KA2803B Earth Leakage Detector Features Description Low Power Consumption: 5mW, 100V/200V 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. Wide Operating Temperature Range: TA = -25C to +80C Operation from 12V to 20V Input Built-In Voltage Regulator High-Gain Differential Amplifier 0.4mA 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 8-DIP Functions Differential Amplifier Level Comparator Latch Circuit 8-SOP Ordering Information Part Number Operating Temperature Range Package KA2803B -25 to +80°C 8-Lead, Dual Inline Package (DIP) KA2803BD -25 to +80°C 8-Lead, Small Outline Package (SOP) © 2000 Fairchild Semiconductor Corporation KA2803B • Rev. 1.0.7 Packing Method Tube Tape and Reel www.fairchildsemi.com KA2803B — Earth Leakage Detector December 2011 KA2803B — Earth Leakage Detector Block Diagram Figure 1. Block Diagram Application Circuit Figure 2. Full-Wave Application Circuit Figure 3. Half-Wave Application Circuit Application Information used to protect the earth leakage detector IC (KA2803B). The range of RP is from several hundred to several k. (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 VCC terminal (Pin 8) directly from the power line. The resistor RS and capacitor CS are chosen so that Pin 8 voltage is at least 12V. The value of CS is recommended above 1µF. Capacitor C1 is for the noise canceller and a standard value of C1 is 0.047µF. Capacitor C2 is also a noise canceller capacitance, but it is not usually used. When high noise is present, a 0.047µF 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 C3 and the mechanism breaker. This capacitor should be selected under 1µF to satisfy the required trip time. The full-wave bridge supplies power to the KA2803B during both the positive and negative half cycles of the line voltage. This allows the hot and neutral lines to be interchanged. If the leakage current is at the 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 current transformer (ZCT) variations. The resistor RL should be selected so that the breaker satisfies the required sensing current. The protection resistor RP is not usually used when high current is injected at the breaker; this resistor should be © 2000 Fairchild Semiconductor Corporation KA2803B • Rev. 1.0.7 www.fairchildsemi.com 2 Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only. Symbol Parameter Min. Max. Unit VCC Supply Voltage 20 V ICC Supply Current 8 mA PD Power Dissipation 300 mW TL Lead Temperature, Soldering 10 Seconds 260 °C TA Operation Temperature Range -25 +80 °C Storage Temperature Range -65 +150 °C TSTG KA2803B — Earth Leakage Detector Absolute Maximum Ratings Electrical Characteristics TA = -25°C to +80°C unless otherwise specified. Symbol ICC VT Parameter Supply Current 1 Trip Voltage Conditions Test Circuit Min. Typ. TA= -25°C VCC=12V VR=OPEN VI=2V TA= +25°C Unit s 580 Figure 4 300 400 TA= +80°C VCC=16V, VR=2V~2.02V, VI=2 Max. 530 µA 480 Figure 5 Note 1 14 16 18 12.5 14.2 17.0 mV (ms) Differential Amplifier Current Current 1 VCC=16V, VR~VI=30mV, VOD=1.2V Figure 7 -12 20 -30 Differential Amplifier Current Current 2 VCC=16V, VOD=0.8V,VR, VI Short=VP Figure 8 17 27 37 200 400 800 Output Current VSC=1.4V, VOS=0.8V, VCC=16.0V 200 400 800 100 300 600 VSCON Latch-On Voltage VCC=16V Figure 10 0.7 1.0 1.4 V ISCON Latch Input Current VCC=16V Figure 11 -13 -7 -1 µA IO(D) IO µA TA= -25°C TA= +25°C Figure 9 TA= +80°C µA IOSL Output Low Current VCC=12V, VOSL=0.2V Figure 12 200 800 1400 µA VIDC Differential Input Clamp Voltage VCC=16V, IIDC=100mA Figure 13 0.4 1.2 2.0 V VSM Maximum Current Voltage ISM=7mA Figure 14 20 24 28 V IS2 Supply Current 2 VCC=12.0V, VOSL=0.6V Figure 15 200 400 900 µA Figure 16 7 8 9 V Figure 17 2 3 4 ms VOS=12.0V VSOFF Latch-Off Supply Voltage VSC=1.8V IIDC=100.0mA tON Response Time VCC=16V, VR-VI=0.3V, 1V<VX<5V Note: 1. Guaranteed by design, not tested in production. © 2000 Fairchild Semiconductor Corporation KA2803B • Rev. 1.0.7 www.fairchildsemi.com 3 KA2803B — Earth Leakage Detector Test Circuits Figure 4. Supply Current 1 Figure 5. Trip Voltage Figure 6. VPN1 for VP Measurement Figure 7. Differential Amplifier Output Current 1 Figure 8. Differential Amplifier Output Current 2 Figure 9. Output Current © 2000 Fairchild Semiconductor Corporation KA2803B • Rev. 1.0.7 www.fairchildsemi.com 4 KA2803B — Earth Leakage Detector 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 KA2803B • Rev. 1.0.7 www.fairchildsemi.com 5 KA2803B — Earth Leakage Detector Typical Performance Characteristics Figure 18. Figure 20. Supply Current Figure 19. Differential Amplifier Output Current (VR, VI=VP, VOD=0.8V) Figure 22. Figure 21. Output Low Current © 2000 Fairchild Semiconductor Corporation KA2803B • Rev. 1.0.7 Differential Amplifier Output Current (VR-VI=30mV, VOD=1.2V) Figure 23. Output Current VCC Voltage vs. Supply Current 1 www.fairchildsemi.com 6 KA2803B — Earth Leakage Detector Typical Performance Characteristics (Continued) Figure 24. Differential Amplifier Output Current 1 Figure 26. Figure 28. Figure 25. Latch Input Current Figure 27. Output Current © 2000 Fairchild Semiconductor Corporation KA2803B • Rev. 1.0.7 Differential Amplifier Output Figure 29. Output Low Current VCC Voltage vs. Supply Current 2 www.fairchildsemi.com 7 KA2803B — Earth Leakage Detector Typical Performance Characteristics (Continued) Figure 30. Differential Input Clamp Voltage Figure 32. Figure 31. Latch-On Input Voltage Figure 34. Figure 33. Trip and Output © 2000 Fairchild Semiconductor Corporation KA2803B • Rev. 1.0.7 Latch-Off Supply Voltage Figure 35. Maximum Supply Output Response Time www.fairchildsemi.com 8 KA2803B — Earth Leakage Detector Physical Dimensions [ ] .400 10.15 .373 9.46 A .036 [0.9 TYP] (.092) [Ø2.337] (.032) [R0.813] PIN #1 .250±.005 [6.35±0.13] PIN #1 B TOP VIEW OPTION 1 TOP VIEW OPTION 2 [ ] .070 1.78 .045 1.14 .310±.010 [7.87±0.25] .130±.005 [3.3±0.13] .210 MAX [5.33] 7° TYP 7° TYP C .015 MIN [0.38] .140 3.55 .125 3.17 [ ] .021 0.53 .015 0.37 .001[.025] C .300 [7.62] [ ] .100 [2.54] .430 MAX [10.92] .060 MAX [1.52] NOTES: A. CONFORMS TO JEDEC REGISTRATION MS-001, VARIATIONS BA B. CONTROLING DIMENSIONS ARE IN INCHES REFERENCE DIMENSIONS ARE IN MILLIMETERS C. DOES NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCHES OR 0.25MM. D. DOES NOT INCLUDE DAMBAR PROTRUSIONS. DAMBAR PROTRUSIONS SHALL NOT EXCEED .010 INCHES OR 0.25MM. E. DIMENSIONING AND TOLERANCING PER ASME Y14.5M-1994. [ .010+.005 0.254+0.127 -.000 -0.000 ] N08EREVG Figure 36. 8-Lead, Dual Inline Package (DIP) Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify 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 packaging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/. © 2000 Fairchild Semiconductor Corporation KA2803B • Rev. 1.0.7 www.fairchildsemi.com 9 5.00 4.80 A 0.65 3.81 5 8 B 1.75 6.20 5.80 PIN ONE INDICATOR 4.00 3.80 1 5.60 KA2803B — Earth Leakage Detector Physical Dimensions 4 1.27 (0.33) 1.27 0.25 C B A LAND PATTERN RECOMMENDATION SEE DETAIL A 0.25 0.10 0.25 0.19 C 1.75 MAX 0.51 0.33 0.10 C OPTION A - BEVEL EDGE 0.50 x 45° 0.25 R0.10 GAGE PLANE R0.10 OPTION B - NO BEVEL EDGE 0.36 NOTES: UNLESS OTHERWISE SPECIFIED 8° 0° 0.90 0.40 A) THIS PACKAGE CONFORMS TO JEDEC MS-012, VARIATION AA, ISSUE C, B) ALL DIMENSIONS ARE IN MILLIMETERS. C) DIMENSIONS DO NOT INCLUDE MOLD FLASH OR BURRS. D) LANDPATTERN STANDARD: SOIC127P600X175-8M. E) DRAWING FILENAME: M08AREV13 SEATING PLANE (1.04) DETAIL A SCALE: 2:1 Figure 37. 8-Lead, Small Outline Package (SOP) Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify 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 packaging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/. © 2000 Fairchild Semiconductor Corporation KA2803B • Rev. 1.0.7 www.fairchildsemi.com 10 KA2803B — Earth Leakage Detector © 2000 Fairchild Semiconductor Corporation KA2803B • Rev. 1.0.7 www.fairchildsemi.com 11