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RV4145 Datasheet(PDF) 1 Page - Fairchild Semiconductor |
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RV4145 Datasheet(HTML) 1 Page - Fairchild Semiconductor |
1 / 11 page ![]() www.fairchildsemi.com REV. 1.0.3 3/6/02 Features • No potentiomenter required • Direct interface to SCR • Supply voltage derived from AC line – 26V shunt • Adjustable sensitivity Description The RV4145A is a low power controller for AC outlet ground fault interrupters. These devices detect hazardous grounding conditions, such as equipment (connected to opposite phases of the AC line) in contact with a pool of water and open circuits the line before a harmful or lethal shock occurs. Contained internally are a 26V zener shunt regulator, an op amp, and an SCR driver. WIth the addition of two sense transformers, a bridge rectifier, an SCR, a relay, and a few additional components, the RV4145A will detect and protect against both hot wire to ground and neutral wire to ground faults. The simple layout and conventional design ensure ease of application and long-term reliability. Block Diagram R2 10K R1 10K +VS (+26V) SCR Trigger VFB +Input Ground R3 4.7K 65-4145A-01 RV4145A Op Amp Output 6.5V 6.5V 6.5V 6.5V VREF (+13V) RV4145A Low Power Ground Fault Interrupter • Grounded neutral fault detection • Meets U.L. 943 standards • 450µA quiescent current • Ideal for 120V or 220V systems |
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