Skyworks Si823Hx GDB two-channel isolated gate driver solution

Skyworks Si823Hx GBD article image

The Si823Hx GDB is ideal for driving discrete transistors and power modules. This two-channel isolated gate driver solution features a differential digital interface, optimized on-board isolated power supply, and user-configurable turn-on and turn-off gate resistors. Status indicator LEDs and test points make evaluation and prototyping easy.

Key Features

  • Two input, high-side/low-side gate driver with dead-time control and overlap protection
  • 4 A symmetric peak output current
  • 0Ω, 1 Ω, or 4 Ω sourcing/sinking gate resistors
  • Built-in +15 V and -3.5 V isolated power supplies
  • 5 kVRMS safety rated isolation
  • 125 kV/µs common-mode transient immunity (CMTI)
  • DC bus voltage up to 800 V
  • Reverse polarity protection for 12 V input supply
  • Differential inputs for increased noise immunity
  • Module temperature (NTC) output as frequency modulated digital signal
  • Reference design available

The Si823Hx GDB is available in three different configurations. They are identical except for the gate resistor value. Choose the 0 Ω sourcing/sinking gate resistor value when connecting the GDB to the Wolfspeed SpeedVal™ Motherboard to take advantage of the gate resistors on the accompanying power modules. Choose the 1 Ω or 4 Ω gate resistor value when evaluating power modules like the Wolfspeed WolfPACK™. Select the 1 Ω sourcing/sinking gate resistor value for the lowest switching losses and fastest possible turn-on/turn-off slew rates or a 4 Ω sourcing/sinking gate resistor value for a more modest slew rate, which may reduce EMI and overshoot in the AC circuit. No matter what OPN you choose, the gate resistors are easily re-worked and re-configured to tailor your specific needs.    

A complete suite of design resources, developed in partnership with Wolfspeed, are available to jump-start your evaluation and development with the Wolfspeed SpeedVal Kit.

Design Resources

The Si823Hx GDB is offered with an extensive user guide detailing the features and specifications of the board. It additionally defines the user-configurable components on the board and how to modify them. When used in conjunction with the data sheets for the Si823Hx and Si88x2x products and their application notes, customers have an excellent foundation of resources to build a robust product design.

Wolfspeed WolfPACK Power Module Evaluation

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