IL54123 ground fault interrupter earth IL54123 leakage current detector description the IL54123n/d is designed for use in earth leakage circuit interrupters for operation directly off the ac line in breakers. it contains pre regulator, main regulator, after regulator, differential amplifier, level comparator, latch circuit. the input in the differential amp latch circuit. the input in the differential amplifier is connect to the secondary node of zero current transformer. the level comparator generates high le vel when earth leakage current is greater than some level. feature ? low power consumption (p d =5mw) 100v/200v ? 100v/200v common built-in voltage regulator ? high gain differential amplifier ? high input sensitivity (v t = 6.1mv typ.) ? minimum external parts ordering information ? large surge margin IL54123n plastic ? wide operating temperature range (t = -40 to 85c) IL54123d soic ? high noise immunity IL54123s sip-8 ? meet u. l. 943 standards t a = -40 to 85 c for all packages . absolute maximum ratings (t^=25c) ? supply voltage 20v ? supply current 8ma 200m w - 40 to 85c - 55 to 125c ? power dissipation ? operating temperature ? storage temperature pin configuration ( top view ) v r in gnd v+ o s n r o d s c 1 2 3 4 8 7 6 5 v r in gnd v+ o s n r o d s c 1 2 3 4 8 7 6 5 1 2 3 4 8 7 6 5 v r in gnd v+ os n r o d sc 1 2 3 4 8 7 6 5
IL54123 block diagram
IL54123 recommended operating condition: t a =-30c to 80c parameter symbol min. typ. max unit supply voltage v + 12 v vs-gnd capacitor cvs 1 f o s -gnd capacitor cos 1 f electrical characteristics parameter symbol condtions temp. (c) min. typ. max. unit -30 - - 580 25 - 400 530 supply current 1 l s1 v + =12v, v r - v i = 30 mv 85 - - 480 a * trip voltage v t v + = 16v, v r - v i = x -30 85 4 6.1 9 mv (rms) differential amplifier output current 1 i td1 v + = 16 v, v r - v i = 30 mv v od = 1.2 v 25 -12 - -30 a differential amplifier output current 2 i td2 v + = 16 v, v r - v i = short v od = 0.8 v 25 17 - 37 a l si = 580 a -30 -200 - l si = 530 a 25 -100 - output current i o v sc = 1.4 v v os = 0.8 v l si = 480 a 85 -75 - a s c o n voltage v sc on v + = 16 v 25 0.7 - 1.4 v s c input current i sc on v + = l2v 25 - - 5 a output "l" current i osl v + = 12 v, v osl = 0.2 v -30 85 200 - - a input clamp voltage v ic v + = 12 v, i ic = 20 ma -30 85 4.3 - 6.7 v differential input clamp voltage v idc i idc = 100ma -30 85 0.4 - 2 v max. current voltage v sm i sm = 7 ma 25 20 - 28 v supply current 2 i s2 v os = 0.5 v, v r - v i = x -30 85 - - 1200 a latch circuit off supply voltage v+ off 25 0.5 v response time t on v + = 16 v, v r - v i = 0.3 v 25 1 - 4 ms
IL54123 typical performance curves
IL54123
IL54123
IL54123 typical application supply voltage circuit is connected as a previous diag ram. please decide constants r1, r2, c4, and c5 of a filter in order to keep at least 12v in vs, when normal supply current flows. in this case, please connect c4 (more than 1 ? ) and c2 (less than 1 ?). zct and load resistance r l of zct are connected between input pin and . in this case protective resistance (r3=100? ) must be insulted. sensitivity current is regulated by rl, and output of amplifier shows in pin . external capacitor c1 between pin and gnd is used for noise removal. when large current is grounded in the primary side (ac line) of zct, the wave form in the secondary side of zct is distorted and some signals doesn?t appear in the output of amplifier. so please connect a varistor or a diode (2pcs.) to zct in parallel. latch circuit is used to inspect the output level of am plifier and to supply gate current on the external scr. when input pin becomes more than 1.1v (typ.) latch ci rcuit operates and supply gate current in the gate of scr connected to the output pin . pin can be used in the open state, but please connect capacitor (about 0.047 ? ) between pin and . capacitor c6 between pin and gnd is used to remove noise and is about 0.047 ?.
IL54123 n suffix plastic dip (ms ? 001ba) symbol min max a 8.51 10.16 b 6.1 7.11 c 5.33 d 0.36 0.56 f 1.14 1.78 g h j 0 10 k 2.92 3.81 notes: l 7.62 8.26 1. dimensions ?a?, ?b? do not include mold flash or protrusions. m 0.2 0.36 maximum mold flas h or protrus ions 0.25 mm (0.010) per s ide. n 0.38 d suffix soic (ms - 012aa) symbol min max a 4.8 5 b 3.8 4 c 1.35 1.75 d 0.33 0.51 f 0.4 1.27 g h j 0 8 notes: k 0.1 0.25 1. dimensions a and b do not include mold flash or protrusion. m 0.19 0.25 2. maximum mold flas h or protrus ion 0.15 mm (0.006) per s ide p 5.8 6.2 for a; for b ? 0.25 mm (0.010) per s ide. r 0.25 0.5 1.27 5.72 dimens ion, mm dimens ion, mm 2.54 7.62 a b h c k c m j f m p g d r x 45 seating plane 0.25 (0.010) m t -t- 1 8 4 5 l h m j a b f g d seating plane n k 0.25 (0.010) m t -t- c 1 8 4 5
IL54123 dimension mm min max a 6.24 6.60 b 0.40 0.54 b 1.15 1.40 c 0.23 0.35 d 19.68 20.20 e 2.675 2.925 e 2.54 l 2.95 3.25 l 1 1.61 1.97 l q 0.70 z 1.21 z 1 1.40 8-pin plastic single-in-line (sip) l z b b z 1 l q l 1 d 1 8 e a e c r 0.125 m
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