MCP3020 Non-Zero-Crossing Triac driver
Description
MCP3020 Non-Zero-Crossing Triacs
The MCP3020 is an optically isolated triac driver (opto-coupler) without zero-crossing detection (non-zero-crossing). It provides galvanic isolation between electronic control circuits (e.g., microcontrollers) and power triacs used to switch AC loads (240 VAC). The component is pin-compatible with widely used industry standards such as the MOC3020, MOC3021, and MOC3022.
The MCP3020 is an optically isolated triac driver (opto-coupler) without zero-crossing detection (non-zero-crossing). It provides galvanic isolation between electronic control circuits (e.g., microcontrollers) and power triacs used to switch AC loads (240 VAC). The component is pin-compatible with widely used industry standards such as the MOC3020, MOC3021, and MOC3022.
- Input: Infrared light-emitting diode (GaAs structure)
- Output: Light-activated, bidirectional silicon switch (functions like a triac)
- Package: Typically a 6-pin DIP package (PDIP-6).
Key Features / Switching Characteristics:
- Non-zero-crossing (allows for phase-angle control and dimming; switches on immediately upon receiving a signal, rather than waiting for the next zero-crossing of the mains voltage)
- Isolation voltage: Very high electrical isolation of at least 7500 VAC (peak)
- Voltage rating: Designed for operation in 240 VAC mains systems
- Application: Driving resistive and inductive loads (e.g., motors, heaters, or for modifying vintage flash units with high-voltage ignition circuits).
Technical Data:
Input (Infrared LED)- Forward current (continuous): 50 mA or 60 mA, depending on the manufacturer
- Reverse voltage: 3 to 6 V
- Power dissipation (LED): 100 mW
Output (Phototriac)
- Peak off-state voltage: 400 V
- Peak repetitive current (100 µs, 120 pps): 1 A; output power dissipation: 300 mW
- Total device isolation test voltage (peak): 7500 VAC
- Operating temperature: -40 to +85°C