ZHCSRX1E may   2010  – march 2023 DRV8840

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 Revision History
  5. 5 Pin Configuration and 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 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 PWM Motor Driver
      2. 7.3.2 Bridge Control
      3. 7.3.3 Current Regulation
      4. 7.3.4 Decay Mode and Braking
      5. 7.3.5 Blanking Time
      6. 7.3.6 Protection Circuits
        1. 7.3.6.1 Overcurrent Protection (OCP)
        2. 7.3.6.2 Thermal Shutdown (TSD)
        3. 7.3.6.3 Undervoltage Lockout (UVLO)
    4. 7.4 Device Functional Modes
      1. 7.4.1 nRESET and nSLEEP Operation
  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 Current Regulation
        2. 8.2.2.2 Sense Resistor
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
    1. 9.1 Bulk Capacitance Sizing
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
    3. 10.3 Thermal Considerations
      1. 10.3.1 Power Dissipation
      2. 10.3.2 Heatsinking
  11. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Community Resources
    3. 11.3 Trademarks
  12. 12Mechanical, Packaging, and Orderable Information

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7.1 Overview

The DRV8840 is an integrated motor driver solution for printers, scanners, and other automated equipment applications. The device integrates a single NMOS H-bridge, charge pump, current sense, current regulation, and device protection circuitry. The DRV8828 can be powered from a single voltage supply from 8.2 V to 45 V, and is capable of providing a continuous output current up to 5 A.

A simple PHASE/ENBL interface allows for easy interfacing to an external controller. A 5 bit current control scheme allows for up to 32 discrete current levels. The current regulation method is adjustable between slow and fast decay.

Integrated protection circuits allows the device to monitor and protect against overcurrent, undervoltage, and overtemperature faults which are all reported through a fault indication pin (nFAULT). A low power sleep mode is integrated which allows the system to lower power consumption when not driving the motor.