JAJSVB5 September   2024 TIOL221

ADVANCE INFORMATION  

  1.   1
  2. 1 特長
  3. 2 アプリケーション
  4. 3 概要
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 ESD Ratings - IEC Specifications
    4. 5.4 Recommended Operating Conditions
    5. 5.5 Thermal Information
    6. 5.6 Electrical Characteristics
    7. 5.7 Switching Characteristics
  7. 6 Parameter Measurement Information
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagrams
    3. 7.3 Feature Description
      1. 7.3.1  Wake-Up Detection
      2. 7.3.2  Current Limit Configuration
        1. 7.3.2.1 Current Limit Configuration in Pin-Mode
        2. 7.3.2.2 Current Limit Configuration in SPI mode
      3. 7.3.3  CQ Current Fault Detection, Indication and Auto Recovery
      4. 7.3.4  DO Current Fault Detection, Indication and Auto Recovery
      5. 7.3.5  CQ and DI Receivers
      6. 7.3.6  Fault Reporting
        1. 7.3.6.1 Thermal Warning, Thermal Shutdown
      7. 7.3.7  The Integrated Voltage Regulator (LDO)
      8. 7.3.8  Reverse Polarity Protection
      9. 7.3.9  Integrated Surge Protection and Transient Waveform Tolerance
      10. 7.3.10 Undervoltage Lock-Out (UVLO)
      11. 7.3.11 Interrupt Function
    4. 7.4 Device Functional Modes
      1. 7.4.1 CQ and DO Tracking mode
    5. 7.5 SPI Programming
  9. 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 Driving Capacitive Loads
        2. 8.2.2.2 Driving Inductive Loads
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 TIOL221 Registers
  11. 10Device and Documentation Support
    1. 10.1 Receiving Notification of Documentation Updates
    2. 10.2 サポート・リソース
    3. 10.3 Trademarks
    4. 10.4 静電気放電に関する注意事項
    5. 10.5 用語集
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information
    1. 12.1 Tape and Reel Information
    2. 12.2 Mechanical Data

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発注情報

8.2.2.2 Driving Inductive Loads

The TIOL221 is capable of magnetizing and demagnetizing large inductive loads. These devices contain internal circuitry that enables fast and safe demagnetization when configured as either P-switch or N-switch mode.

In P-switch configuration, the load inductor L is magnetized when the driver (CQ or DO) output is driven high. When the PNP is turned off, there is a significant amount of negative inductive kick back at the driver output pin. This voltage is safely clamped internally at about −15V.

Similarly, in N-switch configuration, the load inductor L is magnetized when the driver output is driven low. When the NPN is turned off, there is a significant amount of positive inductive kick back at the driver output pin. This voltage is safely clamped internally at about 15V.

The equivalent protection circuits are shown in Figure 8-3 and Figure 8-4. The minimum value of the resistive load R can be calculated as:

Equation 2. TIOL221
TIOL221 P-Switch ModeFigure 8-3 P-Switch Mode
TIOL221 N-Switch ModeFigure 8-4 N-Switch Mode