DRV8704 Datasheet, PDF (1/38 Pages) Texas Instruments – Dual H-Bridge PWM Gate Driver

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DRV8704 52-V Dual H-Bridge PWM Gate Driver
DRV8704
SLVSD29 – OCTOBER 2015
1 Features
•1 Pulse Width Modulation (PWM) Motor Driver
– Drives External N-Channel MOSFETs
– PWM Control Interface for Dual DC Motors
– Supports 100% PWM Duty Cycle
• 8-V to 52-V Operating Supply Voltage Range
• Adjustable Gate Drive (4 Levels)
– 50-mA to 200-mA Source Current
– 100-mA to 400-mA Sink Current
• Integrated PWM Current Regulation
• Flexible Decay Modes
– Automatic Mixed Decay Mode
– Slow Decay
– Fast Decay
– Mixed Decay (Adjustable Percent Fast)
• Highly Configurable SPI
• Torque DAC to Digitally Scale Current
• Low-Current Sleep Mode (65 μA)
• 5-V, 10-mA LDO Regulator
• Thermally-Enhanced Surface-Mount Package
– 38-Pin HTSSOP (PowerPAD)
SPACER
• Protection Features
– VM Undervoltage Lockout (UVLO)
– Gate Driver Fault (PDF)
– Overcurrent Protection (OCP)
– Thermal Shutdown (TSD)
– Fault Condition Indication Pin (nFAULT)
– Fault Diagnostics through SPI
2 Applications
• Automatic Teller and Money Handling Machines
• Office Automation Machines
• Factory Automation and Robotics
• Textile Machines
3 Description
The DRV8704 is a dual-brushed motor controller for
industrial equipment applications. The device controls
external N-channel MOSFETs configured as two H-
bridges.
Motor current can be accurately controlled using
adaptive blanking time and various current decay
modes, including an automatic mixed decay mode.
A simple PWM interface allows easy interfacing to
controller circuits. A SPI serial interface is used to
program the device operation. Output current
(torque), gate drive settings, and decay mode are all
programmable through a SPI serial interface.
Internal shutdown functions are provided for
overcurrent protection, short-circuit protection, gate
driver faults, undervoltage lockout (UVLO), and
overtemperature. Fault conditions are indicated by a
FAULTn pin, and each fault condition is reported by a
dedicated bit through SPI.
The DRV8704 is packaged in a PowerPAD™ 38-pin
HTSSOP package with thermal pad (Eco-friendly:
RoHS & no Sb/Br).
Device Information ⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
DRV8704
HTSSOP (38)
9.70 mm × 4.40 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic
8.0 to 52 V
PWM DRV8704 _{Gate Drive}
B^BD^DCC
SLEEPn
Dual
H-Bridge
SPI _{Gate Driver}
Sense
B^BD^DCC
nFAULT
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.