CT
T
OD U
ME N
E PR PLACE at
T
OL E
RE
nter m/tsc
OBS ENDED
rt C e
MM l Suppo tersil.co
ECO
a
.in
NO R Technic or www
ur
IL
o
S
TER
8-IN
1-88
®
Oct 1999
CA3059, CA3079
Zero-Voltage Switches for 50Hz-60Hz and
400Hz Thyristor Control Applications
Features
Description
• Relay Control
The CA3059 and CA3079 zero-voltage switches are monolithic silicon integrated circuits designed to control a thyristor
in a variety of AC power switching applications for AC input
voltages of 24V, 120V, 208/230V, and 277V at 50Hz-60Hz
and 400Hz. Each of the zero-voltage switches incorporates
4 functional blocks (see the Functional Block Diagram) as
follows:
• Valve Control
• Synchronous Switching of Flashing Lights
• On-Off Motor Switching
• Differential Comparator with Self-Contained Power
Supply for Industrial Applications
• Photosensitive Control
1. Limiter-Power Supply - Permits operation directly from an
AC line.
• Power One-Shot Control
• Heater Control
2. Differential On/Off Sensing Amplifier - Tests the condition
of external sensors or command signals. Hysteresis or
proportional-control capability may easily be implemented in this section.
• Lamp Control
Type Features
CA3059 CA3079
• 24V, 120V, 208/230V, 277V at 50/60 . . .
or 400Hz Operation
X
X
• Differential Input . . . . . . . . . . . . . . . . . .
X
X
• Low Balance Input Current (Max) - µA. . .
1
2
• Built-In Protection Circuit for . . . . . . . .
Opened or Shorted Sensor (Term 14)
X
X
3. Zero-Crossing Detector - Synchronizes the output pulses
of the circuit at the time when the AC cycle is at zero voltage point; thereby eliminating radio-frequency interference (RFI) when used with resistive loads.
4. Triac Gating Circuit - Provides high-current pulses to the
gate of the power controlling thyristor.
• Sensor Range (Rx) - kΩ. . . . . . . . . . . . . 2 - 100 2 - 50
• DC Mode (Term 12) . . . . . . . . . . . . . . . .
• External Trigger (Term 6) . . . . . . . . . . .
X
• External Inhibit (Term 1) . . . . . . . . . . . .
In addition, the CA3059 provides the following important
auxiliary functions (see the Functional Block Diagram).
X
X
• DC Supply Volts (Max) . . . . . . . . . . . . .
oC) .
• Operating Temperature Range (
..
14
1. A built-in protection circuit that may be actuated to remove
drive from the triac if the sensor opens or shorts.
10
2. Thyristor firing may be inhibited through the action of an
internal diode gate connected to Terminal 1.
-55 to +125
3. High-power dc comparator operation is provided by overriding the action of the zero-crossing detector. This is accomplished by connecting Terminal 12 to Terminal 7.
Gate current to the thyristor is continuous when Terminal
13 is positive with respect to Terminal 9.
Ordering Information
PART NUMBER
TEMPERATURE
-55oC
CA3059
o
CA3079
to
+125oC
o
-55 C to +125 C
PACKAGE
14 Lead Plastic DIP
The CA3059 and CA3079 are supplied in 14 lead dual-inline plastic packages.
14 Lead Plastic DIP
Pinouts
CA3059 (PDIP)
TOP VIEW
INHIBIT 1
DC SUPPLY 2
HIGH CURRENT 3
NEG. TRIGGER
TRIGGER OUT 4
AC IN 5
TRIGGER IN 6
COMMON 7
CA3079 (PDIP)
TOP VIEW
14 FAIL-SAFE
DO NOT USE 1
13 SENSE AMP IN
DC SUPPLY 2
13 SENSE AMP IN
HIGH CURRENT 3
NEG. TRIGGER
TRIGGER OUT 4
11 R DRIVER (COM)
V+
9 SENSE AMP REF
12 DO NOT USE
AC IN 5
12 ZCD OVERRIDE
10 R DRIVER
14 DO NOT USE
10 R DRIVER V+
DO NOT USE 6
8 COMMON
COMMON 7
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2002. All Rights Reserved
3
11 R DRIVER (COM)
9 SENSE AMP REF
8 COMMON
FN490.5