ZHCSA67F June   2012  – April 2021 DRV8837 , DRV8838

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用范围
  3. 3 说明
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
    2. 5.1 Dapper 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 Bridge Control
      2. 7.3.2 Independent Half-Bridge Control
      3. 7.3.3 Sleep Mode
      4. 7.3.4 Power Supplies and Input Pins
      5. 7.3.5 Protection Circuits
        1. 7.3.5.1 VCC Undervoltage Lockout
        2. 7.3.5.2 Overcurrent Protection (OCP)
        3. 7.3.5.3 Thermal Shutdown (TSD)
        4. 7.3.5.4 28
    4. 7.4 Device Functional Modes
      1.      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 Low-Power Operation
          3. 8.2.3 Application Curves
  8. 8 Power Supply Recommendations
    1. 8.1 Bulk Capacitance
  9. 9 Layout
    1. 9.1 Layout Guidelines
    2. 9.2 Layout Example
    3. 9.3 Power Dissipation
  10. 10Device and Documentation Support
    1. 10.1 Documentation Support
      1. 10.1.1 Related Documentation
    2. 10.2 Related Links
    3. 10.3 Receiving Notification of Documentation Updates
    4. 10.4 Community Resources
    5. 10.5 Trademarks
      1.      Mechanical, Packaging, and Orderable Information

7.3.1 Bridge Control

The DRV8837 device is controlled using a PWM input interface, also called an IN-IN interface. Each output is controlled by a corresponding input pin.

Table 7-1 shows the logic for the DRV8837 device.

Table 7-1 DRV8837 Device Logic
nSLEEPIN1IN2OUT1OUT2FUNCTION (DC MOTOR)
0XXZZCoast
100ZZCoast
101LHReverse
110HLForward
111LLBrake

The DRV8838 device is controlled using a PHASE/ENABLE interface. This interface uses one pin to control the H-bridge current direction, and one pin to enable or disable the H-bridge.

Table 7-2 shows the logic for the DRV8838.

Table 7-2 DRV8838 Device Logic
nSLEEPPHENOUT1OUT2FUNCTION (DC MOTOR)
0XXZZCoast
1X0LLBrake
111LHReverse
101HLForward
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