DRV8256PRGERG4中文资料德州仪器数据手册PDF规格书

1 Features

• N-channel H-bridge motor driver

– Drives one bidirectional brushed-DC motor

– Two unidirectional brushed DC motors

• Integrated current sensing and regulation

• 4.5 V to 48 V Operating supply voltage range

• Multiple control interface options

– PHASE/ENABLE (PH/EN)

– PWM (IN/IN)

• Smart tune, fast and mixed decay options

• Low RDS(ON): 165 mΩ HS + LS at 24 V, 25°C

• High Output Current Capability: 6.4-A peak

• Limits inrush current of brushed-DC motors

• Configurable Off-Time PWM Chopping

– 7, 16, 24 or 32 μs

• Supports 1.8 V, 3.3 V, 5.0 V logic inputs

• Low-current sleep mode (2 μA)

• Spread spectrum clocking for low EMI

• Protection features

– VM undervoltage lockout (UVLO)

– Charge pump undervoltage (CPUV)

– Overcurrent protection (OCP)

– Thermal shutdown (OTSD)

– Fault condition output (nFAULT)

2 Applications

• Brushed DC Motors

• Printers and scanners

• ATMs and Textile Machines

• Major home appliances

• Vacuum, humanoid, and robotics

• Smart Meters

3 Description

The DRV8256E/P devices are single H-bridge motor

drivers for a wide variety of industrial applications.

The devices integrate an N-channel H-bridge, charge

pump regulator, current sensing and regulation, and

protection circuitry.

Integrated current sensing allows the driver to

regulate the motor inrush current during start up

and high load events. A current limit can be set

with an adjustable external voltage reference. The

integrated current sensing uses an internal current

mirror architecture, removing the need for a large

power shunt resistor, saving board area and reducing

system cost. A low-power sleep mode is provided to

achieve ultra-low quiescent current draw by shutting

down most of the internal circuitry.

Internal protection features are provided for

supply undervoltage lockout (UVLO), charge pump

undervoltage (CPUV), output overcurrent (OCP), and

device overtemperature (TSD). Fault conditions are

indicated on nFAULT.