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CA3059 Datasheet(PDF) 1 Page - ON Semiconductor

Part # CA3059
Description  ZERO VOLTAGE SWITCH
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Manufacturer  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

CA3059 Datasheet(HTML) 1 Page - ON Semiconductor

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FUNCTIONAL BLOCK
DESCRIPTION
1. Limiter–Power Supply — Allows operation of
the CA3059 directly from an AC line. Suggested
dropping resistor (RS) values are given in the table
below.
Figure 1. Representative Block Diagram
RL
-
RP
+
15
V
100
µF
MT2
MT1
Gate
Zero
Crossing
Detector
Power
Supply
2
AC
Input
Voltage
AC
Input
RS
5
VCC
VCC
4
*
RX
* NTC Sensor
Inhibit
External Trigger
Current
Boost 3
Triac
Drive
Limiter
14
12
11
10
9
13
Gnd
VCC
81
6
Protection
Circuit
-
+
On/Off
Sensing
Amp
7
DC Mode or
400 Hz Input
2. Differential On/Off Sensing Amplifier — Tests
for condition of external sensors or input command
signals. Proportional control capability or hysteresis
may be implemented using this block.
3. Zero–Crossing Detector — Synchronizes the
output pulses to the zero voltage point of the AC cycle.
This synchronization eliminates RFI when used with
resistive loads.
4. Triac Drive — Supplies high–current pulses to
the external power controlling thyristor.
5. Protection Circuit — A built–in circuit may be
actuated, if the sensor opens or shorts, to remove the
drive current from the external triac.
6. Inhibit Capability — Thyristor firing may be
inhibited by the action of an internal diode gate at
Pin 1.
7. High Power DC Comparator Operation —
Operation in this mode is accomplished by connecting
Pin 7 to Pin 12 (thus overriding the action of the
zero–crossing detector). When Pin 13 is positive with
respect to Pin 9, current to the thyristor is continuous.
Zero Voltage Switch
This series is designed for thyristor control in a variety of AC power
switching applications for AC input voltages of 24 V, 120 V,
208/230 V, and 277 V @ 50/60 Hz.
Applications:
Relay Control
Valve Control
Heater Control
Lamp Control
On–Off Motor Switching
Differential Comparator with Self–Contained Power Supply for
Industrial Applications
Synchronous Switching of Flashing Lights
AC Input Voltage
(50/60 Hz)
Vac
Input Series
Resistor (RS)
k
Dissipation Rating
for RS
W
24
2.0
0.5
120
10
2.0
208/230
20
4.0
277
25
5.0
ON Semiconductort
© Semiconductor Components Industries, LLC, 2001
August, 2001 – Rev. 1
1
Publication Order Number:
CA3059/D
Device
Operating
Temperature Range
Package
CA3059
SEMICONDUCTOR
TECHNICAL DATA
ZERO VOLTAGE
SWITCH
ORDERING INFORMATION
CA3059
TA = – 40° to +85°C
Plastic DIP
PLASTIC PACKAGE
CASE 646
1
14


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