CS294
CS294
Ground Fault Interrupter
Description
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.
Features
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
20kW
Signal
Common
10kW
Filter
Bias
-
+
50kW
-
+
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
Gnd
Detect
Cherry Semiconductor Corporation
2000 South County Trail, East Greenwich, RI 02818
Tel: (401)885-3600 Fax: (401)885-5786
Email: info@cherry-semi.com
Web Site: www.cherry-semi.com
Rev. 1/20/99
1
A
¨
Company
CHERRY [ CHERRY SEMICONDUCTOR CORPORATION ]
