SLVS787A May   2009  – June 2015 TMP816

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Typical Characteristics
  6. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Speed Control
      2. 6.3.2 Soft-Start
      3. 6.3.3 Lock Detection
      4. 6.3.4 Current Limit
      5. 6.3.5 Speed Output
      6. 6.3.6 Drive Frequency Selection
    4. 6.4 Device Functional Modes
  7. 7 Applications and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
      3. 7.2.3 Application Curves
  8. 8 Power Supply Recommendations
  9. 9 Layout
    1. 9.1 Layout Guidelines
    2. 9.2 Layout Example
  10. 10Device and Documentation Support
    1. 10.1 Community Resources
    2. 10.2 Trademarks
    3. 10.3 Electrostatic Discharge Caution
    4. 10.4 Glossary
  11. 11Mechanical, Packaging, and Orderable Information

Package Options

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

7 Applications 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.

7.1 Application Information

The TMP816 device needs few external components for the features described in Feature Description. The device needs a 1-µF 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.

7.2 Typical Application

TMP816 ai_12v_app_lvs787.gifFigure 5. 12-V Sample Application Circuit

7.2.1 Design Requirements

For this design example, use the following parameters:

  • Input Voltage: 6 to 16 V
  • VCC capacitor: 1 µF or more
  • H Bridge Top side: P-channel FETs or PNP transistors
  • Bottom side: N-channel FETs

7.2.2 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 (0.47 µF or calculated values) or to GND.
  • Drive outputs connected to the Gates of the H bridge switches.
  • Pullup on FG.

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.

7.2.3 Application Curves

TMP816 app_curve_01_strt_12_v_slvs787.pngFigure 6. Start-up at 12 V
TMP816 app_curve_03_lock_d_wvfrm_slvs787.pngFigure 8. Lock Detection Waveform
TMP816 app_curve_02_mo_a_pc_100_dc_slvs787.pngFigure 7. Motor Outputs and Phase Current at 100% Duty Cycle