2012.05 ver.c copyright grenergy opto, inc. www.gr energy-ic.com 1 preliminary gl8258n/58an features primary sensing for constant-voltage(cv) and constant-current(cc) regulation pulse by pulse current limiting (ocp) low start-up current (6ua) fixed frequency for driving power mos vcc over-voltage protection output over-voltage protection cable compensation for cv regulation - (GL8258AN only) sot-26 package with few external components needed application led lighting description the gl8258n/58an is an excellent primary side feedback control pwm ic. it?s integrated constant voltage (cv) and constant current (cc) regulation functions. while it operates on cv mode, it acts as a voltage source. while it operates on cc mode, it acts as a current source. it minimizes the components counts and is available in a tiny sot-26 package. those make it an ideal design for low cost application. it provides functions of low startup current, green - mode power-saving operation, vcc over-voltage protection, and fb pin abnormal conditions sensing to prevent the circuit being damaged from the abnormal conditions. ordering and marking information sot-26 code 1 8 9 a b g h i j year 2008 2009 2010 2011 2016 2017 2018 2019 code 2 1 2 3 4 9 a b c month jan. feb. mar. apr. sep. oct. nov. dec. grenergy opto inc. reserves the right to make chang es to improve reliability or manufacture ability wi thout notice, and advise customers to obtain the latest version of relevant information to verify before placing orders. primary feedback pwm controller for flyback applica tion
2012.05 ver.c copyright grenergy opto, inc. www.gr energy-ic.com 2 preliminary gl8258n/58an pin configuration top view pin description pin no. name function 1 vcc power supply pin 2 gnd ground 3 fb connecting to a resistor divider from aux. winding to ground, the resistor divider ratio determines the aux. winding and secondary out put voltage 4 cs current sense pin, connect to sense the power mos current 5 comp voltage loop gm error amplifier output, by connecti ng an r series with c to gnd to stabilize the control loop 6 out the output driver for driving the external pow er mos absolute maximum ratings supply voltage vcc ------------------------------- --------------------------------------------------- -------------------- 28v comp, fb, cs -------------------------------------- --------------------------------------------------- ------------------- -0.3 ~ 7v out ----------------------------------------------- --------------------------------------------------- ----------------------- -0.3~13v junction temperature ------------------------------ --------------------------------------------------- -------------------- 150 c operating ambient temperature --------------------- --------------------------------------------------- ------ -20 c to 85 c storage temperature range ------------------------- --------------------------------------------------- ------- -65 c to 150 c package thermal resistance (sot-26) ------------- --------------------------------------------------- --------- 250 c/w power dissipation (sot-26, at ambient temperature = 85 c) ---------------------------------------------- -- 250mw lead temperature (soldering, 10sec) -------------- --------------------------------------------------- ---------------- 260 c esd voltage protection, human body model --------- --------------------------------------------------- ------------- 2.0 kv esd voltage protection, machine model ------------ --------------------------------------------------- --------------- 200 v
2012.05 ver.c copyright grenergy opto, inc. www.gr energy-ic.com 3 preliminary gl8258n/58an recommended operating conditions block diagram item min max unit supply voltage vcc 7 25 v vcc capacitor 2.2 10 uf comp pin capacitor 0.1 2.2 uf comp pin resistor 0 100k ohms
2012.05 ver.c copyright grenergy opto, inc. www.gr energy-ic.com 4 preliminary gl8258n/58an electrical characteristics (vcc = 15v & ta = 25c, unless otherwise specified. ) parameter symbol test conditions min typ max unit vcc section continuously operating voltage v op 25 v on threshold voltage v th-on 9.5 10.8 12 v off threshold voltage v th-off 6.3 7.0 8.0 v start-up current i cc-st vcc = 9v 6 10 a operating supply current i cc-op 1.5 ma vcc ovp v ovp 27 28 29.5 v oscillator section normal pwm frequency f osc 38 40 42 khz minimum frequency at no-load f min 500 hz error amplifier output source current i eaout 40 a output sink current i eain 40 a minimum output voltage v eamin 0.5 v green mode start voltage v eagreen 1.7 v current-sense section input impedance zcs 1 m peak current limitation v ocp 1.0 1.1 1.2 v propagation delay t pd 150 ns fb pin feedback input voltage v ref 1.96 2 2.04 v v fb variation versus vcc deviation v ref 1 % input bias current i bvs -0.3 -2 a fb ovp v ovp 2.4 2.5 2.6 v out section output low level v ol vcc = 15v, i o = 20ma 1 v output high level v oh vcc = 15v, i o = 20ma 8 v rising time t r load capacitance = 1000pf 250 ns falling time t f load capacitance = 1000pf 70 ns clamp voltage v clamp vcc = 25v, c load = 1000pf 13 v others soft start t ss 4 ms note: GL8258AN with cable compensation function.
2012.05 ver. c copyright grenergy opto, inc. www.gr energy-ic.com 6 preliminary gl8258n/58an application information the gr8258n/58an is a primary feedback pwm controller for flyback converter application. it is suitable for low output wattage below 15w and small size ac/dc converter. it is required only very few external components to achieve the application. the typical application circuit is sho wn as below fig.1. fig.1
2012.05 ver. c copyright grenergy opto, inc. www.gr energy-ic.com 7 preliminary gl8258n/58an package information sot-26 symbol sot-26 millimeters inches min. max. min. max. a 1.45 0.057 a1 0.00 0.15 0.000 0.006 a2 0.90 1.30 0.035 0.051 b 0.30 0.50 0.012 0.020 c 0.08 0.22 0.003 0.009 d 2.70 3.10 0.106 0.122 e 2.60 3.00 0.102 0.118 e1 1.40 1.80 0.055 0.071 e 0.95 bsc 0.037 bsc e1 1.90 bsc 0.075 bsc l 0.30 0.60 0.012 0.024 0 o 8 o 0 o 8 o note: 1. followed from jedec to-178 ab. 2. dimension d and e1 do not include mold flas h, protrusions or gate burrs. mold flash, protrusio ns or gate burrs shall not exceed 10 mil per side
2012.05 ver. c copyright grenergy opto, inc. www.gr energy-ic.com 8 preliminary gl8258n/58an carrier tape & reel dimensions sot-26 application a h t1 c d d w e1 f sot-26 178.0 2.00 50 min. 8.4+2.00 -0.00 13.0+0.50 -0.20 1.5 min. 20.2 min. 8.0 0.30 1.75 0.10 3.5 0.05 p0 p1 p2 d0 d1 t a0 b0 k0 4.0 0.10 4.0 0.10 2.0 0.05 1.5+0.10 -0.00 1.0 min. 0.6+0.00 -0.40 3.20 0.20 3.10 0.20 1.50 0.20 application carrier width cover tape width devices per r eel sot -26 8 5.3 3000
2012.05 ver. c copyright grenergy opto, inc. www.gr energy-ic.com 9 preliminary gl8258n/58an tape and specification reel sot 26 grenergy opto, inc. reserves the right to make corr ections, modifications, enhancements, improvements, and other changes to its products and services at any time and to dis continue any product or service without notice. cus tomers should obtain the latest relevant information before placing orders a nd should verify that such information is current a nd complete. direction of feed
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