DRV8847SPWR

1 Features

· Dual H-bridge motor driver

  -Single or dual brushed DC motors

  -One bipolar stepper motor

  -Solenoid loads

· 2.7-V to 18-V operating voltage range

· High output current per H-bridge

  -1-A RMS driver current at TA=25℃

  -2-A RMS driver current in parallel mode at TA=25℃

· Low on-state resistance at VM>5-V

  -1000mQRos/oN)(HS+LS) at TA=25℃

· Multiple control interface options

  -4-Pin interface

  -2-Pin interface

  -Parallel bridge interface

  -Independent bridge interface

· Current regulation with 20-us fixed off time

· Torque scalar for scaling output current to 50%

· Supports 1.8-V,3.3-V,5-V logic inputs

· Low-power sleep mode

  -1.7-uA Sleep mode supply current at Vw=12-V, TA=25℃

· I2C Device Variant Available(DRV8847S)

  -Detailed diagnostics on I2C registers

  -Multi-slave operation support

  -Supports standard and fast IPC mode

· Small packages and footprints

  -16 Pin TSSOP(no thermal pad)

  -16 Pin HTSSOP PowerPAD M package

  -16 Pin WQFN thermal package

· Built-in protection features

  -VM undervoltage lockout

  -Overcurrent protection

  -Open load detection

  -Thermal shutdown

  -Fault condition indication pin(nFAULT)

2 Applications

· Refrigerator damper and ice maker

· Washers,dryers and dishwashers

· Electronic point-of-sale(ePOS)printers

· Stage lighting equipment

· Miniature circuit breakers and smart meters

3 Description 

The DRV8847 device is a dual H-bridge motor driver for industrial applications, home appliances, ePOSprinters, and other mechatronic applications. This device can be used for driving two DC motors,a bipolar stepper motor, or other loads such as relays. A simple PWM interface allows easy interface with the controller. The DRV8847 device operates off a single power supply and supports a wide input supply range from 2.7 to 18V.

The output stage of the driver consists of N-channel power MOSFETs configured as two full H-bridges to drive motor windings or four independent half bridges (in independent bridge interface).A fixed off time controls the peak current in the bridge which can drive a 1-A load (2-A in parallel mode with proper heat sinking, at 25C TA).

A low-power sleep mode is provided to achieve a lowquiescent current draw by shutting down much of the internal circuitry. Additionally,a torque scalar is provided which dynamically scales the output current through a digital input pin. This feature lets the controller decrease the current required for lower power consumption.

Internal protection functions are provided for undervoltage-lockout, overcurrent protection on each FET, short circuit protection, open-load detection, andovertemperature. Fault conditions are indicated by on the nFAULT pin. The IC device variant (DRV8847S) has detailed diagnostics.

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