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? semiconductor components industries, llc, 2014 october, 2014 ? rev. 1 1 publication order number: ncp37010/d ncs37010 self test with lockout ground fault circuit interrupter (gfci) the ncs37010 is a fully ul943 compliant signal processor for gfci applications with self test and lockout. 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. at power up the ncs37010 performs a self test at 60ms and removes the lockout if the test passes. this self test consists of a differential, ground ? neutral and solenoid test. features ? 6.0 ? 12 v operation (120 ? 480 v ac mains with the appropriate series impedance) ? ? 40 to 85 c ? very low power consumption: < 15 mw @ 6 v ? 16 pin qfn or 20 pin tssop package ? single current transformer (ct) detection of both differential and grounded ? neutral faults ? full self test and trip indicator monitoring. ? self test on power up enables lockout functionality ? 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) marking diagrams www. onsemi.com see detailed ordering and shipping information on page 10 of this data sheet. ordering information qfn16 case 485g 1 ncs 37010 alyw xxxxx = specific device code a = assembly location l = wafer lot y = year w = work week = pb ? free package (note: microdot may be in either location) 1 20 tssop ? 20 db suffix case 948e 3701 0dbg alyw pin connections mld ctresgn ctbias ctstim ctresd idf supply scrdrv gnd (top view) 1 lo led[0] lobar ptt te scrtsten gftst gnen
ncs37010 www. onsemi.com 2 gfci asic idf supply te self trimmed rc osc waveform generator hv bandgap por brown out gftst ptt scrdrv lo gnen driver vbias low pass filter ctbias ctstim ctresgn led(0) ground + + ? ? avdd / dvdd mixer digital filter differential current detection grounded neutral detection offset correction mains level detector / lockout detector scrtsten mld ctresd control logic ground fault gn detection self test gn randomizer figure 1. simplified block diagram lobar
ncs37010 www. onsemi.com 3 qfn pin description 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 gftst output to induce external differential current. 8 gnen ground ? neutral fault detection enable pin. 9 scrtsten scr/solenoid self test enable pin. 10 te tie to ground or leave floating. 11 ptt push to test input. 12 lobar load monitor input. 13 led[0] led[0] output driver. 14 lo lockout scr output driver. 15 scrdrv used to trigger the solenoid at a fault detection 16 supply power supply tssop pin description 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 gftst output to induce external differential current. 6 gnen ground ? neutral fault detection enable pin. 7 scrtsten scr/solenoid self test enable pin. 8 te tie to ground or leave floating. 9 ptt push to test input. 10 lobar load monitor input. 11 ground ground connection for ic. 12 led[0] led[0] output driver. 13 lo lockout scr output driver. 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 12v 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.
ncs37010 www. onsemi.com 4 absolute maximum ratings rating symbol value unit supply voltage range vs 6.0 to 12 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 those listed in the maximum ratings table may damage the device. if any of these limits are exceeded, device function ality should not be assumed, damage may occur and reliability may be affected. 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 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, tssop ? 20 (note 4) thermal resistance, junction ? to ? air (note 5) r ja see note above. 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 . operating ranges (note 6) parameter conditions min typ max unit operating temperature ? 40 85 c idd in typical power state 2 ma stimulus generator frequency tri ? tone 3.1 3.4 khz scr trigger current 8 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 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 6 internal oscillator frequency 2 mhz ct stimulus current internally limited 1 ma ct driver closed loop bw 500 khz product parametric performance is indicated in the electrical characteristics for the listed test conditions, unless otherwise noted. product performance may not be indicated by the electrical characteristics if operated under different conditions. 6. refer to electrical characteristics and application information for safe operating area.
ncs37010 www. onsemi.com 5 applications information figure 2. self test gfci breaker with lockout line neutral resmld load line bi ? metal led resled resd mld ctresgn ctbias ctstim scrtsten te lobar ptt ctresd idf gnen supply scrdrv leddrv lo ct phase neutral capscr s2 s3 fuse s1 reslob capidf tvs db capsup resmain resgftst test resptt capgn resgn capct capbias resct gftest
ncs37010 www. onsemi.com 6 load capgn l1 resled resd resgn mld ctresgn ctbias ctstim scrtsten te lobar ptt ctresd idf gnen supply scrdrv led[0] lo phase neut ral reslob capidf resgftst q 1 resnpn capct capbias resct resmld line capsup resmain neutral s1 tvs db reset capscr test q 2 d1 d2 d3 phase gftst figure 3. self test gfci receptacle with lockout on power up
ncs37010 www. onsemi.com 7 figure 4. self test gfci receptacle with lockout (scr test enabled) load capgn l1 resled resd resgn mld ctresgn ctbias ctstim scrtsten nc lobar ptt ctresd idf gnen supply scrdrv led[0] lo phase neutral reslob capidf resgftst q1 resnpn capct capbias resct resmld line capsup resmain neutral s1 tvs db reset capscr test q2 d1 d2 d3 resptt ct phase s2 q3 reset sw3 sw1 sw2 gftest
ncs37010 www. onsemi.com 8 load l1 resled resd mld ctresgn ctbias ctstim scrtsten te lobar ptt ctresd idf gnen supply scrdrv led[0] lo phase neutral reslob capidf resgftst q1 resnpn capct capbias resct resmld line capsup resmain neutral s1 tvs db reset test q2 d2 d3 resptt ct phase figure 5. self test gfci plug (differential only) gftst
ncs37010 www. onsemi.com 9 recommended external components: component type instance value note scr q2 ? q3 ? on ? mcr08 diode dx ? on ? 1n4007 npn q1 ? on ? mmbt6517lt1g nmos m1 on ? ntk3043k led l1 ? led pins drive opposite polarities capacitor capsup 1 ? 4.7 f for a full bridge rectifier capacitor capgn 1 ? 10 nf matched to current transformer capacitor capidf 220 nf sets the differential corner frequency at 1 khz capacitor capbias 10 nf filtering component for ctbias voltage. capacitor capct 2.2 ? 10 nf filtering and resonant capacitor for ct. capacitor capscr ? filtering component. resistor resd 40 ? 80k matched to current transformer. resistor resgn 100 ? 400k matched to current transformer. resistor resmld 400 ? 800k limiting resistor for the mains level detector (mld) input. resistor resti 400 ? 800k limiting resistor for the trip indicator(ti) input. resistor resmain 8 ? 45k full bridge rectifier power supply. resistor resgftst 1.3 ? 30k sets the external differential test current (8 ma). resistor resled 1 ? 5k sets the brightness of the leds. resistor resptt 400 ? 800k needed for the scr/solenoid test. resistor resnpn 10k bias resistor for npn gate. tvs t1 ? ~250 ? 400 v led functions device function device state status indicator (breaker) normal no power/ line load reversed off power up blink once within 3 sec (red) reset (entered through ptt) off tripped off abnormal self ? test fails (tripped) off self ? test fails (reset) blink (red) no trip on fault blink (red) self ? test fails to remove lockout blink (red)
ncs37010 www. onsemi.com 10 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. for additional filtering suggestions please contact on semiconductor. setting trip sensitivity the ctresd resistor sets the threshold for the dif ferential current fault levels. increasing ctresd causes the fault levels to trip at lower differential currents. ct efficiency at 60 hz must be considered. ctresd 200 * #turns subject 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 = #turns 2 * 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 self test automatic self test will occur every 17 minutes. if a failure is observed it will be retested every second until it passes. if it fails 3 successive tests then the gfci will indicate that it has failed self test and will trip. see the led functions table to see the different self test indicators. differential ground fault test ? tests the ct and the internal differential detection signal path by asserting the gftest output high for 1 half cycle. the test will pass if a 6 ? 8 ma differential current is enabled during this half wave. greater than 20 ma current during this test will cause a fault to be detected. ground neutral fault test ? tests the internal ground neutral stimulus and detection paths by enabling an internal 50k resistor between the ctstim and ctbias pins. if the resistor and capacitor on ctresgn are connected this will pass the gn self test. solenoid test ? asserts the scrdrv output when the voltage on mld is approximately 4 v. the ptt pin is coupled through a resistor to the output of the bridge rectifier. if the voltage at ptt drops below 2v when the scrdrv pin is asserted then the test will pass. the scrdrv output will be de ? asserted when the test passes or when it reaches the zero crossing of the mld pin. the solenoid/scr test can be disabled by tying the scrtsten pin to electronics ground. lockout on power ? up the ncs37010 will determine connection state of the load by monitoring the lobar input pin. if the load is connected it will continue performing self test every 17 minutes and monitor for differential and gn faults. if the load is not connected a self test will be performed at 60ms after power ? up. if self test passes the connection to the load will be enabled through the lo output which will be asserted for 16 ms. ptt when the ptt input pin is de ? asserted for greater than 80 ms a self test will be performed. if this test is successful the scr will be fired which will trip the gfci unit. if the test is unsuccessful the led[0] pin will flash indicating a failure. gnen the gnen pin if left floating will enable gn fault detection which will allow for a full ul943 gfci. if it is tied low then gn detection will be disabled. this setting is ideal for in ? line gfci plugs and breakers that are targeted for differential detection only. ordering information device package shipping ? ncs37010mntwg qfn16 (pb ? free) 3000 / tape & reel NCS37010DBRG tssop ? 20 (pb ? free) 2500 / tape & reel ?for information on tape and reel specifications, including part orientation and tape sizes, please refer to our tape and reel packaging specifications brochure, brd8011/d.
ncs37010 www. onsemi.com 11 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* *for additional information on our pb ? free strategy and soldering details, please download the on semiconductor soldering and mounting techniques reference manual, solderrm/d.
ncs37010 www. onsemi.com 12 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 the are registered trademarks of semiconductor components industries, llc (scillc) or its subsidia ries in the united states and/or other countries. scillc owns the rights to a number of pa tents, trademarks, copyrights, trade secret s, and other intellectual property. a listin g of scillc?s product/patent coverage may be accessed at www.onsemi.com/site/pdf/patent ? marking.pdf. scillc reserves the right to make changes without further notice to any products herein. scillc makes no warrant y, representation or guarantee regarding the suitability of it s products for any 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 without limitation special, consequential or incidental damages. ?typi cal? parameters which may be provided in scillc data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. all operating param eters, 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 right s of others. scillc products are not designed, intended, or authorized for use as components in systems intended for surgic al implant into the body, or other applications intended to s upport or sustain life, or for any other application in which the failure of the scillc product could create a situation where personal injury or death may occur. should buyer purchase or use scillc products for any such unintended or unauthorized application, buyer s hall indemnify and hold scillc and its officers , employees, subsidiaries, affiliates, and dist ributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly 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 manufac ture 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. 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 ncs37010/d 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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