TD3043
Zero-Volt Switching
Triac Driver
The TD3043 consists of a single input LED optically coupled to a zero-volt crossing triac driver. The TD3043 provides high input-to-output
isolation and is designed to drive high-powered triacs. Typical uses include interfacing logic level control signals to equipment powered
from 110Vac and 220Vac lines.
DESCRIPTION
FEATURES APPLICATIONS
OPTIONS/SUFFIXES
SCHEMATIC DIAGRAM
MAXIMUM RATINGS
APPROVALS
Zero-volt switching
•
400V blocking voltage
•
High input-to-output isolation
•
High reliability
•
5mA turn-on current
•
Home appliances
•
Motor control
•
Solid state relays
•
Valve control
•
Solenoids
•
Exercise equipment
•
High Output Isolation
• -H
Surface Mount Option
• -S
Tape and Reel
• -TR
PARAMETER UNIT MIN TYP MAX
Storage Temperature °C -55 125
Operating Temperature °C -40 85
Continuous Input Current mA 40
Transient Input Current mA 400
Reverse Input Control
Voltage
V 6
Output Power Dissipation mW 500
1
2
+ Input
- Input
3
6
5
4
+/- AC Outp
u
Do Not Use
-/+ AC Outp
u
rev 1.0 Solid State Optronics, Inc.
1.888.377.4776
www.ssousa.com
TD3043
Zero-Volt Switching
Triac Driver
ELECTRICAL CHARACTERISTICS - 25°
PARAMETER UNIT MIN TYP MAX TEST CONDITIONS
INPUT SPECIFICATIONS
LED Forward Voltage V1.2 1.5 If = 10mA
LED Reverse Voltage V612 Ir = 10uA
Turn-On Current m52.5 Io = 100mA
A
Turn-Off Current m0.5
A
OUTPUT SPECIFICATIONS
Blocking Voltage V400 Io = 1uA
Continuous Load Current m100 Iin = 5mA
A
Holding Current µ250
A
Leakage Current µ1Vo = 400V
A
On-State Voltage V2 3 Iin = 5mA
Critical Rate of Rise V1000 1500
/µs
COUPLED SPECIFICATIONS
Isolation Voltage V2500 T = 1 minute
-H Suffix V3750 T = 1 minute
Coupled Capacitance p2
F
rev 1.0 Solid State Optronics, Inc.
1.888.377.4776
www.ssousa.com
TD3043
Zero-Volt Switching
Triac Driver
PERFORMANCE DATA
0
10
20
30
40
50
60
425 450 475 500 525 550 575 600
Blocking Voltage (V)
Device Count
TD3043
Typical Blocking Voltage Distribution
N = 100, Ambient Temperature = 25°C
0
20
40
60
80
100
120
-40-200 20406080
Temperature (C)
Load Current (mA)
TD3043
Typical Load Current vs. Temperature
5 V
Threshold
Input Signal
SCR #1 Turns On when
5V threshold is reached.
SCR #1 Turns Off,
SCR #2 Turns On
at Zero Volts.
SCR #2 Turns Off,
SCR #1 Turns On
at Zero Volts.
SCR #1 and Relay Turn
Off at Zero Volts.
5
4
26
3
1Relay Input Signal is
Turned On.
Relay Input Signal is
Turned Off.
This solid state relay has been designed with a driver circuit that controls the operation of two back-to-back silicon controlled rectifiers (SCRs),
each responsible for one half of the AC cycle. If an AC signal is examined, the turn on, turn off and zero-volt switching can be seen. Figure 1
shows a typical 60 Hz, 120Vac signal with a corresponding relay input signal:
ZERO-VOLT SWITCHING
Figure 1 shows the sequence of zero-volt switching operation. At Stage 1, an input signal is applied to the relay. The relay will not turn on
until the threshold voltage of 5V is reached. Once this point is reached (Stage 2), SCR #1 (designated as the SCR which controls positive AC
voltage) turns on. However, SCR #1 only conducts for an instant, as the cycle quickly crosses zero. At this point (Stage 3), SCR #1 will turn
off and SCR #2 (negative AC voltage) turns on. Likewise, at the next zero cross (Stage 4), SCR #2 will turn off and SCR #1 conducts again.
Even though the input signal is terminated at Stage 5, the relay will continue to conduct (typical SCR behavior) until Stage 6, when SCR #1
crosses zero and ceases to conduct. Please note that turn on can likewise begin on the negative phase of the AC cycle with a -5V threshold,
though only the positive phase is shown here.
rev 1.0 Solid State Optronics, Inc.
1.888.377.4776
www.ssousa.com
TD3043
Zero-Volt Switching
Triac Driver
MECHANICAL DIMENSIONS
6 PIN DUAL IN-LINE PACKAGE 6 PIN SURFACE MOUNT DEVICE
END VIEW END VIEW
TOP VIEW TOP VIEW
BOTTOM VIEW/
BOARD PATTER
N
BOTTOM VIEW/
BOARD PATTER
N
rev 1.0 Solid State Optronics, Inc.
1.888.377.4776
www.ssousa.com