unisonic technologies co., ltd MC34262 preliminary cmos ic www.unisonic.com.tw 1 of 6 copyright ? 2015 unisonic technologies co., ltd qw-r114-006 .a power factor controllers ? description the utc MC34262 is an active power factor controller that functions as a boost preconverter in electronic ballast and in off-line power converter applications. these integrated circuits feature an internal startup timer for stand-alone applications, one quadr ant multiplier for near unity power factor, zero current detector to ensure critical conduction operation, transconductance error am plifier, quick start circuit for enhanced startup, trimmed intern al bandgap reference, current sensing comparator, and a totem pole output ideally suited for driving a power mosfet. the multi-protection function of utc MC34262 can greatly enhance the system reliability and safety. the utc MC34262 features output over voltage protection, input uvlo with hysteresis, cycle-by-cycle current limiting, multiplier output clamp that limits maximum peak switch current, and a drive output high state clamp for mosfet gate pr otection. these devices are available in dual-in-line and surface mount plastic packages. ? features * output over voltage protection * internal startup timer * one quadrant multiplier * zero current detector * trimmed 2% internal bandgap reference * totem pole output with high state clamp * undervoltage lockout (uvlo) with 5.0v of hysteresis * low startup and o perating current * supersedes functionality of sg3561, tda4817 and utc MC34262 dip-8 sop-8 ? ordering information ordering number lead free halogen free package packing MC34262l-d08-t MC34262g-d08-t dip-8 tube - MC34262g-s08-r sop-8 tape reel MC34262l-d08-t (1)packing type (2)package type (1) t: tube, r: tape reel (2) d08: dip-8, s08: sop-8 (3) l: lead free, g: halogen free and lead free (3)green package
MC34262 preliminary cmos ic unisonic technologies co., ltd 2 of 6 www.unisonic.com.tw qw-r114-006 .a ? marking dip-8 sop-8 ? pin configuration fb comp mult cs v cc gd gnd zcd 1 2 3 4 8 7 6 5 ? pin description pin no. pin name description 1 fb iverting input of the error amplifier. t he information on the out voltage of the boost converter is fed into the pin through a resistor divider. 2 comp out of the error amplifier. this pin is connected to ground via a compensation capacitor to achieve stability of the voltage control loop. 3 mult input to the multiplier. this pin is c onnected to the line voltage after the birdge rectified diodes via a resistor divider to provide sinusoidal reference voltage to the current loop. 4 cs input to the cs comparator. the mosfet current is sensed by a resistor, the resulting voltage is applied to this pin and compared with an internal sinusoidal-shaped reference generated by the multiplier to determine the mosfet's turn off. 5 zcd zero current detector input. this pin is connected to the auxiliary winding via a resistor to sense the inductor current zero crossing point by monitoring the auxiliary winding voltage falls blow 1.4v. when activated, a new switching cycle starts. 6 gnd ground pin. 7 gd gate driver out. the totem pole output stage is able to driver power mosfet, the high-level voltage of the pin is clamped at about 16v. 8 vcc supply voltage of driver and control circuits.
MC34262 preliminary cmos ic unisonic technologies co., ltd 3 of 6 www.unisonic.com.tw qw-r114-006 .a ? block diagram + - + + delay timer r 2.5v reference + - + + + + - + - multiplier + - quickstart current sense comparator 1.5v zero current detector 1.2v 36v 6.7v 1.6v/ 1.4v uvlo 13v/ 8.0v 16v 10 drive output 10 rs latch 20k 10pf overvoltage comparator 1.08v ref error amp 10 a v ref v cc zcd gd cs fb comp gnd mult
MC34262 preliminary cmos ic unisonic technologies co., ltd 4 of 6 www.unisonic.com.tw qw-r114-006 .a ? absolute maximum rating parameter symbol ratings unit total power supply and zener current (i cc +i z ) 30 ma output current, source or sink l o 500 ma current sense, multiplier, and voltage feedback inputs v in -1.0~+10 v high state forward current 50 zero current detect input low state reverse current i in -10 ma maximum power dissipation (t a =70c) p d 800 mw n suffix, plastic package thermal resistance, junction-to-air r ja 100 c/w maximum power dissipation (t a =70c) p d 450 mw power dissipation and thermal characteristics d suffix, plastic package thermal resistance, junction-to-air r ja 178 c/w operating junction temperature t j +150 c operating ambient temperature t a 0~+85 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. ? electrical characteristics (\/ cc =12v, for min/max values t a is the operating ambient temperature ra nge that applies unless otherwise noted.) parameter symbol test conditions min typ max unit error amplifier t a =25c 2.465 2.535 v voltage feedback input threshold v fb t a =t low ~t high , v cc =12v~28v 2.44 2.54 line regulation reg line v cc =12v~28v, t a =25c 10 mv input bias current i ib v fb =0v -0.5 a transconductance g m t a =25c 80 130 mho source v fb =2.3v 10 a output current sink l o v fb =2.7v 10 a high state v oh (ea) v fb =2.3v 5.8 v output voltage swing low state v ol (ea) v fb =2.7v 2.4 v overvoltage comparator voltage feedback input threshold v fb (ov) 1.065 v fb 1.095 v fb v multiplier input bias current, mult i mult v fb =0v -0.5 a input threshold, comp v th (m) 1.05 v ol(ea) v multiplier input v mult 0~2.5 v dynamic input voltage range compensation v comp v th(m) ~ (v th(m) +1.0) v multiplier gain k v mult =0.5v, v comp =v th(m) +1.0v 0.43 0.87 1/v zero current detector input threshold voltage v th v in increasing 1.33 1.87 v hysteresis v hys v in decreasing 100 300 mv high state v zcdh i det =+3.0ma 6.1 v input clamp voltage low state v zcdl i det =-3.0ma 0.3 1.0
MC34262 preliminary cmos ic unisonic technologies co., ltd 5 of 6 www.unisonic.com.tw qw-r114-006 .a ? electrical characteristics (cont.) parameter symbol test conditions min typ max unit current sense comparator input bias current i ib v cs =0v -1.0 a input offset voltage v csoffset v comp =1.1v, v mult =0v 25 mv maximum current sense input threshold (note 1) v th (max) 1.3 1.8 v delay to output t phl (in/out) 400 ns drive output i sink =20ma 0.8 v low state v ol i sink =200ma 3.3 i source =20ma 9.8 output voltage high state v oh v cc =12v i source =200ma 7.8 output voltage high state v o (max) v cc =30v i source =20ma, c l =15pf 14 18 v output voltage rise time t r c l =1.0nf 120 ns output voltage fall time t f c l =1.0nf 120 ns output voltage with uvlo activated v o (uvlo) v cc =7.0v, i sink =1.0ma 0.5 v restart timer restart time delay t dly 200 s supply voltage section v cc under voltage lockout exit uvlo off v cc increasing 11.5 14.5 v v cc under voltage lockout enter uvlo on v cc decreasing 7.0 9.0 v hysteresis v hys 3.8 6.2 v v cc supply zener voltage v z 30 v supply current section stand by mode current i stand_by v cc =7.0v 0.4 ma quiescent current i q output no switching 12 ma dynamic operating current i cc 50khz, c l =1.0nf 20 ma
MC34262 preliminary cmos ic unisonic technologies co., ltd 6 of 6 www.unisonic.com.tw qw-r114-006 .a ? typical application circuit d 2 d 4 d 1 d 3 92v~268v vac rfi filter 1u c 5 1.3m r 5 12k r 3 0.01u c 2 100u c 4 0.68u c 1 mtp 14n50e q 1 0.1 r 7 10k r 1 + 330u c 3 + - 1.6m r 2 d 5 v 0 400v/0.44a + mur460 t 22k r 4 1n4934 d 6 51 7 4 2 6 3 8 figure 2. 175w power factor controller 100k r 6 d 2 d 4 d 1 d 3 92v~268v vac rfi filter 2u c 5 1.3m r 5 12k r 3 0.01u c 2 100u c 4 0.68u c 1 mtp 20n50e q 1 0.05 r 7 10k r 1 + 330u c 3 + - 1.6m r 2 d 5 v 0 400v/1.125a + mur460 t 22k r 4 1n4934 d 6 51 7 4 2 6 3 8 figure 3. 450w power factor controller 100k r 6 330 0.001u 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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