DRV8302 Datasheet, PDF (1/21 Pages) Texas Instruments – Three Phase Pre-Driver with Dual Current Shunt Amplifiers and Buck Regulator – Hardware Controlled

DRV8302
www.ti.com
SLES267 – AUGUST 2011
Three Phase Pre-Driver with Dual Current Shunt Amplifiers and Buck Regulator –
Hardware Controlled
Check for Samples: DRV8302
FEATURES
1
• Operating Supply Voltage 8V–60V
• 2.3A Sink and 1.7A Source Gate Drive Current
Capability
• Integrated Dual Shunt Current Amplifiers With
Adjustable Gain and Offset
• Integrated Buck Converter to Support up to
1.5A External Load
• Independent Control of 3 or 6 PWM Inputs
• Bootstrap Gate Driver With 100% Duty Cycle
Support
• Programmable Dead Time to Protect External
FETs from Shoot Through
• Programmable Overcurrent Protection of
External MOSFETs
• Thermally Enhanced 56-Pin TSSOP Pad Down
DCA Package
APPLICATIONS
• 3-Phase Brushless DC Motor and Permanent
Magnet Synchronous Motor
• CPAP and Pump
• E-bike, Hospital Bed, Wheel Chair
• Power Drill, Blender, Chopper
DESCRIPTION
The DRV8302 is a gate driver IC for three phase
motor drive applications. It provides three half bridge
drivers, each capable of driving two N-type
MOSFETs, one for the high-side and one for the low
side. It supports up to 2.3A sink and 1.7A source
peak current capability and only needs a single power
supply with a wide range from 8 to 60V. The
DRV8302 uses bootstrap gate drivers with trickle
charge circuitry to support 100% duty cycle. The gate
driver uses automatic hand shaking when high side
FET or low side FET is switching to prevent current
shoot through. Vds of FETs is sensed to protect
external power stage during overcurrent conditions.
The DRV8302 includes two current shunt amplifiers
for accurate current measurement. The current
amplifiers support bi-directional current sensing and
provide an adjustable output offset of up to 3V.
The DRV8302 also has an integrated switching mode
buck converter with adjustable output and switching
frequency to support MCU or additional system power
needs. The buck is capable to drive up to 1.5A load.
PVDD
Vs
PWM
3 or 6
Motor
Controller
Control
Error
Reporting
ADC1
Vref
ADC2
DRV8302
Buck
Converter
Control
and
Protection
Logic
Three-Phase
NMOS Gate
Driver
offset
+
_
offset
+
_
GH_ A
GL_A
GH_ B
GL_B
GH_C
GL_C
MOTOR
Figure 1. DRV8302 Simplified Application Schematic
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
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 © 2011, Texas Instruments Incorporated