SLVSD61A July   2016  – July 2016 DRV8837C

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  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 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 Sleep Mode
      3. 7.3.3 Power Supplies and Input Pins
      4. 7.3.4 Protection Circuits
    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 Low-Power Operation
      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 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

8 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality.

8.1 Application Information

The DRV8837C device is device is used to drive one DC motor or other devices like solenoids. The following design procedure can be used to configure the DRV8837C device.

8.2 Typical Application

DRV8837C typ_app_SLVSD61.gif Figure 7. Schematic of DRV8837C Application

8.2.1 Design Requirements

Table 4 lists the required parameters for a typical usage case.

Table 4. System Design Requirements

DESIGN PARAMETER REFERENCE EXAMPLE VALUE
Motor supply voltage VM 9 V
Logic supply voltage VCC 3.3 V
Target RMS current IOUT 0.8 A

8.2.2 Detailed Design Procedure

8.2.2.1 Motor Voltage

The appropriate motor voltage depends on the ratings of the motor selected and the desired RPM. A higher voltage spins a brushed dc motor faster with the same PWM duty cycle applied to the power FETs. A higher voltage also increases the rate of current change through the inductive motor windings.

8.2.2.2 Low-Power Operation

When entering sleep mode, TI recommends setting all inputs as a logic low to minimize system power.

8.2.3 Application Curves

DRV8837C gr_rev_dir_SLVSCG6.gif
Figure 8. 50% Duty Cycle, Forward Direction
DRV8837C gr_rev_dir_low_SLVSCG6.gif
Figure 10. 20% Duty Cycle, Forward Direction
DRV8837C gr_sleep_mode_SLVSCG6.gif
Figure 9. 50% Duty Cycle, Reverse Direction
DRV8837C gr_sleep_mode_2_SLVSCG6.gif
Figure 11. 20% Duty Cycle, Reverse Direction