CA3079 View Datasheet(PDF) - Intersil

Part Name

Description

Manufacturer

CA3079

Zero-Voltage Switches for 50Hz-60Hz and 400Hz Thyristor Control Applications

Intersil 

Oct 1999

CA3059, CA3079 N1-O88oR8uE-rICONTOTBeEcSMRhOMnSL®EiIcELNaTDolESrEPwuDRpwRpOwEoD.rPiUtnLCtCAeeTrCnsEtileM.crEoamNt T/tsc

Zero-Voltage Switches for 50Hz-60Hz and

400Hz Thyristor Control Applications

Features

Description

• Relay Control

• Valve Control

• Synchronous Switching of Flashing Lights

• On-Off Motor Switching

• Differential Comparator with Self-Contained Power

Supply for Industrial Applications

• Photosensitive Control

• Power One-Shot Control

• Heater Control

• Lamp Control

Type Features

CA3059 CA3079

• 24V, 120V, 208/230V, 277V at 50/60 . . . X

X

or 400Hz Operation

• Differential Input . . . . . . . . . . . . . . . . . . X

X

• Low Balance Input Current (Max) - µA. . . 1

2

• Built-In Protection Circuit for . . . . . . . . X

X

Opened or Shorted Sensor (Term 14)

• Sensor Range (Rx) - kΩ. . . . . . . . . . . . . 2 - 100 2 - 50

• DC Mode (Term 12) . . . . . . . . . . . . . . . . X

• External Trigger (Term 6) . . . . . . . . . . . X

• External Inhibit (Term 1) . . . . . . . . . . . . X

• DC Supply Volts (Max) . . . . . . . . . . . . . 14

10

• Operating Temperature Range (oC) . . . -55 to +125

The CA3059 and CA3079 zero-voltage switches are mono-

lithic 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:

1. Limiter-Power Supply - Permits operation directly from an

AC line.

2. Differential On/Off Sensing Amplifier - Tests the condition

of external sensors or command signals. Hysteresis or

proportional-control capability may easily be implement-

ed in this section.

3. Zero-Crossing Detector - Synchronizes the output pulses

of the circuit at the time when the AC cycle is at zero volt-

age point; thereby eliminating radio-frequency interfer-

ence (RFI) when used with resistive loads.

4. Triac Gating Circuit - Provides high-current pulses to the

gate of the power controlling thyristor.

In addition, the CA3059 provides the following important

auxiliary functions (see the Functional Block Diagram).

1. A built-in protection circuit that may be actuated to remove

drive from the triac if the sensor opens or shorts.

2. Thyristor firing may be inhibited through the action of an

internal diode gate connected to Terminal 1.

Ordering Information

PART NUMBER

CA3059

CA3079

TEMPERATURE

-55oC to +125oC

-55oC to +125oC

PACKAGE

14 Lead Plastic DIP

14 Lead Plastic DIP

3. High-power dc comparator operation is provided by over-

riding the action of the zero-crossing detector. This is ac-

complished by connecting Terminal 12 to Terminal 7.

Gate current to the thyristor is continuous when Terminal

13 is positive with respect to Terminal 9.

The CA3059 and CA3079 are supplied in 14 lead dual-in-

line plastic packages.

Pinouts

CA3059 (PDIP)

TOP VIEW

INHIBIT 1

DC SUPPLY 2

HIGH CURRENT

NEG. TRIGGER

3

TRIGGER OUT 4

AC IN 5

TRIGGER IN 6

COMMON 7

14 FAIL-SAFE

13 SENSE AMP IN

12 ZCD OVERRIDE

11 R DRIVER (COM)

10 R DRIVER V+

9 SENSE AMP REF

8 COMMON

CA3079 (PDIP)

TOP VIEW

DO NOT USE 1

DC SUPPLY 2

HIGH CURRENT

NEG. TRIGGER

3

TRIGGER OUT 4

AC IN 5

DO NOT USE 6

COMMON 7

14 DO NOT USE

13 SENSE AMP IN

12 DO NOT USE

11 R DRIVER (COM)

10 R DRIVER V+

9 SENSE AMP REF

8 COMMON

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

FN490.5

Share Link: