Texas Instruments DRV8832 Evaluation Module DRV8832EVM DRV8832EVM Datenbogen
Produktcode
DRV8832EVM
LED
4.2
DRV8832 EVM Jumpers and Controls
4.2.1
JP3
–
VSET Source Select
JP3 is used to select the signal source for the VSET pin of the DRV8832. If a jumper is placed between
pins 1 and 2, the pin is connected to the J3 header, so a signal can be supplied externally. If a jumper is
placed between pins 2 and 3, the signal comes from the on-board trimpot R5 (fed by the VREF output of
the DRV8832), so you can set the motor voltage (speed) by adjusting R5.
pins 1 and 2, the pin is connected to the J3 header, so a signal can be supplied externally. If a jumper is
placed between pins 2 and 3, the signal comes from the on-board trimpot R5 (fed by the VREF output of
the DRV8832), so you can set the motor voltage (speed) by adjusting R5.
4.2.2
JP1
–
IN2 Source Select
JP1 is used to select the signal source for the IN2 pin of the DRV8832. If a jumper is placed between pins
1 and 2, the pin is connected to the J3 header, so a signal can be supplied externally. If a jumper is
placed between pins 2 and 3 (as shipped), the signal comes from the toggle switch S1, which allows you
to control the motor directly.
1 and 2, the pin is connected to the J3 header, so a signal can be supplied externally. If a jumper is
placed between pins 2 and 3 (as shipped), the signal comes from the toggle switch S1, which allows you
to control the motor directly.
4.2.3
JP2
–
IN1 Source Select
JP2 is used to select the signal source for the IN1 pin of the DRV8832. If a jumper is placed between pins
1 and 2, the pin is connected to the J3 header, so a signal can be supplied externally. If a jumper is
placed between pins 2 and 3 (as shipped), the signal comes from the toggle switch S2, which allows you
to control the motor directly.
1 and 2, the pin is connected to the J3 header, so a signal can be supplied externally. If a jumper is
placed between pins 2 and 3 (as shipped), the signal comes from the toggle switch S2, which allows you
to control the motor directly.
4.2.4
R5
–
VSET Adjust
R5 allows for the generation and adjustment of the VSET voltage directly on the EVM. The VSET voltage
is derived from the VREF output of the DRV8832, divided down by the trimpot. To use R5, JP1 has to
have pins 2 and 3 connected by a jumper.
is derived from the VREF output of the DRV8832, divided down by the trimpot. To use R5, JP1 has to
have pins 2 and 3 connected by a jumper.
4.2.5
S1 and S2
–
IN2 and IN1
As noted above, if JP1 and JP2 have jumpers placed between pins 2 and 3, the toggle switches S1 and
S2 can be used to directly control the IN2 and IN1 inputs of the DRV8832. Refer to the DRV8832
datasheet (
S2 can be used to directly control the IN2 and IN1 inputs of the DRV8832. Refer to the DRV8832
datasheet (
) for details. Note that the switches are labeled on the DRV8830/32 PCB
–
S1
controls IN2, and S2 controls IN1.
5
LED
A red LED is installed on the FAULTn output that will illuminate when the FAULTn pin goes active low.
Refer to the datasheet for details on the FAULTn output.
Refer to the datasheet for details on the FAULTn output.
6
Test Points
Test points are provided on all signals that connect to the pins of the DRV8830 or DRV8832. Refer to the
schematic and PCB drawings above.
schematic and PCB drawings above.
7
Current Limit Sense Resistor (R1)
Resistor R5 on the PCB is the current limit sense resistor. A 0.25-
Ω
resistor is installed at the factory,
which corresponds to a current limit of 0.8 A. You may want to change this resistor if you wish to adjust
the current limit, or short it to defeat the current limit entirely. Refer to the datasheet for more information.
the current limit, or short it to defeat the current limit entirely. Refer to the datasheet for more information.
4
DRV8830/DRV8832 Evaluation Module
SLVU472
–
June 2011
Copyright
©
2011, Texas Instruments Incorporated