DRV8873中文资料40-V, 10-A H-bridge motor driver with integrated current sensing & current sense feedback数据手册TI规格书

描述 Description

The DRV8873 device is an integrated driver IC for driving a brushed DC motor in industrial applications. Two logic inputs control the H-bridge driver, which consists of four N-channel MOSFETs that drive motors bi-directionally with up to 10-A peak current. The device operates from a single power supply and supports a wide input supply range from 4.5 V to 38 V.

A PH/EN or PWM interface allows simple interfacing to controller circuits. Alternatively, independent half-bridge control is available to drive two solenoid loads.

A current mirror allows the controller to monitor the load current. This mirror approximates the current through the high-side FETs, and does not require a high-power resistor for sensing the current.

A low-power sleep mode is provided to achieve very-low quiescent current draw by shutting down much of the internal circuitry. Internal protection functions are provided for undervoltage lockout, charge pump faults, overcurrent protection, short-circuit protection, open-load detection, and overtemperature. Fault conditions are indicated on an nFAULT pin and through the SPI registers.

特性 Features

• H-Bridge Motor Driver
• 4.5-V to 38-V Operating Voltage Range
• Low HS + LS RDS(ON)
• 250 mΩ at TJ = 150°C, 13.5 V
• Current Mirror for Output Current Sensing
• PH/EN
• Independent Half-Bridge Control
• Supports 1.8-V, 3.3-V, 5-V Logic Inputs
• Low-Power Sleep Mode (10 µA)
• 24 HTSSOP PowerPAD™ IC Package
• Protection Features
• Charge Pump Undervoltage (CPUV)
• Output short to battery and short to ground protection
• Thermal Shutdown (TSD)
• Fault Condition Output (nFAULT / SPI)