DRV887x

EN/IN1

1

PH/IN2

2

nSLEEP

3

nFAULT

4

VREF

5

IPROPI

6

IMODE

7

OUT1

8

PMODE

16

GND

15

CPL

14

CPH

13

VCP

12

VM

11

OUT2

10

PGND

9

Thermal

Pad

BDC

Controller

PWM

I/O

I/O

I/O

ADC

0.1 …F

C

Bulk

V

M

0.1 …F

0.022 …F

10 k

V

CC

R

IPROPI

V

REF

R

REF2

R

REF1

V

CC

V

REF

V

CC

20

DRV8874

SLVSF66A – AUGUST 2019 – REVISED DECEMBER 2019

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Copyright © 2019, Texas Instruments Incorporated

8 Application and Implementation

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 DRV887x family of devices can be used in a variety of applications that require either a half-bridge or H-

bridge power stage configuration. Common application examples include brushed DC motors, solenoids, and

actuators. The device can also be utilized to drive many common passive loads such as LEDs, resistive

elements, relays, etc. The application examples below will highlight how to use the device in bidirectional current

control applications requiring an H-bridge driver and dual unidirectional current control applications requiring two

half-bridge drivers.

8.2 Typical Application

8.2.1 Primary Application

In the primary application example, the device is configured to drive a bidirectional current through an external

load (such as a brushed DC motor) using an H-bridge configuration. The H-bridge polarity and duty cycle are

controlled with a PWM and IO resource from the external controller to the EN/IN1 and PH/IN2 pins. The device is

configured for the PH/EN control mode by tying the PMODE pin to GND. The current limit threshold (ITRIP) is

generated with an external resistor divider from the control logic supply voltage (VCC). The device is configured

for the fixed off-time current regulation scheme by tying the IMODE pin to GND. The load current is monitored

with an ADC from the controller to detect the voltage across RIPROPI.

Figure 19. Typical Application Schematic