SBOS814 December   2016 DRV401-Q1

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  Magnetic Probe (Sensor) Interface
      2. 7.3.2  PWM Processing
      3. 7.3.3  Compensation Driver
      4. 7.3.4  External Compensation Coil Driver
      5. 7.3.5  Shunt Sense Amplifier
      6. 7.3.6  Over-Range Comparator
      7. 7.3.7  Voltage Reference
      8. 7.3.8  Demagnetization
      9. 7.3.9  Power-On and Brownout
      10. 7.3.10 Error Conditions
      11. 7.3.11 Protection Recommendations
    4. 7.4 Device Functional Modes
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Functional Principle of Closed-Loop Current Sensors with Magnetic Probe Using the DRV401-Q1 Device
      2. 8.1.2 Basic Connection
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  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 Device Support
      1. 11.1.1 Development Support
        1. 11.1.1.1 TINA-TI (Free Software Download)
        2. 11.1.1.2 TI Precision Designs
        3. 11.1.1.3 WEBENCH® Filter Designer
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
    3. 11.3 Receiving Notification of Documentation Updates
    4. 11.4 Community Resources
    5. 11.5 Trademarks
    6. 11.6 Electrostatic Discharge Caution
    7. 11.7 Glossary
  12. 12Mechanical, Packaging, and Orderable Information
    1. 12.1 Thermal Pad

Package Options

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

9 Power Supply Recommendations

The DRV401-Q operates from a single power supply, nominally 5 V, and must remain between 4.5 V and 5.5 V for normal operation. See Figure 46, Figure 47, Figure 48, and Figure 49 for device power-on behavior.

DRV401-Q1 ai_tc_demag_cycle01_bos814.gif
With power-up, the VOUT across the compensation coil centers around half the supply and then starts the cycle after the 4-V threshold is exceeded. The ERROR flag resets to H after the cycle is completed.
Figure 46. Demagnetization and Power-On Timing: Demagnetization Cycle on Power-Up
DRV401-Q1 ai_tc_demag_cycle02_bos814.gif
The probe oscillation V(IS1) starts just before ERROR resets—15 μs after the supply voltage crosses the 4-V threshold.
Figure 47. Demagnetization and Power-On Timing: Power-Up Without Demagnetization
DRV401-Q1 ai_tc_demag_cycle03_bos814.gif Figure 48. Demagnetization and Power-On Timing: Demagnetization Cycle On Command
DRV401-Q1 ai_tc_demag_cycle04_bos814.gif
The ERROR flag resets to H (as shown) and the output settles back to normal operation.
Figure 49. Demagnetization and Power-On Timing: Abort of Demagnetization Cycle