Detailed Hardware Description
Figure 8. OPA2374 External Amplifier
5.3
Booster Pack PWM Signals
The DRV8301 can be configured for two different PWM control modes outlined further in the DRV8301
. These control modes give PWM control through three or six independent inputs. Six-input
PWM mode gives independent control of the low-side and high-side gates for each half-bridge. Three-
input PWM mode gives control of the high side gates and low-side control by an internally generated
complementary signal with minimum internal dead time.
5.4
Booster Pack GPIO Signals
The Motor Drive Booster Pack brings out the GPIO signals for the DRV8301 to the LaunchPad XL. These
signals are described in detail in the following list and further information can be found in the DRV8301
1. nFAULT – Fault report indicator; specific fault status can be obtained through the status registers
2. nOCTW – Overcurrent, overtemperature, or both warning indicator, specific OCTW status can obtained
through the status registers
3. EN_GATE – Enables gate driver and current shunt amplifiers
4. DC_CAL – When high, device shorts inputs of shunt amplifiers and disconnects loads; the LaunchPad
XL calibrates DC offset
5.5
Hardware Files (Schematic and Gerber)
The complete design files are in the tool folder (
www.ti.com/drv8301-boosterpack
) including the schematic,
Gerbers, layout files, PCB views, and bill of materials.
8
BOOSTXL-DRV8301 Hardware User's Guide
SLVU974 – October 2013
Copyright © 2013, Texas Instruments Incorporated
