DRV8704 Texas instruments

DRV8704

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DRV8704

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Описание

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).

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)
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

Number of full bridges	2
Vs (min) (V)	8
Vs ABS (max) (V)	60
Sleep current (µA)	65
Control mode	PWM
Control interface	Hardware (GPIO), SPI
Features	Current Regulation
Rating	Catalog
Operating temperature range (°C)	-40 to 85