SLDS151A May   2009  – June 2015 TMP814

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 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 Speed Control
      2. 7.3.2 Constant Voltage Bias
      3. 7.3.3 Soft-Start
      4. 7.3.4 Lock Detection
      5. 7.3.5 Current Limit
      6. 7.3.6 Minimum Speed Setting
      7. 7.3.7 Speed Output
      8. 7.3.8 Drive Frequency Selection
    4. 7.4 Device Functional Modes
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 12-V Sample Application Circuit
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 Application Curves
      2. 8.2.2 24-V/48-V Sample Application Circuit
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Community Resources
    2. 11.2 Trademarks
    3. 11.3 Electrostatic Discharge Caution
    4. 11.4 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

封装选项

机械数据 (封装 | 引脚)
散热焊盘机械数据 (封装 | 引脚)
订购信息

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 TMP814 device requires few external components for the features described in Feature Description. The device needs a 1-uF or more capacitor connected at VCC. The device generates 6-V regulated output which can be used for pullups in the circuit as well as the Hall sensor.

8.2 Typical Applications

8.2.1 12-V Sample Application Circuit

TMP814 ai_12v_app_cx_lds151.gifFigure 3. 12-V Sample Application Circuit

8.2.1.1 Design Requirements

Input Voltage: 6 to 16 V

VCC capacitor: 1 uF or more

H Bridge top side: P-channel FETs

H Bridge bottom side: N-channel FETs

8.2.1.2 Detailed Design Procedure

Pins:

  • CPWM Capacitor: 100 pF for 25 kHz switching or appropriate.
  • VTH Pin connected to Ground for Full speed or supplied with pulsed input.
  • RMI Pin Pulled high to 6VREG output or external connection if required.
  • ROFF pulled to 6VREG.
  • 6VREG connected to Hall Sensor. Hall sensor differential inputs connected to IN+ and IN-.
  • SENSE pin or GND.
  • CT connected to Lock Detection capacitor (0.47uF or calculated values)or to GND.
  • Drive outputs connected to the Gates of the H bridge switches.
  • Pullup on FG.
  • VLIM and VOVER kept open.

Power Supply:

  • Make sure the power supply has set with sufficient current limit at the decided at the motor voltage.

Build the circuit with previously recommended connections at the pins.

Test the motor circuit with hardware connected to it.

8.2.1.3 Application Curves

TMP814 app_curv_01_slds151.pngFigure 4. Start-up at 12 V
TMP814 app_curv_03_slds151.pngFigure 6. Lock Detection Waveform
TMP814 app_curv_02_slds151.pngFigure 5. Motor Outputs and Phase Current at 100% Duty Cycle

8.2.2 24-V/48-V Sample Application Circuit

The device can be used for Vm >Vcc (that is, 24/48 V). The VOVER pin and associated circuit help keep VCC of the device below the VCC limits of the device, allowing Vm to go at 24/48V.

TMP814 ai_24v_48v_app_cx_lds151.gifFigure 7. 24-V/48-V Sample Application Circuit