Three-Phase Gate Driver For Vehicles Operates To 200 V

El Segundo, Calif., U.S.: The automotive-qualified AUIRS20302S three-phase gate driver IC from International Rectifier is designed for vehicle applications including high-voltage air conditioner compressors, pumps, brushless direct current (BLDC) motor drives up to 600 W, and high-voltage motor drives (see the figure).

The AUIRS20302S targets 12-V, 24-V, and 48-V boardnet automotive platforms operating at voltages up to 200 V maximum. It features an external pre-regulator to generate its own supply voltage to ensure that the gate drives do not exceed 17 V even during load dump conditions. The pre-regulator VPR pin can also supply the surrounding system components if the total consumption does not exceed 100 mA.

The IC can drive six N-channel power MOSFETs or IGBTs using a bootstrap technique to supply the high-side driving circuitry. It also features embedded deadtime and cross-conduction prevention functions and under-voltage and over-current protection with diagnostics.

Proprietary high-voltage IC (HVIC) and latch immune CMOS technologies enable ruggedised monolithic construction. The logic input is compatible with standard CMOS or low-power Schottky transistor-transistor logic (LSTTL) outputs, down to 3.3-V logic. The output driver features a high pulse current buffer stage designed for minimum driver cross-conduction. Propagation delays are matched to simplify use in high-frequency applications.

International Rectifier