CS294 Datasheet, PDF (1/4 Pages) Cherry Semiconductor Corporation – Ground Fault Interrupter

CS294
Ground Fault Interrupter
Description
Features
The CS294 is an AC outlet ground
fault interrupter controller IC. The
IC detects the presence of haz-
ardous grounding conditions and
open circuits the AC line before a
dangerous shock can occur.
The CS294 contains an operational
amplifier, an SCR driver and a 24V
zener shunt regulator. Two sense
coils, a bridge rectifier, a relay and
an SCR are required as external
components. The completed inter-
rupter circuit can detect and protect
against both hot wire to ground
faults and neutral wire to ground
faults.
The CS294 is built on a 30V bipolar
process and is available in 8 lead
DIP packages.
s Supply Derived from
AC Supply Ñ 24V
s Direct Interface to SCR
s Adjustable Sensitivity
s Grounded Neutral Fault
Detection
Block Diagram
Amp_OUT
+V_S
V_FB
Signal
Common
Filter
20kW
-
-
50kW
+
+
10kW
-
Bias
+
Gnd
Detect
SCR
Trigger
4.7kW
Package Options
8 Lead PDIP & SO Narrow
V_FB 1
Filter
Signal Common
Gnd
Detect
Amp_OUT
+V_S
SCR Trigger
Rev. 1/20/99
Cherry Semiconductor Corporation
2000 South County Trail, East Greenwich, RI 02818
Tel: [phone] Fax: [phone]
Email: [e-mail]
Web Site: www.cherry-semi.com
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