2nd time, i out =15ma open the switch for the 3rd time, i out =3ma the dimming ratio is 100%, 50%, 10% when the switching period > 3s, system reset.
ul23eb preliminary cmos ic unisonic technologies co., ltd 5 of 8 www.unisonic.com.tw qw-r125-071.c ? typical application circuit (cont.) the ul23eb is a linear constant current ic that supports the adjust brightness or color temperature in 3 grades. the output current can be adjusted from 5ma to 60ma, and constant current accuracy up to 4%. in the adjust brightness mode application of ul23eb ,user can change the size of the output current by turn on/off the power switch, that adjust brightness of led lights. changing the rext external resistance adjustment of brightness ratio. open the switch for the 1st time, during constant current rext1 rext2 0.6 i1= rr ? open the switch for the 2nd time, during constant current rext2 0.3 i2= r open the switch for the 3rd time, during constant current rext2 0.6 i3= r the dimming ratio is 100% 50% x%, rext2 rext1 rext2 r x%= r+r typical applications r rext1 =180 ? r rext2 =20 ? 0.3s < switching period < 3s open the switch for the 1st time, i out2 =3ma open the switch for the 2nd time, i out1 =15ma open the switch for the 3rd time, i out1 =30ma the dimming ratio is 10%, 50%, 100% when the switching period > 3s, system reset.
ul23eb preliminary cmos ic unisonic technologies co., ltd 6 of 8 www.unisonic.com.tw qw-r125-071.c ? typical application circuit (cont.) in the adjust color temperature application of ul23eb , user can change the state of the two output ports by turn on/off the power switch, that adjust the color temperature through the light of two different colored led lights. changing the rext external resistance can adjustment the output power. open the switch for the 1st time, during constant current rext2 0.6 i1= r open the switch for the 2nd time, during constant current rext1 rext2 0.3 0.3 i2= rr ? open the switch for the 3rd time, during constant current rext1 0.6 i3= r typical applications r rext1 =r rext2 =30 ? , 0.3s < switching period < 3s open the switch for the 1st time, i out2 =30ma open the switch for the 2nd time, i out1 =i out2 =15ma open the switch for the 3rd time, i out1 =30ma when the switching period > 3s, system reset.
ul23eb preliminary cmos ic unisonic technologies co., ltd 7 of 8 www.unisonic.com.tw qw-r125-071.c ? multiple ic parallel schemes ul23eb support multiple ic parallel schemes, if the output power is too large that the ic over temperature, multiple ic parallel schemes can be adopted. typical applications r rext1 =r rext3 =r rext5 =180 ? r rext2 =r rext4 =r rext6 =20 ? , 0.3s < switching period < 3s open the switch for the 1st time, i out =90ma open the switch for the 2nd time, i out =45ma open the switch for the 3rd time, i out =9ma the dimming ratio is 100%, 50%, 10% when the switching period > 3s, system reset.
ul23eb preliminary cmos ic unisonic technologies co., ltd 8 of 8 www.unisonic.com.tw qw-r125-071.c 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. utc reserves the right to make changes to information published in this document, including without limitation specifications and product descriptions, at any time and without notice. this document supersedes and replaces all information supplied prior to the publication hereof.
|
