Document
CA3059
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
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ZERO VOLTAGE SWITCH SEMICONDUCTOR TECHNICAL DATA
RS
5
AC Input
Limiter
AC Input Voltage
100 μF + 15 −
V
* RX
12
DC Mode or 400 Hz Input
RP 14
Protection Circuit
13
+
On/Off
Sensing
Amp
9
−
10
VCC
11
Power Supply
Zero Crossing Detector
2 VCC
VCC Current RL
Boost 3
MT2
Triac
4
Drive
MT1
Gate
* NTC Sensor
Gnd 7
8
1
Inhibit
6 External Trigger
Figure 1. Representative Block Diagram
AC Input Voltage (50/60 Hz) Vac
24 120 208/230 277
Input Series Resistor (RS)
kΩ
2.0
10
20
25
Dissipation Rating for RS
W
0.5 2.0 4.0 5.0
14
1
PLASTIC PACKAGE CASE 646
ORDERING INFORMATION
Operating Device Temperature Range
Package
CA3059 TA = − 40° to +85°C Plastic DIP
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.
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.
© Semiconductor Components Industries, LLC, 2006
1
July, 2006 − Rev. 2
Publication Order Number: CA3059/D
CA3059
MAXIMUM RATINGS
DC Supply Voltage (Between Pins 2 and 7)
DC Supply Voltage (Between Pins 2 and 8)
Peak Supply Current (Pins 5 and 7) Fail−Safe Input Current (Pin 14) Output Pulse Current (Pin 4) (Note 1) Junction Temperature Operating Temperature Range Storage Temperature Range
Rating
Symbol VCC
VCC
I5,7 I14 Iout TJ TA Tstg
Value
12
12 ± 50 2.0 150 150 − 40 to + 85 − 65 to + 150
Unit Vdc
Vdc
mA mA mA °C °C °C
ELECTRICAL CHARACTERISTICS (Operation @ 120 Vrms, 50−60 Hz, TA = 25°C [Note 2])
Characteristic
Figure
Symbol
Min
Typ
Max
Unit
DC Supply Voltage Inhibit Mode RS = 10 k, IL =.