DRV8412_11 Datasheet, PDF (19/31 Pages) Texas Instruments – Dual Full Bridge PWM Motor Driver

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DRV8412
DRV8432
SLES242D – DECEMBER 2009 – REVISED JULY 2011
AGND
AGND is a localized internal ground for logic signals. A 1-Ω resistor is recommended to be connected between
GND and AGND to isolate the noise from board ground to AGND. There are other two components are
connected to this local ground: 0.1-µF capacitor between VREG to AGND and Roc_adj resistor between
OC_ADJ and AGND. Capacitor for VREG should be placed close to VREG and AGND pin and connected
without vias.
Current Shunt Resistor
If current shunt resistor is connected between GND_X to GND or PVDD_X to PVDD, make sure there is only one
single path to connect each GND_X or PVDD_X pin to shunt resistor, and the path is short and symmetrical on
each sense path to minimize the measurement error due to additional resistance on the trace.
PCB LAYOUT EXAMPLE
An example of the schematic and PCB layout of DRV8412 are shown in Figure 13, Figure 14, and Figure 15.
Copyright © 2009–2011, Texas Instruments Incorporated
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