SLVSH58 August   2024 DRV81004-Q1

ADVANCE INFORMATION  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 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
      1. 5.5.1 SPI Timing Requirements
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Control Pins
        1. 6.3.1.1 Input Pins
        2. 6.3.1.2 nSLEEP Pin
      2. 6.3.2 Power Supply
        1. 6.3.2.1 Modes of Operation
          1. 6.3.2.1.1 Power-up
          2. 6.3.2.1.2 Sleep mode
          3. 6.3.2.1.3 Idle mode
          4. 6.3.2.1.4 Active mode
          5. 6.3.2.1.5 Limp Home mode
          6. 6.3.2.1.6 Reset condition
      3. 6.3.3 Power Stage
        1. 6.3.3.1 Switching Resistive Loads
        2. 6.3.3.2 Inductive Output Clamp
        3. 6.3.3.3 Maximum Load Inductance
        4. 6.3.3.4 Switching Channels in parallel
      4. 6.3.4 Protection and Diagnostics
        1. 6.3.4.1 Undervoltage on VM
        2. 6.3.4.2 Overcurrent Protection
        3. 6.3.4.3 Over Temperature Protection
        4. 6.3.4.4 Over Temperature Warning
        5. 6.3.4.5 Over Temperature and Overcurrent Protection in Limp Home mode
        6. 6.3.4.6 Reverse Polarity Protection
        7. 6.3.4.7 Over Voltage Protection
        8. 6.3.4.8 Output Status Monitor
      5. 6.3.5 SPI Communication
        1. 6.3.5.1 SPI Signal Description
          1. 6.3.5.1.1 Chip Select (nSCS)
            1. 6.3.5.1.1.1 Logic high to logic low Transition
            2. 6.3.5.1.1.2 Logic low to logic high Transition
          2. 6.3.5.1.2 Serial Clock (SCLK)
          3. 6.3.5.1.3 Serial Input (SDI)
          4. 6.3.5.1.4 Serial Output (SDO)
        2. 6.3.5.2 Daisy Chain Capability
        3. 6.3.5.3 SPI Protocol
        4. 6.3.5.4 SPI Registers
          1. 6.3.5.4.1  Standard Diagnosis Register
          2. 6.3.5.4.2  Output control register
          3. 6.3.5.4.3  Input 0 Mapping Register
          4. 6.3.5.4.4  Input 1 Mapping Register
          5. 6.3.5.4.5  Input Status Monitor Register
          6. 6.3.5.4.6  Open Load Current Control Register
          7. 6.3.5.4.7  Output Status Monitor Register
          8. 6.3.5.4.8  Configuration Register
          9. 6.3.5.4.9  Output Clear Latch Register
          10. 6.3.5.4.10 Configuration Register 2
  8. 7 Application and Implementation
    1. 7.1 Application Information
      1. 7.1.1 Typical Application
      2. 7.1.2 Suggested External Components
    2. 7.2 Layout
      1. 7.2.1 Layout Guidelines
      2. 7.2.2 Package Footprint Compatibility
  9. 8 Device and Documentation Support
    1. 8.1 Receiving Notification of Documentation Updates
    2. 8.2 Support Resources
    3. 8.3 Trademarks
    4. 8.4 Electrostatic Discharge Caution
    5. 8.5 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

Package Options

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

6.3.4.2 Overcurrent Protection

The DRV81004-Q1 is protected in case of overcurrent or short circuit of the load. There are two overcurrent thresholds (see Figure 6-10):

  • IL_OCP0 between channel switch ON and tOCPIN

  • IL_OCP1 after tOCPIN

The values of IL_OCP0 and IL_OCP1 depend on the OCP bit. Every time the channel is switched OFF for a time longer than 2 * tSYNC the over load current threshold is setback to IL_OCP0.

DRV81004-Q1 Overcurrent ThresholdFigure 6-10 Overcurrent Threshold

In case the load current is higher than IL_OCP0 or IL_OCP1, after time tOFF_OCP the over loaded channel is switched OFF and the diagnosis bit ERRx is set. The channel can be switched ON after clearing the protection latch by setting the corresponding CLRx bit to 1b. This bit is set back to 0b internally after de-latching the channel. Please refer to Figure 6-11 for details.

DRV81004-Q1 Latch OFF at OvercurrentFigure 6-11 Latch OFF at Overcurrent