ZHCSFT7 December   2016 DRV401-Q1

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 修订历史记录
  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. 11器件和文档支持
    1. 11.1 器件支持
      1. 11.1.1 开发支持
        1. 11.1.1.1 TINA-TI（免费软件下载）
        2. 11.1.1.2 TI 高精度设计
        3. 11.1.1.3 WEBENCH® Filter Designer
    2. 11.2 文档支持
      1. 11.2.1 相关文档
    3. 11.3 接收文档更新通知
    4. 11.4 社区资源
    5. 11.5 商标
    6. 11.6 静电放电警告
    7. 11.7 Glossary
  12. 12机械、封装和可订购信息
    1. 12.1 散热焊盘

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

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