SLASEJ5B October   2017  – January 2020

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Typical Application Schematic
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1.     Pin 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 Timing Requirements
    7. 6.7 Switching Characteristics
    8. 6.8 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 Device Enable (EN)
      2. 7.3.2 Gated Output (Gx)
      3. 7.3.3 Register Clear (CLR)
      4. 7.3.4 Open-Drain Outputs and Flexible Diagnostics Channel
        1. 7.3.4.1 Configurable Outputs
        2. 7.3.4.2 LED-Open Diagnostics
        3. 7.3.4.3 LED-Short Diagnostics
      5. 7.3.5 Thermal Shutdown
      6. 7.3.6 Command Error
      7. 7.3.7 Serial Communication Error
      8. 7.3.8 Error Feedback
      9. 7.3.9 Interface
        1. 7.3.9.1 Register Write
        2. 7.3.9.2 Register Read
        3. 7.3.9.3 Shift-Register Communication-Fault Detection
        4. 7.3.9.4 Clear Register
        5. 7.3.9.5 Register Clock
    4. 7.4 Device Functional Modes
      1. 7.4.1 Normal Operation
      2. 7.4.2 POR Reset
      3. 7.4.3 Standby Mode
    5. 7.5 Register Maps
    6. 7.6 Interface Registers
      1. 7.6.1 Configuration Register (Offset = 0h) [reset = 0h]
        1. Table 5. Configuration Register Field Descriptions
      2. 7.6.2 Fault Readback Register (Offset = 1h) [reset = 0h]
        1. Table 6. Fault Readback Register Field Descriptions
  8. 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
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Receiving Notification of Documentation Updates
    2. 11.2 Community Resources
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

7.3.4.2 LED-Open Diagnostics

As depicted in Configurable Outputs, the DIAG0 channel monitors the anode voltage of the LED load of DRAIN0. When the DRAIN0 channel turns on, DIAG0 compares the DRAIN0 voltage with internal threshold for LED-open detection, V(OC_th). When DRAIN0 is on, and V(DIAG0) is continuously higher than V(OC_th) for tpd(deg_open), the device asserts an LED-open fault, sets the corresponding bit in the fault table, and pulls ERR low.

An LED-open fault does not turn off the channel automatically in the LED-open state. Once the device detects an open fault, it latches the fault status in the DIAGn_OPEN fault register. The fault register value only recovers to normal when the LED fault disappears and the fault status is read back. Cycling Gx on and off does not clear the fault.