DRV8303_15 Datasheet, PDF (18/37 Pages) Texas Instruments – Three Phase Gate Driver

DRV8303
SLOS846B – SEPTEMBER 2013 – REVISED NOVEMBER 2015
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Device Functional Modes (continued)
Current shoot through prevention protection will be enabled in the device all time independent of dead time
setting and input mode setting.
7.4.3 VDD_SPI
VDD_SPI is the power supply to power SDO pin. It must be connected to the same power supply (3.3V or 5V)
that MCU uses for its SPI operation.
During power up or down transient, VDD_SPI pin could be zero voltage shortly. During this period, no SDO
signal should be present at SDO pin from any other devices in the system because it causes a parasitic diode in
the DRV8303 conducting from SDO to VDD_SPI pin as a short. This should be considered and prevented from
system power sequence design.
7.4.4 DC_CAL
When DC_CAL is enabled, device will short inputs of shunt amplifier and disconnect from the load, so external
microcontroller can do a DC offset calibration. DC offset calibration can be also done with SPI command. If using
SPI exclusively for DC calibration, the DC_CAL pin can connected to GND.
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