The FAN73894 is a monolithic three-phase half-bridge gate-drive IC designed for high-voltage, high-speed, driving MOSFETs and IGBTs operating up to +600 V. Fairchild’s high-voltage process and common-mode noise-canceling technique provide stable operation of high-side drivers under high-dVs/dt noise circumstances.An advanced level-shift circuit allows high-side gate driver operation up to VThe protection functions include under-voltage lockout, inter-lock function and inverter over-current trip with an automatic fault-clear function. Over-current protection that terminates all six outputs can be derived from an external current-sense resistor. An open-drain fault signal is provided to indicate that an over-current or under-voltage shutdown has occurred. The UVLO circuits prevent malfunction when V and VBS are lower than the threshold voltage. Output drivers typically source and sink 350 mA and 650 mA, respectively; which is suitable for three-phase half-bridge applications in motor drive systems.
●Features
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● Floating Channel for Bootstrap Operation to +600 V
● Typically 350 mA/650 mA Sourcing/Sinking Current-Driving Capability for All Channels
● Extended Allowable Negative VS Swing to -9.8 V for Signal Propagation at VDD=VBS=15 V
● Outputs Out of Phase with Input Signals
● Over-Current Shutdown Turns Off All Six Drivers
● Matched Propagation Delay for All Channels
● 3.3 V and 5.0 V Input Logic Compatible
● Adjustable Fault-Clear Timing
● Signal Interlocking of Every Phase to Prevent Cross-Conduction
● Common-Mode dVs/dt Noise-Canceling Circuit
● Built-in Advanced Input Filter
● Built-in Soft Turn-Off Function
● Built-in Under-Voltage Lockout (UVLO) Functions for All Channels
