DRV8813_15 Datasheet, PDF (8/27 Pages) Texas Instruments – DRV8813 Dual-Bridge Motor Controller IC

DRV8813
SLVSA72E – APRIL 2010 – REVISED OCTOBER 2015
7 Detailed Description
www.ti.com
7.1 Overview
The DRV8813 is an integrated motor driver solution for a bipolar stepper motor or two brushed DC motors. The
device integrates two NMOS H-bridges, current sense, regulation circuitry, and detailed fault detection. The
DRV8813 can be powered with a supply voltage from 8.2 V to 45 V, and is capable of providing an output current
up to 2.5 A full-scale.
A PHASE/ENBL interface allows for simple interfacing to the controller circuit. The winding current control allows
the external controller to adjust the regulated current that is provided to the motor. The current regulation is
highly configurable, with three decay modes of operation. Fast, slow, and mixed decay can be selected
depending on the application requirements.
A low-power sleep mode is included, which allows the system to save power when not driving the motor.
7.2 Functional Block Diagram
VM
VM
V3P3OUT
3.3 V
3.3V
AVREF
BVREF
APHASE
AENBL
AI0
AI1
BPHASE
BENBL
BI0
BI1
DECAY
nRESET
nSLEEP
nFAULT
Internal
Reference &
Regs
Thermal
Shut down
Int. VCC
LS Gate
Drive
Charge
Pump
HS Gate
Drive
CP1
0.01mF
CP2
VM
VCP
0.1mF
VMA
1MW
VM
Motor
Driver A
AOUT1
DCM
AOUT2
ISENA
+
Step
Motor
-
+-
Control
Logic
Motor
Driver B
VM
VMB
BOUT1
DCM
BOUT2
ISENB
GND
GND
8
Submit Documentation Feedback
Product Folder Links: DRV8813
Copyright © 2010–2015, Texas Instruments Incorporated