DRV8312_11 Datasheet, PDF (1/32 Pages) Texas Instruments – Three Phase PWM Motor Driver

DRV8312
DRV8332
www.ti.com
Three Phase PWM Motor Driver
Check for Samples: DRV8312, DRV8332
SLES256 – MAY 2010
FEATURES
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• High-Efficiency Power Stage (up to 97%) with
Low R_DS(on) MOSFETs (80 mΩ at T_J = 25°C)
• Operating Supply Voltage up to 50 V
(70 V Absolute Maximum)
• DRV8312 (power pad down): up to 3.5 A
Continuous Phase Current (6.5 A Peak)
• DRV8332 (power pad up): up to 8 A
Continuous Phase Current ( 13 A Peak)
• Independent Control of Three Phases
• 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
• BLDC Motors
• Three Phase Permanent Magnet Synchronous
Motors
• Inverters
• Half Bridge Drivers
• Robotic Control Systems
DESCRIPTION
The DRV8312/32 are high performance, integrated
three phase motor drivers with an advanced
protection system.
Because of the low R_DS(on) of the power 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.
The DRV8312/32 require two power supplies, one at
12 V for GVDD and VDD, and another up to 50 V for
PVDD. The DRV8312/32 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 DRV8312/32 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 DRV8312/32 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 half bridge drivers
with different power supply voltage requirements.
Simplified Application Diagram
GVDD
Controller
GVDD
GVDD_B
OTW
FAULT
PWM_A
RESET_A
PWM_B
OC_ADJ
GND
AGND
VREG
M3
M2
M1
PWM_C
RESET_C
RESET_B
VDD
GVDD_C
GVDD_A
BST_A
PVDD_A
OUT_A
GND_A
GND_B
OUT_B
PVDD_B
BST_B
NC
NC
GND
GND
GND_C
OUT_C
PVDD_C
BST_C
GVDD_C
PVDD
M
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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.
Copyright © 2010, Texas Instruments Incorporated