DRV3201-Q1_16 Datasheet, PDF (20/60 Pages) Texas Instruments – DRV3201-Q1 3 Phase Motor Driver-IC for Automotive Safety Applications

DRV3201-Q1
SLVSBD6D – MAY 2012 – REVISED AUGUST 2015
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Feature Description (continued)
7.3.5.1.2 Shoot Through Detection and Programmable Dead Time
The DRV3201-Q1 provides a mechanism that prevents both external MOSFETs of each power-stage from
switching on at the same time connecting VS directly to GND. If the digital inputs try to force the device to switch
on high-side and low-side gate-drivers of one power-stage, the error is raised in the status register and the
bridges are switched according to Figure 6.
IHSx/ILSx Inputs
IHSx
ILSx
IHSx/ILSx Outputs (Programmable Dead Time Disabled)
IHSx
ILSx
IHSx/ILSx Outputs (Programmable Dead Time Enabled)
IHSx
ILSx
Dead Time
Dead Time
Figure 6. Driver Output During Input Failures
The dead time can be programmed in eight steps from 200 ns to 3000 ns in configuration register 0, bits 2:0. The
programmed dead time is valid for all three power-stages. An internal 10-MHz oscillator is used as a time
reference for creating the dead-time steps.
The dead time can be disabled in the configurable safety mode (see Configurable Safety Mode) when operating
in direct mode. PWM mode does not support disabling the programmable dead time.
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