DRV8837C Datasheet, PDF (11/21 Pages) Texas Instruments – 1-A Low-Voltage H-Bridge Driver

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8 Application and Implementation
DRV8837C
SLVSD61A – JULY 2016 – REVISED JULY 2016
NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
8.1 Application Information
The DRV8837C device is device is used to drive one DC motor or other devices like solenoids. The following
design procedure can be used to configure the DRV8837C device.
8.2 Typical Application
VM
0.1 µF
M
DRV8837C
1
8
VM
VCC
2
7
OUT1
nSLEEP
3
6
OUT2
IN1
4
5
GND
IN2
VCC
0.1 µF
Copyright © 2016, Texas Instruments Incorporated
Figure 7. Schematic of DRV8837C Application
8.2.1 Design Requirements
Table 4 lists the required parameters for a typical usage case.
Table 4. System Design Requirements
DESIGN PARAMETER
Motor supply voltage
Logic supply voltage
Target RMS current
REFERENCE
VM
VCC
I_OUT
EXAMPLE VALUE
9V
3.3 V
0.8 A
8.2.2 Detailed Design Procedure
8.2.2.1 Motor Voltage
The appropriate motor voltage depends on the ratings of the motor selected and the desired RPM. A higher
voltage spins a brushed dc motor faster with the same PWM duty cycle applied to the power FETs. A higher
voltage also increases the rate of current change through the inductive motor windings.
8.2.2.2 Low-Power Operation
When entering sleep mode, TI recommends setting all inputs as a logic low to minimize system power.
Copyright © 2016, Texas Instruments Incorporated
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