? semiconductor components industries, llc, 2012 december, 2012 ? rev. 0 1 publication order number: NCS37000/d NCS37000 ground fault circuit interrupter (gfci) description the NCS37000 is a fully ul943 compliant signal processor for gfci applications. the device integrates a flexible power supply (including both shunt and ldo regulators), differential fault, and grounded-neutral detection circuits. proprietary impedance measurement and signal processing techniques are used to minimize the number of external components and improve performance. the device also includes a specialized dsp controller that offers best in class immunity to nuisance loads without the need for external analog filters. features ? 6.0 ? 12 volt operation (120 ? 480 v ac mains with the appropriate series impedance) ? ? 40 to 85 c ? very low power consumption: <5 mw @ 5 v ? 16 pin qfn package or 20 pin tssop package ? single current transformer (ct) detection of both differential and grounded ? neutral faults ? self syncing internal oscillator adjusts to ac mains frequency to guarantee full resolution on 50 and 60 hz distribution systems ? optimized solenoid deployment (coil is not energized near the ac mains zero crossings) ? randomized testing sequence to minimize noise and potential interactions on the ac mains ? >5 ma scr driver for use with high igt scr?s for improved noise immunity ? superior immunity to nuisance loads/noise (up to 10 a) without loss of detection capability or ct saturation ? these devices are pb ? free, halogen free/bfr free and are rohs compliant typical applications ? load panel gfci breakers ? gfci receptacles ? in ? line gfci circuits (power cords) 1 http://onsemi.com qfn16 mn suffix case 485g marking diagrams pin connections a = assembly location l = wafer lot y = year w = work week = pb ? free package 37000 mng alyw mld ctresgn ctbias ctstim ctresd idf supply scrdrv gnd (top view) device package shipping ? NCS37000mntwg qfn16 (pb ? free) 2500/tape & reel NCS37000mng 120 units / tube ordering information NCS37000dbrg tssop20 (pb ? free) 2500/tape & reel NCS37000dbg 74 units / tube 1 ?for information on tape and reel specifications, including part orientation and tape sizes, please refer to our tape and reel packaging specification brochure, brd8011/d. 1 20 tssop ? 20 da suffix case 948e 3700 0dbg alyw
NCS37000 http://onsemi.com 2 control logic and digital filter idf supply te self trimmed rc osc waveform generator hv bandgap por brown out scrdrv driver vbias low pass filter ctbias ctstim ctresgn vss + + ? ? avdd/ dvdd mixer differential current detection grounded neutral detection offset correction g2n randomizer mains level detect (zero cross) mld ctresd testdin1 ? 5 testdout1 ? 2 figure 1. simplified block diagram
NCS37000 http://onsemi.com 3 table 1. pin function description ? qfn pin # name pad description 0 ground qfn center slug 1 mld mains level detect (zero cross) 2 ctresgn determines iv converter gain for detection threshold / matched to ct turns ratio (ground-neutral) 3 ctbias direct connection to the ct 4 ctstim direct connection to the ct 5 ctresd determines iv converter gain for detection threshold / matched to ct turns ratio (differential current) 6 idf front end noise filter capacitor 7 nc tie to ground or leave floating 8 nc float 9 nc tie to ground or leave floating 10 nc tie to ground or leave floating 11 nc tie to ground or leave floating 12 nc tie to ground or leave floating 13 nc float 14 nc float 15 scrdrv used to trigger the solenoid at a fault detection 16 supply power supply table 2. pin function description ? tssop pin # name pad description 1 ctstim differential and ground to neutral stimulus point for the current transformer 2 ground ground connection for ic 3 ctresd determines iv converter gain for detection threshold / matched to ct turns ratio (differential current) 4 idf determines corner frequency of the differential current path filter 5 gftest output to induce external differential current 6 nc tie to ground or leave floating 7 nc float 8 nc tie to ground or leave floating 9 nc tie to ground or leave floating 10 nc tie to ground or leave floating 11 ground ground connection for ic 12 nc float 13 nc float 14 scrdrv used to trigger the solenoid at a fault detection 15 dvdd internal digital 5 v regulated supply 16 avdd internal analog 5 v regulated supply 17 supply 12 v shunt regulated power supply 18 mld mains level detect (zero cross) and am slope detect (for oscillator sync/trim and am init) 19 ctresgn determines iv converter gain for detection threshold / matched to ct turns ratio (ground-neutral) 20 ctbias external 2 v bias for the current transformer
NCS37000 http://onsemi.com 4 table 3. absolute maximum ratings rating symbol value unit supply voltage range vs 6.0 to 12 v v input voltage range (note 1) v in ? 0.3 to 6.0 v output voltage range v out ? 0.3 to 6.0 v or (v in + 0.3), whichever is lower v maximum junction temperature t j(max) 140 c storage temperature range t stg ? 65 to 150 c esd capability, human body model (note 2) esd hbm 2 kv esd capability, machine model (note 2) esd mm 200 v lead temperature soldering reflow (smd styles only), pb ? free versions (note 3) t sld 260 c stresses exceeding maximum ratings may damage the device. maximum ratings are stress ratings only. functional operation above t he recommended operating conditions is not implied. extended exposure to stresses above the recommended operating conditions may af fect device reliability. 1. refer to electrical characteristics and application information for safe operating area. 2. this device series incorporates esd protection and is tested by the following methods: esd human body model tested per aec ? q100 ? 002 (eia/jesd22 ? a114) esd machine model tested per aec ? q100 ? 003 (eia/jesd22 ? a115) latchup current maximum rating: 150 ma per jedec standard: jesd78 3. for information, please refer to our soldering and mounting techniques reference manual, solderrm/d table 4. thermal characteristics rating symbol value unit thermal characteristics, qfn16, 3x3.3 mm (note 4) thermal resistance, junction ? to ? air (note 5) r ja 64 c/w thermal characteristics, tsop ? 5 (note 4) thermal resistance, junction ? to ? air (note 5) r ja 118.6 c/w 4. refer to electrical characteristics and application information for safe operating area. 5. values based on copper area of 645 mm 2 (or 1 in 2 ) of 1 oz copper thickness and fr4 pcb substrate. table 5. operating ranges (note 6) parameter conditions min typ max units operating temperature ? 40 85 c idd in typical power state 2.0 ma stimulus generator frequency tri ? tone 3.1 3.4 khz scr trigger current 8.0 ma scr trigger output voltage with 5 v supply 4.5 5.5 v fault current sensitivity programmable with ctresd 4.6 4.8 5.0 ma ground fault response time 5 ? 20 ma 150 ms ground fault response time 20 ? 40 ma 75 ms ground fault response time >40 ma 25 ms saturation fault response time >300 ma 1.4 ms ct turns ratio 200 300 ground ? neutral detection threshold total series impedance (rn and rg) 3.0 6.0 internal oscillator frequency 2.0 mhz ct stimulus current internally limited 1.0 ma ct driver closed loop bw 500 khz 6. refer to electrical characteristics and application information for safe operating area.
NCS37000 http://onsemi.com 5 applications information figure 2. typical application schematic phase resmld line load capgn resgn mld ctresgn ctbias ctstim te nc nc ctresd supply scrdrv phase capidf resmain resd idf neutral neutral nc nc nc capct capbias nc nc resct capsup solenoid tvs
NCS37000 http://onsemi.com 6 recommended external components: component type instance value note scr q1 ? on ? mcr08 diode dx ? on ? 1n4007 capacitor csup 1 ? 5 f for a full bridge rectifier capacitor cgn 2 ? 10 nf low pass corner frequency for gn detection capacitor cidf 220 nf 1khz differential corner frequency capacitor cct 2.2 ? 5 nf match to current transformer for resonance capacitor cbias 10 nf added for filtering resistor rctresd 40 ? 80k matched to current transformer resistor rctgn 100 ? 400k matched to current transformer resistor rzc 400 ? 800k zero cross detector shunt resistance resistor rmains 10 ? 20k for a full bridge rectifier tvs t1 ? ~250 ? 400 v filtering the analog signal capture portion of the ic includes a single pole filter that can be set externally with cidf. this provides an additional layer of protection against false tripping under steady state noise conditions. high frequency steady state noise is common with pumps, motors or other cyclic noise generators. cidf = 220 nf = 1 khz low pass. setting trip sensitivity the ctresd resistor sets the threshold for the differential current fault levels. increasing ctresd causes the fault levels to trip at lower dif ferential currents. ct efficiency at 60 hz must be considered. ctresd= 200*#turns ? subject to ct efficiency at 60 hz the ctresgn resistor sets the threshold for ground to neutral fault detection. the rt parameter is the desired ground to neutral resistance trip level. higher ctresgn values will cause the part to trip at higher ground to neutral impedances. ctresgn = #t urns^2 x rt/2 ? subject to ct ef ficiency from 3 khz to 4 khz setting grounded ? neutral response time cgn is used to define the response time of the grounded ? neutral detection circuit. the analog portion converts the impedance into a dc voltage and a high frequency (aliased) component. the capacitor is used to remove the high frequency component leaving just the dc representation of the impedance. ctcapgn= 1.8e-4/ctresgn
NCS37000 http://onsemi.com 7 package dimensions tssop ? 20 case 948e ? 02 issue c dim a min max min max inches 6.60 0.260 millimeters b 4.30 4.50 0.169 0.177 c 1.20 0.047 d 0.05 0.15 0.002 0.006 f 0.50 0.75 0.020 0.030 g 0.65 bsc 0.026 bsc h 0.27 0.37 0.011 0.015 j 0.09 0.20 0.004 0.008 j1 0.09 0.16 0.004 0.006 k 0.19 0.30 0.007 0.012 k1 0.19 0.25 0.007 0.010 l 6.40 bsc 0.252 bsc m 0 8 0 8 notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: millimeter. 3. dimension a does not include mold flash, protrusions or gate burrs. mold flash or gate burrs shall not exceed 0.15 (0.006) per side. 4. dimension b does not include interlead flash or protrusion. interlead flash or protrusion shall not exceed 0.25 (0.010) per side. 5. dimension k does not include dambar protrusion. allowable dambar protrusion shall be 0.08 (0.003) total in excess of the k dimension at maximum material condition. 6. terminal numbers are shown for reference only. 7. dimension a and b are to be determined at datum plane ? w ? . 110 11 20 pin 1 ident a b ? t ? 0.100 (0.004) c d g h section n ? n k k1 jj1 n n m f ? w ? seating plane ? v ? ? u ? s u m 0.10 (0.004) v s t 20x ref k l l/2 2x s u 0.15 (0.006) t detail e 0.25 (0.010) detail e 6.40 0.252 --- --- s u 0.15 (0.006) t 7.06 16x 0.36 16x 1.26 0.65 dimensions: millimeters 1 pitch soldering footprint
NCS37000 http://onsemi.com 8 package dimensions ??? ??? ??? case 485g issue f 16x seating plane l d e 0.10 c a a1 e d2 e2 b 1 4 8 9 16 notes: 1. dimensioning and tolerancing per asme y14.5m, 1994. 2. controlling dimension: millimeters. 3. dimension b applies to plated terminal and is measured between 0.25 and 0.30 mm from terminal. 4. coplanarity applies to the exposed pad as well as the terminals. b a 0.10 c top view side view bottom view pin 1 location 0.05 c 0.05 c (a3) c note 4 16x 0.10 c 0.05 c a b note 3 k 16x l1 detail a l alternate terminal constructions ?? ?? *for additional information on our pb ? free strategy and soldering details, please download the on semiconductor soldering and mounting techniques reference manual, solderrm/d. recommended 2x 0.50 pitch 1.84 3.30 1 dimensions: millimeters 0.58 16x 2x 0.30 16x outline package 2x 2x 0.10 c a b e/2 soldering footprint* dim min nom max millimeters a 0.80 0.90 1.00 a1 0.00 0.03 0.05 a3 0.20 ref b 0.18 0.24 0.30 d 3.00 bsc d2 1.65 1.75 1.85 e 3.00 bsc e2 1.65 1.75 1.85 e 0.50 bsc k 0.18 typ l 0.30 0.40 0.50 l1 0.00 0.08 0.15 on semiconductor and are registered trademarks of semiconductor components industries, llc (scillc). scillc reserves the right to mak e changes without further notice to any products herein. scillc makes no warranty, representation or guarantee regarding the suitability of its products for an y particular purpose, nor does scillc assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including wi thout limitation special, consequential or incidental damages. ?typical? parameters which may be provided in scillc data sheets and/or specifications can and do vary in different application s and actual performance may vary over time. all operating parameters, including ?typicals? must be validated for each customer application by customer?s technical experts. scillc does not convey any license under its patent rights nor the rights of others. scillc products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the scillc product could create a sit uation where personal injury or death may occur. should buyer purchase or use scillc products for any such unintended or unauthorized application, buyer shall indemnify and hold scillc and its of ficers, employees, subsidiaries, af filiates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, direct ly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that scillc was negligent regarding the design or manufacture of the part. scillc is an equal opportunity/affirmative action employer. this literature is subject to all applicable copyright laws and is not for resale in any manner. NCS37000/d publication ordering information n. american technical support : 800 ? 282 ? 9855 toll free usa/canada europe, middle east and africa technical support: phone: 421 33 790 2910 japan customer focus center phone: 81 ? 3 ? 5817 ? 1050 literature fulfillment : literature distribution center for on semiconductor p.o. box 5163, denver, colorado 80217 usa phone : 303 ? 675 ? 2175 or 800 ? 344 ? 3860 toll free usa/canada fax : 303 ? 675 ? 2176 or 800 ? 344 ? 3867 toll free usa/canada email : orderlit@onsemi.com on semiconductor website : www.onsemi.com order literature : http://www.onsemi.com/orderlit for additional information, please contact your local sales representative
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