HCPL 3131 A3131 Power MOSFET/IGBT Gate Drive Optocoupler IC DIP 8 Package

The HCPL-3131 / A3131 is a high-performance power MOSFET/IGBT gate drive optocoupler designed to provide safe and efficient isolation between low-voltage control circuitry and high-voltage power transistors. It integrates a high-speed LED input and a rugged output stage capable of sourcing or sinking current to drive power devices directly.

With reinforced insulation and high CMR (Common-Mode Rejection), the HCPL-3131 ensures reliable switching operation even in electrically noisy environments. It is widely used in SMPS, motor drives, and inverter applications where galvanic isolation and strong gate drive capability are required.

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Key Features

Electrical & Performance

• Gate drive capability: ±0.4A peak output current
• High isolation voltage: typically 5000 Vrms
• Fast switching: propagation delay typically 500 ns
• High CMR: up to 10 kV/µs (ensures noise immunity)
• Wide supply voltage: 15V to 30V
• Low pulse-width distortion and jitter

Design & Construction

• Integrated LED driver and gate drive transistor stage
• Reinforced insulation for safety-critical applications
• DIP-8 package, easy for through-hole PCB mounting
• TTL/CMOS compatible input

Protection & Reliability

• No latch-up
• Temperature range: –40°C to +100°C or more (depending on variant)
• Low input current LED activation

Applications

Power Switching & Control

• Driving IGBTs and power MOSFETs in high-voltage circuits
• Switch Mode Power Supplies (SMPS)
• UPS systems and solar inverters
• DC-DC converters

Motor Control

• AC and BLDC motor drives
• Industrial motor control systems requiring isolation

Industrial & High-Voltage Systems

• Isolated PWM gate drive
• High-speed isolated switching
• Isolation in power inverters and control modules

Safety & Isolation Uses

• Protecting microcontrollers from high-voltage switching stages
• Providing galvanic isolation for feedback and control loops