unisonic technologies co., ltd UCL2300 preliminary linear integrated circuit www.unisonic.com.tw 1 of 5 copyright ? 2014 unisonic technologies co., ltd qw-r125-034.a psr single-stage apfc offline led driver ? description the utc UCL2300 is a high precision primary-side regulation controller with single stage active pfc, specially designed for universal input offline flyback or buck-boost constant current led lighting. the controller with on-chip pfc circuit achieves high power factor and low thd. operat ing in critical conduction mode, the power mosfet switching loss is reduced and the inductor is fully utilized. the utc UCL2300 adopts proprietary primary side current sensing scheme. it can precisely control the led current without secondary side sense and feedback circuits. the system size and cost are optimized, as well as the system reliability. the utc UCL2300 utilizes patented line and load voltage compensation method to achieve excellent line and load regulation. and the line compensat ion factor can also be tuned externally for flexibility. the utc UCL2300 offers rich protection functions to improve the system reliability, including led open circuit protection, led short circuit protection, v cc over voltage protection, v cc under voltage protection, cs resistor open protection and cycle by cycle current limit. all the protecti on functions are auto-recovery. ? features * single-stage active pfc for high power factor and low thd * primary side control constant current operation, no opto-coupler required * ultrafast led start (<200ms @85v) * 3% led current accuracy * excellent line and load regulation * critical conduction mode operation * source driving method * ultra-low (20 a) startup current * ultra-low (300 a) operating current * high resistance feedback resistor for improved efficiency * led open and short circuit protection * cs resistor open and short circuit protection * transformer saturation protection * cycle-by-cycle current limit * v cc over-voltage and under-voltage protection * auto fault recovery ? ordering information ordering number package packing UCL2300g-s08-r sop-8 tape reel
UCL2300 preliminary linear integrated circuit unisonic technologies co., ltd 2 of 5 www.unisonic.com.tw qw-r125-034.a ? marking ? pin configuration 1 2 3 4 8 7 6 5 cs gnd comp ln out st v cc fb ? pin description pin no. pin name description 1 cs current sense pin. connect a resistor to gnd to sense the power mosfet current. 2 gnd ground. 3 comp loop compensation node. 4 ln line voltage sample input. 5 fb feedback voltage input pin. 6 v cc power supply pin. 7 st chip enable pin. 8 out pulse out pin. connected to the ?source? of external power mosfet. ? block diagram
UCL2300 preliminary linear integrated circuit unisonic technologies co., ltd 3 of 5 www.unisonic.com.tw qw-r125-034.a ? absolute maximum rating parameter symbol ratings unit v cc pin input voltage v cc -0.3~22 v current sense pin input voltage cs -0.3~6 v compensation pin voltage comp -0.3~6 v line voltage sample input ln -0.3~6 v feedback pin input voltage fb -0.3~6 v st pin maximum supply current i st _ ma x 5 ma external power mosfet dr ive voltage out -0.3~18 v maximum work current of internal power mosfet i out 3 a power dissipation (note 1) p dmax 0.45 w junction to ambient ja 145 c/w junction temperature t j -40~+150 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. the maximum power dissipation decrease if temperature rise, it is decided by t jmax , ja , and environment temperature (t a ). the maximum power dissipation is the lower one between p dmax =(t jmax -t a )/ ja and the number listed in the maximum table. ? recommended operation conditions parameter symbol ratings unit power supply voltage v cc 11.5~17.5 v
UCL2300 preliminary linear integrated circuit unisonic technologies co., ltd 4 of 5 www.unisonic.com.tw qw-r125-034.a ? electrical characteristics (notes 1, 2) (unless otherwise specified, v cc =14v and t a =25c) parameter symbol test conditions min typ max unit startup voltage v st startup voltage v st _ on 1ma, v cc =10v 16 17 18 v v st hysteresis voltage v st _ hys v cc =14v 2 v st startup current i st _ on v cc =10v 20 35 a st operating current i st _ op v cc =14v 35 60 a supply voltage section v cc startup voltage v cc _ on v cc rising 10 11 12 v v cc undervoltage protection threshold v cc _ uvlo v cc falling 5.2 5.8 6.5 v v cc hold voltage v cc _ hold v cc falling 7 7.5 8 v v cc turn off current i cc _ uvlo v cc rising, v cc =10v 40 70 a v cc quiescent current i q no switch, v cc =14v 320 600 a v cc operating current i cc f op =60khz 300 a v cc over voltage protection threshold v cc _ ovp 21 v fb feedback fb falling edge threshold voltage v fb _ fall fb falling 0.4 v fb hysteresis voltage v fb _ hys fb rising 0.6 v fb over voltage protection threshold v fb _ ovp 5.5 v minimum off time t off _ min 4.0 s maximum off time t off _ ma x 90 s current sense section leading edge blanking time for current sense t leb _ cs 350 ns switch off delay time t delay 180 ns loop compensation internal reference voltage v ref 0.294 0.300 0.306 v comp low clamp voltage v comp _ lo 1.5 v comp linear operating voltage range v comp 1.5 3.5 v comp protection threshold v comp _ ovp 4.5 v linear voltage sampling ln linear working range v ln 0 2.5 v driver stage internal tube driven mos resistance r ds _ on v cc =14v 1200 m ? notes: 1. production testing of the chip is performed at 25c. 2. the maximum and minimum parameter s specified are guaranteed by tes t, the typical value are guaranteed by design, characterization and statistical analysis
UCL2300 preliminary linear integrated circuit unisonic technologies co., ltd 5 of 5 www.unisonic.com.tw qw-r125-034.a ? typical application circuit 910k 750k 180k 180k 330k 1 2 3 4 5 6 8 7 ln cs comp gnd fb v cc out st ac n p n s n a utc UCL2300 90~264v 100nf 12k 0.82 1 f bas21 4n60 4.7 f 910k 220nf 750k 1nf 1n4007 es20 16.5v/0.6a 470 f 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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