Half Bridge Drivers with DESAT

The Isolated Intelligent Half-Bridge Gate Driver Module is a compact, high-reliability solution engineered to drive both high-side and low-side power devices in half-bridge converter and inverter topologies with high precision and robust protection. The module integrates two independent single-channel 5.7 kV (rms) isolated gate driver ICs, each equipped with Desaturation (DESAT) detection and soft-turn-off, enabling safe and reliable operation of MOSFET, IGBT, and SiC power devices. A built-in isolated DC–DC power supply architecture generates +15 V and −8.7 V gate drive voltages for both high-side and low-side channels from a single 5 V input, completely eliminating the need for external isolated supplies and significantly simplifying system integration. The driver is specifically designed for high-speed, high-efficiency switching applications, ensuring clean gate transitions and minimized switching losses in half-bridge configurations. The module incorporates comprehensive protection and monitoring features, including UVLO on all gate drive supplies, DESAT-based short-circuit protection, and Active Miller Clamping for each channel, which prevents false turn-on during high dv/dt operation. For enhanced system observability and diagnostics, the module features Power, Ready (RDY) and Fault (FLT) LED indicators, allowing for real-time monitoring of both channels. Fault recovery is supported through both manual reset and microcontroller-based reset, offering flexibility for embedded control and protection coordination.

This half-bridge gate driver module is well-suited for DC–DC converters, inverter legs, motor drives, EV power electronics, renewable energy systems, and advanced research platforms, where compactness, isolation integrity, fast switching, and intelligent protection are critical.

Key Features

• Dual isolated gate driver channels for independent high-side and low-side control in half-bridge topologies

• 5.7 kV (rms) galvanic isolation per channel, ensuring high immunity against dv/dt and common-mode transients

• Integrated isolated DC–DC converter generating +15 V / −8.7 V gate drive supplies for both channels from a single 5 V input

• DESAT detection with soft turn-off for fast and safe short-circuit protection of power devices

• UVLO on all gate drive rails to prevent unsafe switching under low-supply conditions

• Active Miller Clamping on each channel to suppress false turn-on during high dv/dt switching events

• High peak gate drive current capability for fast charging and discharging of gate capacitances, enabling high-frequency operation

• Ready (RDY), Fault (FLT), and POWER LED indicators for real-time system status and diagnostics

• Manual and microcontroller-based reset support, enabling flexible fault recovery and system control

• 3.3 V / 5 V logic-level compatible inputs for direct interfacing with DSPs, MCUs, and digital controllers

• Wide device compatibility with IGBTs, Si MOSFETs, and SiC MOSFETs.