CA3059 Intersil, CA3059 Datasheet - Page 16

• Manufacturer Part Number: CA3059
• Description: ZERO VOLTAGE CROSSING SWITCH
• Manufacturer: Intersil

Specifications of CA3059

• Rohs Status: RoHS non-compliant

and the breakover voltage of the Teccor HT-32 diac.
When the voltage across C
switches and turns on the 2N3904 transistor and 1N914 diodes.
120VAC
AC
120 VAC
All Resistors 1/2 Watt
Unless Otherwise Specified
60Hz
IN
60Hz
FIGURE 35. SYNCHRONOUS SWITCHING HEAT STAGING CONTROLLER USING A SERIES OF ZERO-VOLTAGE SWITCHES
All Resistors 1/2W, Unless Otherwise Specified.
Transistors Q
Integrated Circuit N-P-N/P-N-P Transistor Array.
+
-
COMMON
IN3193 R
TYPE
1000 F
10VDC
220
K
18K
1/16A
50VDC
F
10 F
F
MT
MT
2
3
1
13
CW
2
8
FIGURE 32. RAMP GENERATOR
C
150K
2
1
2
1
, Q
10K
2W
ZVS
7
+
G
2
-
R
1.0MEG
2W
R
THERMOSTAT OR
MANUAL SWITCH
HT-32
5
2
L1
and Q
9
1.8K
1/2W
50K
CW
2
4
4
reaches approximately 32V, the diac
are Part of CA3096E
180
TYPE
IN914
Pin Connections Refer to
the CA3059
220
K
18K
MT
MT
13
2
8
Q
2
1
2
10K
TYPE
2N3904
2W
ZVS
7
G
15VDC
0.47 F
R
1 MEG
R
L2
5
R
1
9
5K
Application Note 6182
0
10
1/2W
5K
50K
CW
4
TO PIN 2
VCC +6V
IN
TO PIN 9
OUTPUT
TO PIN 7
COMMON
C
1
1
470
220
K
18K
3
2
Q
1
MT
MT
13
16
2
8
22K
R
2
1
11
1
The capacitor C
junction of the transistor. This discharge time is the retrace or fly-
back time of the ramp. The circuit shown can generate ramp
times ranging from 0.3 to 2.0 seconds through adjustment of R
For precise temperature regulation, the time base of the ramp
should be shorter than the thermal time constant of the system,
but long with respect to the period of the 60Hz line voltage. Fig-
ure 33 shows a triac connected for the proportional mode.
Figure 34(a) shows a dual output temperature controller that
drives two triacs. When the voltage V
temperature sensing network exceeds the reference voltage
V
work drops below the reference voltage V
on. Because the motors are inductive, the currents I
incoming line voltage. The motors, however, are switched by
the triacs at zero current, as shown in Figure 34(b).
The problem of driving inductive loads such as these motors
by the narrow pulses generated by the zero-voltage switch is
solved by use of the sensitive gate triac. The high sensitivity
of this device (3mA maximum) and low latching current
(approximately 9mA) permit synchronous operation of the
temperature controller circuit. In Figure 34(a), it is apparent
10K
1000 F
2W
R1
6VDC
ZVS
7
G
R
, motor No. 1 turns on. When the voltage across the net-
L3
5
10
12
9
Q
1/2W
4
+
-
50K
CW
4
1
R
100K
2
5
then discharges through the collector-to-emitter
220
K
18K
MT
MT
13
2
8
6
4
2
1
Q
10K
2
1K
2W
ZVS
7
G
R
L4
5
9
1/2W
50K
CW
2.7K
E
4
O
S
developed across the
R2
, motor No. 2 turns
220
K
18K
MT
MT
13
2
8
2
1
10K
2W
M1
ZVS
7
G
RL5
5
9
lag the
1/2W
50K
CW
4
2
.