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irs2538dspbf 1 www.irf.com ? 201 3 international rectifier aug 16, 2013 magnetic replacement ballast ic features ? b allast control plus half - bridge drive r in one ic ? single - stage topology (no pfc stage required) ? high pf and low thd ? preheat, ignition and running lamp modes ? closed - loop lamp current con trol ? half - bridge nzvs protection ? adaptive dead - time ? lamp insert auto - restart ? internal bootstrap mosfet ? micro - power start - up current ? 15.6v internal zener clamp on vcc ? excellent esd and latch immunity ? rohs compliant ? 8 - pin so 8 package applications ? magnetic r eplacement electronic ballast ? low cost e lectronic ballast description t his ic takes full advantage of irs patented ballast and high - voltage technologies to realize a simple, high - performance magnetic ballast replacement solution. the ic includes a novel single - stage circuit topology and control method to achieve high power factor and low thd without a pfc stage or any electrolytic capacitor s . a single high - voltage pin senses the half - bridge voltage to perform necessary protection functions. closed - loop control of the lamp current provides constant lamp brightness over a wide line input voltage range. combining these high - voltage control algorithms in a single 8 - pin ic results in a large reduction in component count, an increase in manufacturability and reliability, a reduced design cycle time, while maintaining high ballast system performance. package options base part number package type standard pack orderable part number form quantity irs2538dspbf so8n tape and reel 2500 IRS2538DSTRPBF ordering information application diagram 8 - lead soic c r e s l r e s : a c d c r v c c 1 c b u s b r 1 l n f 1 m l s m h s d c p 2 c s n u b d c p 1 c v c c 2 c b s r h o r l o 1 2 3 4 8 7 6 5 i r s 2 5 3 8 d v c c c o m f b v c o l o v b v s h o r l m p 2 r l m p 1 c f b c v c o l r e s : b l r e s : c c h 1 c h 2 r c s r f b 2 2 0 v a c l i n e i n p u t c v c c 1 r l i m 1 r l i m 2 r v i g n 1 r v i g n 2 r v i g n 3 d z i g n d i g n l 1 c 1 r v c c 2
irs2538dspbf 2 www.irf.com ? 201 3 international rectifier aug 16, 2013 functional block diagram high - side half - bridge driver low - side half - bridge driver restart logic mode logic voltage controlled oscillator closed - loop current control driver logic half - bridge voltage sensing non - zvs protection uvlo bootstrap mosfet 1 2 3 4 5 6 7 8 vb ho vs lo vco fb com vcc ignition regulation
irs2538dspbf 3 www.irf.com ? 201 3 international rectifier aug 16, 2013 timing diagram t i m e v r e c t + v _ l a m p t i m e i _ l a m p r u n m o d e r e - i g n m o d e r e - i g n m o d e r u n m o d e t i m e
irs2538dspbf 4 www.irf.com ? 201 3 international rectifier aug 16, 2013 qualification information ? qualification level industrial ?? (per jede c jesd 47e) comments: this family of ics has passed jedecs industrial qualification. irs consumer qualification level is granted by extension of the higher industrial level. moisture sensitivity level so ic 8 n msl 2 ??? (per ipc/jedec j - std - 020c) esd ma chine model class a (per jedec standard eia/jesd22 - a115 - a) human body model class ic (per eia/jedec standard jesd22 - a114 - b) ic latch - up test class i, level a (per jesd78a) rohs compliant yes ? qualification standards can be found at international rec tifiers web site http://www.irf.com/ ?? higher qualification ratings may be available should the user have such requirements. please contact your international rectifier sales representative for further information. ??? higher msl ratings may be available for the specific package types listed here. please contact your international rectifier sales representative for further information.
irs2538dspbf 5 www.irf.com ? 201 3 international rectifier absolute maximum ratings absolute maximum ratings indicate sustained lim its beyond which damage to the device may occur. all voltage parameters are absolute voltages referenced to com , all currents are defined positive into any pin. the thermal resistance and power dissipation ratings are measured under board mounted and sti ll air conditions. symbol definition min. max. units v b high - side floating supply voltage - 0.3 625 v v s high - side floating supply offset voltage v b - 25 v b + 0.3 v ho high - side floating output voltage v s - 0.3 v b + 0.3 v lo low - side output voltage - 0 .3 v cc + 0.3 v vco vco input voltage - 0.3 6 v fb fb input voltage - 0.3 v cc + 0.3 i cc supply current ? --- 20 ma io max maximum allowable current at lo, ho and pfc due to external power transistor miller effect. - 500 500 dv s /dt allowable vs pin voltage slew rate - 50 50 v/ns p d maximum power dissipation @ t a ? +25oc, 8 - pin soic --- 0.625 w r ? ja thermal resistance, junction to ambient, 8 - pin soic --- 128 oc/w t j junction temperature - 55 150 oc t s storage temperature - 55 150 t l lead temperature (soldering, 10 seconds) --- 300 ? : this ic contains a voltage clamp structure between the chip vcc and com which has a nominal br eakdown voltage of 15.6 v. t his supply pin should not be driven by a dc, low impedance power source greater than the vclamp specified in the electrical characteristics section.
irs2538dspbf 6 www.irf.com ? 201 3 international rectifier recommended operating conditions for proper operation the device shou ld be used within the recommended conditions. symbol definition min. max. units v bs high - side floating supply voltage v cc - 0.7 v clamp v v s steady state high - side floating supply offset voltage - 3.0 ?? 600 v v cc supply voltage v ccuv+ + 0.1v v clamp v i c c supply current ??? 5 ma t j junction temperature - 40 125 oc ?? : care should be taken to avoid output switching conditions where the v s node rings below com by more than 5v. ??? : enough current should be supplied to the v cc pin of the ic to keep the in ternal 15.6v zener diode regulating at its voltage, v clamp .
irs2538dspbf 7 www.irf.com ? 201 3 international rectifier electrical characteristics v cc= v bs =14v, vs=0v and t a = 25c unless otherwise specified. the output voltage and current (v o and i o) parameters are referenced to com and are applicable to the resp ective ho and lo output pin s. symbol definition min typ max units test conditions low voltage supply characteristics v clamp v cc zener clamp voltage 14.5 15.5 16.5 v i cc = 10ma v ccuv+ rising v cc uvlo threshold 11.2 11.8 12.3 v ccuv - falling v cc uvlo t hreshold 8.5 9.0 9.5 v ccuvhys v cc uvlo hysteresis --- 2.8 --- i qccuv micro - power startup v cc supply current --- --- 125 a vcc = v ccuv+ - 500mv i ccfmin f min v cc supply current --- 2.2 --- ma vco 5v i ccfmax f max v cc supply current --- 3.2 --- vco = 0v i qccflt fault mode v cc supply current --- --- 300 a mode = fault, v cc = v ccuv+ floating supply characteristics i qbs quiescent v bs supply current --- 28 --- a v bsuv+ rising v bs supply uvlo threshold --- 7.2 --- v v bsuv - falling v bs supply uvlo threshold --- 6.8 --- i lk offset supply leakage current --- --- 170 ? a v b = v s = 600v ballast control characteristics f min minimum output frequency 17.4 18.3 19.4 khz vco 5v f max maximum output frequency 80.9 85.6 91.3 vco = 0v d duty cycle --- 50 --- % dt min minimum output dead - time (ho or lo) --- 0.48 --- s dt max maximum output dead - time (ho or lo) --- 1.35 --- v losd+ lo pin shutdown threshold --- 13.3 --- v mode = fault v losd - lo pin re - start threshold --- 11.1 --- v lorsthys lo pin restart hysteresis --- 2.2 --- v zvsth vs non - zvs detection threshold --- 4.6 --- lo = high
irs2538dspbf 8 www.irf.com ? 201 3 international rectifier electrical characteristics v cc= v bs =14v, vs=0v and t a = 25c unless other wise specified. the output voltage and current (v o and i o) parameters are referenced to com and are applicable to the respective ho and lo output pin s. symbol definition min typ max units test conditions preheat mode characteristics t ph preheat time --- 2.0 --- sec f line = 60hz, gbd --- 2.4 --- f line = 50hz, gbd ignition mode characteristics v loign+ lo pin ignition voltage threshold --- vcc --- v mode = re - ign run mode characteristics v fbreg+ fb pin regulation threshold 0.93 1.0 1.09 v v igndet+ fb pin ignition detection threshold 0.1 0.2 0.3 vco control characteristics i vco vco charging current 9.8 10.8 11.7 ua mode = ign i vco_zvs zvs vco discharging current --- 400 ---
irs2538dspbf 9 www.irf.com ? 201 3 international rectifier electrical characteristics v cc= v bs =14v, vs=0v and t a = 25c unless otherwise specified. the output voltage and current (v o and i o) parameters are referenced to com and are applicable to the respective ho and lo output pin s. ? symbol definition min typ max units test conditions gate driver output char acteristics (ho and lo) v oh_lo1 lo leading edge high - level output voltage --- 12.6 --- v i o = 0a v oh_lo2 lo steady state high - level output voltage --- 10.8 --- v oh_ho ho high - level output voltage --- vbs --- v ol low - level output voltage --- com --- t r output rise time --- 120 --- ns cho=1nf, clo=1nf t f output fall time --- 50 --- i o+ output source current --- 180 --- ma i o - output sink current --- 260 --- bootstrap fet characteristics vb_on vb when the bootstrap fet is on --- 14.0 --- v lo = high ib_cap vb source current when fet is on --- 23.0 --- ma cbs = 0.1uf ib_10v vb source current when fet is on --- 4.2 --- vb = 10v
irs2538dspbf 10 www.irf.com ? 201 3 international rectifier pin assignments and definitions name no. description vcc 1 logic and internal gate drive supply voltage com 2 ic power and signal ground fb 3 l amp current feedback input vco 4 voltage - controlled oscillator (vco) input lo 5 half - bridge low - side gate driver output vs 6 high voltage floating supply return and half - bridge sensing input ho 7 high - side gate driver output vb 8 high - side gate driver floating supply com fb vco vcc 1 2 3 4 7 6 5 8 i r s 2 5 3 8 d lo vs ho vb
irs2538dspbf 11 www.irf.com ? 201 3 international rectifier state diagram u v l o m o d e i q c c = i q c c u v h o = v s l o = o p e n v c o = c o m p r e h e a t m o d e f r e q = f m a x v c o = c o m i g n i t i o n m o d e f r e q = r a m p i n g d o w n r u n m o d e f b = v f b r e g r e - i g n i t i o n m o d e l a m p r e - i g n i t i o n l a m p r e - i g n i t e s l a m p e x t i n g u i s h e s l a m p i g n i t e s v c c > v c c u v + a n d l a m p i n s e r t e d t > t p h f a u l t m o d e i q c c = i q c c f l t h o = v s l o = o p e n v c o = c o m v c c < v c c u v - o r l a m p r e m o v e d l a m p d o e s n o t r e - i g n i t e l a m p e x t i n g u i s h e s l a m p d o e s n o t i g n i t e p o w e r o f f v c c = 0 v v c c > 0 v v c c < v c c u v -
irs2538dspbf 12 www.irf.com ? 201 3 international rectifier p ackage details: so8 n
irs2538dspbf 13 www.irf.com ? 201 3 international rectifier tape and reel details: so8 n carrier tape dimension for 8soicn code min max min max a 7.90 8.10 0.311 0.318 b 3.90 4.10 0.153 0.161 c 11.70 12.30 0.46 0.484 d 5.45 5.55 0.214 0.218 e 6.30 6.50 0.248 0.255 f 5.10 5.30 0.200 0.208 g 1.50 n/a 0.059 n/a h 1.50 1.60 0.059 0.062 reel dimensions for 8soicn code min max min max a 329.60 330.25 12.976 13.001 b 20.95 21.45 0.824 0.844 c 12.80 13.20 0.503 0.519 d 1.95 2.45 0.767 0.096 e 98.00 102.00 3.858 4.015 f n/a 18.40 n/a 0.724 g 14.50 17.10 0.570 0.673 h 12.40 14.40 0.488 0.566 metric imperial metric imperial e f a c d g a b h note : controlling dimension in mm loaded tape feed direction a h f e g d b c
irs2538dspbf 14 www.irf.com ? 201 3 international rectifier part marking information : so8n the information provided in this document is believed to be accurate and reliable. however, international rectifier assumes n o responsibility for the consequences of the use of this information. international rectifier assumes no responsibility for any infringement of patents or of other rights of third parties which may result from the use of this information. no license is granted by implica tion or otherwise under any patent or patent rights of international rectifier. the specifications mentioned in this document are subject to change with out notice. this document supersedes and replaces all information previously supplied. for technic al support, please contact irs technical assistance center world headquarters: 233 kansas st., el segundo, california 90245 tel: (310) 252 - 7105 s 2 5 3 8 i r l o g o y w w ? p a r t n u m b e r d a t e c o d e p i n 1 i d e n t i f i e r l o t c o d e ( p r o d m o d e C 4 d i g i t s p n c o d e ) a s s e m b l y s i t e c o d e p e r s c o p 2 0 0 - 0 0 2 ? x x x x m a r k i n g c o d e l e a d f r e e r e l e a s e d n o n - l e a d f r e e r e l e a s e d ? p

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