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

PWM

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

CC

V

CC

X

BDC

V

M

V

M

27

DRV8874

www.ti.com

SLVSF66A – AUGUST 2019 – REVISED DECEMBER 2019

Submit Documentation Feedback

Copyright © 2019, Texas Instruments Incorporated

Chan. 1 = OUT1

Chan. 2 = OUT2

Chan. 3 = EN/IN1

Chan. 4 = IOUT

Figure 31. Driver PWM Operation With Current Chopping

Chan. 1 = OUT1

Chan. 2 = OUT2

Chan. 3 = EN/IN1

Chan. 4 = IOUT

Figure 32. Driver Full On Operation With Current Chopping

8.2.2 Alternative Application

In the alternative application example, the device is configured to drive a unidirectional current through two

external loads (such as two brushed DC motors) using a dual half-bridge configuration. The duty cycle of each

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

device is configured for the independent half-bridge control mode by leaving the PMODE pin floating. Since the

current regulation scheme is disabled in the independent half-bridge control mode, the VREF pin is tied to VCC.

The combined load current is monitored with an ADC from the controller to detect the voltage across RIPROPI.

Figure 33. Typical Application Schematic