User's Guide
SLVU472 – June 2011
DRV8830/DRV8832 Evaluation Module
This document is provided with the DRV8830 and DRV8832 customer evaluation module (EVM) as a
supplement to the DRV8830 (SLVSAB2) and DRV8832 (SLVSAB3) datasheets. It details the hardware
implementation of the EVM.
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Contents
Schematic ....................................................................................................................
PCB layout ...................................................................................................................
Connectors ...................................................................................................................
3.1
Control (J3) .........................................................................................................
3.2
Motor Output (J2) ..................................................................................................
3.3
Power Connector (J1) .............................................................................................
Jumpers and Controls ......................................................................................................
4.1
DRV8830 EVM Jumpers and Controls ..........................................................................
4.2
DRV8832 EVM Jumpers and Controls ..........................................................................
LED ...........................................................................................................................
Test Points ...................................................................................................................
Current Limit Sense Resistor (R1) ........................................................................................
SLVU472 – June 2011
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DRV8830/DRV8832 Evaluation Module
Copyright © 2011, Texas Instruments Incorporated
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Schematic
1
www.ti.com
Schematic
DRV8830 Only
R4
VCC
GND
2
1
C1
10uF
Header 2
1 S1 DRV8832 Only
NO
2
COMMON
3
NC
IN2
3
GND
3
JP1
IN2
1
1
2
VCC
J1
2
0
DRV8832 Only
DRV8830 Only
0
U1
C9
.1uF
2
OUT1
3
VCC
4
GND
5
OUT2
SCL/IN2
ISEN
SDA/IN1
OUT1
VCC
GND
A1/VREF
A0/VSET
FAULTn
10
SCL/IN2
9
SDA/IN1
8
A1/VREF
7
A0/VSET
6
FAULTn
2
R3
1
1
DRV8832 Only
GND
J3
TAP
DRV8832 Only
D1
FAULTn
SCL_IN2
SDA_IN1
A1/VREF
A0_VSET
FAULTn
R5
2VIN ADJ
1K
1
2
3
4
5
6
Header 6
VCC
3
DRV8830/32
3
JP2
IN1
1
3
1
3
JP4
A1 SEL
GND
2
GND
DRV8830 Only
2
GND
1
ISEN
1
VCC
OUT2
TOP
BOT
0.25
PWRPAD
R1
3
2
1 S2 DRV8832 Only
NO
2
COMMON
GND
3
NC
IN1
VCC
R2
1000
2
1
OUT2
OUT1
GND
VCC
3
J2
Header 2
DRV8832 Only
3
JP3
VSET SEL
2
2
DRV8830 Only
3
2
3
1
2
1
VCC
1
1
A0 SEL JP5
GND
2
PCB layout
2
DRV8830/DRV8832 Evaluation Module
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Connectors
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3
Connectors
3.1
Control (J3)
The control connections to the DRV8830 or DRV8832 are made through the header J3. Connections are
clearly labeled on the PCB.
Note that pins 1, 2, 3 and 4 have different meanings depending on whether a DRV8830 or DRV8832
device is mounted to the board. If using a DRV8830 with I2C interface, pin 1 is SCL (serial clock) and pin 2
is SDA (serial data); if using a DRV8832, pin 2 is IN1 and pin 1 is IN2.
Note that depending on the location of jumpers JP1, JP2 and JP4, the control pins, can either be routed
from the J3 header to the device, or be generated from the on-board switches and voltage set trimpot.
Refer to the schematic and the jumper descriptions below.
3.2
Motor Output (J2)
The motor is connected to the module through header J2, labeled OUT1 and OUT2. The polarity will affect
the direction that the motor turns – refer to the datasheet for details.
3.3
Power Connector (J1)
Power is applied to the module through header J1, labeled VCC and GND. Apply a voltage between
2.75 V and 6 V to this connector. Be sure to observe the correct polarity (VCC is positive, GND is
negative).
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Jumpers and Controls
4.1
DRV8830 EVM Jumpers and Controls
4.1.1
JP4 and JP5 – I2C Slave Address Select
JP4 and JP5 are used to select the base I2C address of the DRV8830. There are three possible states for
each of the jumpers: installing a jumper between pins 2 and 3 sets the corresponding input pin to 0,
placing a jumper between pins 1 and 2 sets the pin to 1, and leaving the jumper off sets the pin to Z
(open). The resulting base address is set as follows:
Table 1. I2C Slave Address Select
JP2
JP3
ADDRESS
(WRITE)
ADDRESS
(READ)
pin 2-3
pin 2-3
0xC0h
0xC1h
pin 2-3
open
0xC2h
0xC3h
pin 2-3
pin 1-2
0xC4h
0xC5h
open
pin 2-3
0xC6h
0xC7h
open
open
0xC8h
0xC9h
open
pin 1-2
0xCAh
0xCBh
pin 1-2
pin 2-3
0xCCh
0xCDh
pin 1-2
open
0xCEh
0xCFh
pin 1-2
pin 1-2
0xD0h
0xD1h
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3
LED
4.2
4.2.1
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DRV8832 EVM Jumpers and Controls
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.
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.
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.
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.
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 (SLVSAB3) for details. Note that the switches are labeled on the DRV8830/32 PCB – S1
controls IN2, and S2 controls IN1.
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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.
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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.
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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.
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DRV8830/DRV8832 Evaluation Module
Copyright © 2011, Texas Instruments Incorporated
SLVU472 – June 2011
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Evaluation Board/Kit Important Notice
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It is important to operate this EVM within the input voltage range of 0 V to 6 V and the output voltage range of 0 V to 6 V.
Exceeding the specified input range may cause unexpected operation and/or irreversible damage to the EVM. If there are
questions concerning the input range, please contact a TI field representative prior to connecting the input power.
Applying loads outside of the specified output range may result in unintended operation and/or possible permanent damage to the
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specification, please contact a TI field representative.
During normal operation, some circuit components may have case temperatures greater than 60°C. The EVM is designed to operate
properly with certain components above 60°C as long as the input and output ranges are maintained. These components include but are
not limited to linear regulators, switching transistors, pass transistors, and current sense resistors. These types of devices can be
identified using the EVM schematic located in the EVM User's Guide. When placing measurement probes near these devices
during operation, please be aware that these devices may be very warm to the touch.
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