SLVSCC0D November   2013  – October 2019 DRV8850

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Simplified Schematic
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Timing Requirements
    7. 6.7 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Power Supervisor
      2. 7.3.2 Bridge Control
      3. 7.3.3 Current Sensing – VPROPI
      4. 7.3.4 Slew-Rate Control
      5. 7.3.5 Dead Time
      6. 7.3.6 Propagation Delay
      7. 7.3.7 Power Supplies and Input Pins
      8. 7.3.8 LDO Voltage Regulator
      9. 7.3.9 Protection Circuits
        1. 7.3.9.1 Overcurrent Protection (OCP)
        2. 7.3.9.2 Thermal Shutdown (TSD)
        3. 7.3.9.3 Undervoltage Lockout (UVLO)
        4. 7.3.9.4 Overvoltage Lockout (OVLO)
    4. 7.4 Device Functional Modes
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Motor Voltage
        2. 8.2.2.2 Drive Current
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
    1. 9.1 Bulk Capacitance
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
    3. 10.3 Thermal Considerations
      1. 10.3.1 Power Dissipation
  11. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Community Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

7.1 Overview

The DRV8850 is an integrated motor driver solution for one DC motor. The device integrates one NMOS H-bridge, current regulation circuitry, and various protection circuitry. The DR8850 can be powered with a supply voltage range from 2 V to 5.5 V, and is capable of providing an output current up to 5-A peak current. Actual operable peak current will depend on the temperature, supply voltage, and PCB ground plane size. Between
VM = 1.95 V and VM = 2 V the H-bridge outputs are shut down.

A simple 4 pin interface allows for individual control of each internal H-bridge FET. The condition where both HS and LS FETs are turned on at the same time is not allowed. During this input condition both the HS and LS FETs turn off.

The current monitoring is configurable from a range of 500 mA to 5 A. The VPROPI pin outputs an analog current that is proportional to the current flowing through the H-bridge. VPROPI is derived from the current through either of the high side FETs. Because of this, VPROPI does not represent H-bridge current when operating in a fast-decay mode or low-side slow-decay mode.

The LDO regulator integrated in the DRV8850 is typically used to provide the supply voltage for a low-power microcontroller. The output voltage is adjustable from 1.6 V to VCC – VLDO using external resistors. LDOEN pin is used to enable or disable the LDO regulator; when disabled the output is turned off and the LDO regulator enters a very-low-power state.