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january 2014 ? 2000 fairchild semiconductor corporation www.fairchildsemi.com KA2803B rev. 1.0.8 KA2803B ? earth leakage detector KA2803B earth leakage detector features ? low power consumption: 5 mw, 100 v/200 v ? built-in voltage regulator ? high-gain differential amplifier ? 0.4 ma output current pulse to trigger scrs ? low external part count ? dip & sop packages, high packing density ? high noise immunity, large surge margin ? super temperature characteristic of input sensitivity ? wide operating tem perature range: t a = -25 c to +80 c ? operation from 12 v to 20 v input functions ? differential amplifier ? level comparator ? latch circuit description the KA2803B is designed for use in earth leakage circuit interrupters, for operation directly off the ac line in breakers. the input of the differential amplifier is connected to the secondary coil of zct (zero current transformer). the amplified output of differential amplifier is integrated at external capacitor to gain adequate time delay specified in ksc4613. the level comparator generates a high level when earth leakage current is greater than the fixed level. 8-dip 8-sop ordering information part number operating temperature range package packing method KA2803B -25 to +80c 8-lead, dual inline package (dip) tube
? 2000 fairchild semiconductor corporation www.fairchildsemi.com KA2803B rev. 1.0.8 2 KA2803B ? earth leakage detector block diagram figure 1. block diagram application circuit figure 2. full-wave application circuit figure 3. hal f -wave application circuit application information (refer to full-wave application circuit in figure 2) figure 2 shows the KA2803B connected in a typical leakage current detector system. the power is applied to the v cc terminal (pin 8) directly from the power line. the resistor r s and capacitor c s are chosen so that pin 8 voltage is at least 12 v. the value of c s is recommended above 1 f. if the leakage current is at th e load, it is detected by the zero current transformer (zct). the output voltage signal of zct is amplified by the differential amplifier of the KA2803B internal circuit and appears as a half-cycle sine wave signal referred to input signal at the output of the amplifier. the amplifier closed-loop gain is fixed about 1000 times with internal feedback resistor to compensate for zero cu rrent transformer (zct) variations. the resistor r l should be selected so that the breaker satisfies the required sensing current. the protection resistor r p is not usually used when high current is injected at the br eaker; this resistor should be used to protect the earth leakage detector ic (KA2803B). the range of r p is from several hundred to several k . capacitor c 1 is for the noise canceller and a standard value of c 1 is 0.047 f. capacitor c2 is also a noise canceller capacitance, but it is not usually used. when high noise is present, a 0.047 f capacitor may be connected between pins 6 and 7. the amplified signal finally appears at the pin 7 with pulse signal through the internal latch circuit of the KA2803B. this signal drives the gate of the external scr, which energizes the trip coil, which opens the circuit breaker. the trip time of the breaker is determined by capacitor c 3 and the mechanism breaker. this capacitor should be selected under 1f to satisfy the required trip time. the full-wave bridge supplies power to the KA2803B during both the positive and neg ative half cycles of the line voltage. this allows the hot and neutral lines to be interchanged.
? 2000 fairchild semiconductor corporation www.fairchildsemi.com KA2803B rev. 1.0.8 3 KA2803B ? earth leakage detector absolute maximum ratings stresses exceeding the absolute maximum ratings may dam age the device. the device may not function or be operable above the recommended operating conditions and st ressing the parts to these levels is not recommended. in addition, extended exposure to stresses above the recomm ended operating conditions may affect device reliability. the absolute maximum ratings are stress ratings only. symbol parameter min. max. unit v cc supply voltage 20 v i cc supply current 8 ma p d power dissipation 300 mw t l lead temperature, soldering 10 seconds 260 c t a operation temperature range -25 +80 c t stg storage temperature range -65 +150 c electrical characteristics t a = -25c to +80c unless otherwise specified. symbol parameter conditions test circuit min. typ. max. units i cc supply current 1 v cc =12v v r =open v i =2 v t a = -25c figure 4 580 a t a = +25c 300 400 530 t a = +80c 480 v t trip voltage v cc =16 v, v r =2 v~2.02 v, v i =2 figure 5 14 16 18 mv (ms) note 1 12.5 14.2 17.0 i o(d) differential amplifier current current 1 v cc =16 v, v r ~v i =30 mv, v od =1.2 v figure 7 -12 20 -30 a differential amplifier current current 2 v cc =16 v, v od =0.8 v,v r , v i short=v p figure 8 17 27 37 i o output current v sc =1.4 v, v os =0.8 v, v cc =16.0 v t a = -25c figure 9 200 400 800 a t a = +25c 200 400 800 t a = +80c 100 300 600 v scon latch-on voltage v cc =16 v figure 10 0.7 1.0 1.4 v i scon latch input current v cc =16 v figure 11 -13 -7 -1 a i osl output low current v cc =12 v, v osl =0.2 v figure 12 200 800 1400 a v idc differential input clamp voltage v cc =16 v, i idc =100 ma figure 13 0.4 1.2 2.0 v v sm maximum current voltage i sm =7 ma figure 14 20 24 28 v i s2 supply current 2 v cc =12.0 v, v osl =0.6 v figure 15 200 400 900 a v soff latch-off supply voltage v os =12.0 v figure 16 7 8 9 v v sc =1.8 v i idc =100.0 ma t on response time v cc =16 v, v r -v i =0.3 v, 1 v ? 2000 fairchild semiconductor corporation www.fairchildsemi.com KA2803B rev. 1.0.8 4 test circuits figure 4. supply current 1 figure 5. trip voltage figure 6. v pn1 for v p measurement figure 7. differential amplifier output current 1 figure 8. differential amplifier output current 2 figure 9. output current
? 2000 fairchild semiconductor corporation www.fairchildsemi.com KA2803B rev. 1.0.8 5 test circuits (continued) figure 10. latch-on voltage figure 11. latch input current figure 12. output low current figure 13. differential input clamp voltage figure 14. maximum current voltage figure 15. supply current 2 figure 16. latch-off supply voltage figure 17. response time
? 2000 fairchild semiconductor corporation www.fairchildsemi.com KA2803B rev. 1.0.8 6 typical performance characteristics figure 18. supply current figure 19. differential amplifier output current (v r -v i =30 mv, v od =1.2 v) figure 20. differential amplifier output current (v r , v i =v p , v od =0.8 v) figure 21.output current figure 22. output low current figure 23. v cc v oltage vs. supply current 1
? 2000 fairchild semiconductor corporation www.fairchildsemi.com KA2803B rev. 1.0.8 7 KA2803B ? earth leakage detector typical performance characteristics (continued) figure 24. differential amplifier output current 1 figure 25.differential amplifier output figure 26. latch input current figure 27.output low current figure 28. output current figure 29. v cc v oltage vs. supply current 2
? 2000 fairchild semiconductor corporation www.fairchildsemi.com KA2803B rev. 1.0.8 8 KA2803B ? earth leakage detector typical performance characteristics (continued) figure 30. differential input clamp voltage figure 31.latch-off supply v oltage figure 32. latch-on input voltage figure 33.maximum supply figure 34. trip and output figure 35.output response time
? 2000 fairchild semiconductor corporation www.fairchildsemi.com KA2803B rev. 1.0.8 9 KA2803B ? earth leakage detector physical dimensions figure 36. 8-lead, dual inline package (dip) package drawings are provided as a service to customers consi dering fairchild components. drawings may change in any manner without notice. please note the revision and/or date on the drawi ng and contact a fairchild semiconductor representative to ver ify or obtain the most recent revision. package specifications do not expand the terms of fairchild?s worldwide terms and conditions, specifically the warranty therein, which covers fairchild products. always visit fairchild semiconductor?s online packagi ng area for the most recent package drawings: http://www.fairchildsemi.com/packaging/ . c 7 typ 7 typ .430 max [10.92] b a .400 .373 [ 10.15 9.46 ] .250.005 [6.350.13] .036 [0.9 typ] .070 .045 [ 1.78 1.14 ] .100 [2.54] .300 [7.62] .060 max [1.52] .310.010 [7.870.25] .130.005 [3.30.13] .210 max [5.33] .140 .125 [ 3.553.17 ] .015 min [0.38] .021 .015 [ 0.530.37 ] .010 +.005 -.000 [ 0.254 +0.127 -0.000 ] pin #1 pin #1 (.032) [r0.813] (.092) [?2.337] top view option 1 top view option 2 .001[.025] c n08erevg c. does not include mold flash or protrusions. dambar protrusions shall not exceed d. does not include dambar protrusions. b. controling dimensions are in inches a. conforms to jedec registration ms-001, mold flash or protrusions shall not exceed variations ba e. dimensioning and tolerancing notes: reference dimensions are in millimeters .010 inches or 0.25mm. .010 inches or 0.25mm. per asme y14.5m-1994.
? 2000 fairchild semiconductor corporation www.fairchildsemi.com KA2803B rev. 1.0.8 10 KA2803B ? earth leakage detector physical dimensions figure 37. 8-lead, small outline package (sop) package drawings are provided as a service to customers consi dering fairchild components. drawings may change in any manner without notice. please note the revision and/or date on the drawi ng and contact a fairchild semiconductor representative to ver ify or obtain the most recent revision. package specifications do not expand the terms of fairchild?s worldwide terms and conditions, specifically the warranty therein, which covers fairchild products. always visit fairchild semiconductor?s online packagi ng area for the most recent package drawings: http://www.fairchildsemi.com/packaging/ . 8 0 see detail a notes: unless otherwise specified a) this package conforms to jedec ms-012, variation aa. b) all dimensions are in millimeters. c) dimensions do not include mold flash or burrs. d) landpattern standard: soic127p600x175-8m. e) drawing filename: m08arev15 f) fairchild semiconductor. land pattern recommendation seating plane c gage plane x 45 detail a scale: 2:1 pin one indicator 4 8 1 b 5 a 5.60 0.65 1.75 1.27 6.000.20 3.900.10 4.900.10 1.27 0.420.09 0.1750.75 1.75 max 0.36 (0.86) r0.10 r0.10 0.650.25 (1.04) option a - bevel edge option b - no bevel edge 0.25 cba 0.10 0.220.30 (0.635)
? 2000 fairchild semiconductor corporation www.fairchildsemi.com KA2803B rev. 1.0.8 11 KA2803B ? earth leakage detector
www. onsemi.com 1 on semiconductor and are trademarks of semiconductor components industries, llc dba on semiconductor or its subsidiaries i n the united states and/or other countries. on semiconductor owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property . a listing of on semiconductors product/patent coverage may be accessed at www.onsemi.com/site/pdf/patent ? marking.pdf . on semiconductor reserves the right to make changes without further notice to any products herein. on semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does on semiconductor 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. buyer is responsible for its products and applications using on semiconductor products, including compliance with all laws, reg ulations and safety requirements or standards, regardless of any support or applications information provided by on semiconductor. typical parameters which may be provided in on semiconductor data sheets and/or specifications can and do vary in dif ferent applications and actual performance may vary over time. all operating parameters, including typic als must be validated for each customer application by customers technical experts. on semiconductor does not convey any license under its patent rights nor the right s of others. on semiconductor products are not designed, intended, or authorized for use as a critical component in life support systems or any fda class 3 medical devices or medical devices with a same or similar classification in a foreign jurisdiction or any devices intended for implantation in the human body. should buyer purchase or use on semicondu ctor products for any such unintended or unauthorized application, buyer shall indemnify and hold on semiconductor and its officers, employees, subsidiaries, affiliates, and distrib utors 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 on semiconductor was negligent regarding the design or manufacture of the part. on semiconductor 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 www.onsemi.com literature fulfillment : literature distribution center for on semiconductor 19521 e. 32nd pkwy, aurora, colorado 80011 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 localsales representative ? semiconductor components industries, llc

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