DRV8839_16 Datasheet, PDF (8/25 Pages) Texas Instruments – Low-Voltage Dual H-Bridge Driver IC

DRV8839
SLVSBN4B – JANUARY 2013 – REVISED DECEMBER 2015
7 Detailed Description
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7.1 Overview
The DRV8839 is an integrated motor driver solution used for brushed motor control. The device integrates two
independent ½ H-bridge, and can drive one motor in both directions or two motors in one direction. The output
driver block for each ½ H-bridge consists of N-channel power MOSFETs. An internal charge pump generates the
gate drive voltages. Protection features include overcurrent protection, short-circuit protection, undervoltage
lockout, and overtemperature protection.
The DRV8839 allows separation of the motor voltage and logic voltage if desired. If VM and VCC are less than
7 V, the two voltages may be connected.
The control interface of the DRV8839 uses INx and ENx to control each ½ H-bridge separately.
7.2 Functional Block Diagram
0 to 11V
VM
VM
1.8 to 7V
VCC
VCC
Charge
Pump
VM
Gate
Drive
OCP
VM
OUT1
Drives DC motor or
1/2 Stepper
DCM
Step
Motor
Logic
OUT2
IN1
Gate
OCP
Drive
EN1
IN2
EN2
nSLEEP
Over-
Temp
Osc
GND
8
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