DRV8412_11 Datasheet, PDF (1/31 Pages) Texas Instruments – Dual Full Bridge PWM Motor Driver

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DRV8412
DRV8432
SLES242D – DECEMBER 2009 – REVISED JULY 2011
Dual Full Bridge PWM Motor Driver
Check for Samples: DRV8412, DRV8432
FEATURES
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• High-Efficiency Power Stage (up to 97%) with
Low R_DS(on) MOSFETs (110 mΩ at T_J = 25°C)
• Operating Supply Voltage up to 52 V
• DRV8412 (power pad down): up to 2 x 3 A
Continuous Output Current (2 x 6 A Peak) in
Dual Full Bridge Mode or 6 A Continuous
Current in Parallel Mode (12 A Peak)
• DRV8432 (power pad up): up to 2 x 7 A
Continuous Output Current ( 2 x 12 A Peak) in
Dual Full Bridge Mode or 14 A Continuous
Current in Parallel Mode (24 A Peak)
• PWM Operating Frequency up to 500 kHz
• Integrated Self-Protection Circuits Including
Undervoltage, Overtemperature, Overload, and
Short Circuit
• Programmable Cycle-by-Cycle Current Limit
Protection
• Independent Supply and Ground Pins for Each
Half Bridge
• Intelligent Gate Drive and Cross Conduction
Prevention
• No External Snubber or Schottky Diode is
Required
APPLICATIONS
• Brushed DC and Stepper Motors
• Three Phase Permanent Magnet Synchronous
Motors
• Robotic and Haptic Control System
• Actuators and Pumps
• Precision Instruments
• TEC Drivers
• LED Lighting Drivers
DESCRIPTION
The DRV8412/32 are high performance, integrated
dual full bridge motor drivers with an advanced
protection system.
The DRV8412/32 require two power supplies, one at
12 V for GVDD and VDD, and another up to 50 V for
PVDD. The DRV8412/32 can operate at up to
500-kHz switching frequency while still maintain
precise control and high efficiency. They also have an
innovative protection system safeguarding the device
against a wide range of fault conditions that could
damage the system. These safeguards are
short-circuit protection, overcurrent protection,
undervoltage protection, and two-stage thermal
protection. The DRV8412/32 have a current-limiting
circuit that prevents device shutdown during load
transients such as motor start-up. A programmable
overcurrent detector allows adjustable current limit
and protection level to meet different motor
requirements.
The DRV8412/32 have unique independent supply
and ground pins for each half bridge, which makes it
possible to provide current measurement through
external shunt resistor and support multiple motors
with different power supply voltage requirements.
Simplified Application Diagram
GVDD
Controller
GVDD
GVDD_B
OTW
GVDD_A
BST_A
FAULT
PVDD_A
PWM_A
RESET_AB
PWM_B
OC_ADJ
OUT_A
GND_A
GND_B
OUT_B
GND
AGND
VREG
M3
M2
M1
PWM_C
RESET_CD
PVDD_B
BST_B
BST_C
PVDD_C
OUT_C
GND_C
GND_D
OUT_D
PWM_D
PVDD_D
VDD
GVDD_C
BST_D
GVDD_D
PVDD
M
M
PVDD
Because of the low R_DS(on) of the H-Bridge MOSFETs
and intelligent gate drive design, the efficiency of
these motor drivers can be up to 97%, which enables
the use of smaller power supplies and heatsinks, and
are good candidates for energy efficient applications.
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Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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