SNOSD98A May   2020  – December 2020 LM7481-Q1

PRODUCTION DATA  

  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Pin Configuration and Functions
  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 Switching Characteristics
    7. 6.7 Typical Characteristics
  7. Parameter Measurement Information
  8. Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Charge Pump
      2. 8.3.2 Dual Gate Control (DGATE, HGATE)
        1. 8.3.2.1 Reverse Battery Protection (A, C, DGATE)
        2. 8.3.2.2 Load Disconnect Switch Control (HGATE, OUT)
      3. 8.3.3 Over Voltage Protection and Battery Voltage sensing (VSNS, SW, OV)
      4. 8.3.4 Low Iq Shutdown and Under Voltage Lockout (EN/UVLO)
    4. 8.4 Device Functional Modes
    5. 8.5 Application Examples
      1. 8.5.1 Redundant Supply OR-ing with Inrush Current Limiting, Over Voltage Protection and ON/OFF Control
  9. Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical 12-V Reverse Battery Protection Application
      1. 9.2.1  Design Requirements for 12-V Battery Protection
      2. 9.2.2  Automotive Reverse Battery Protection
      3. 9.2.3  Input Transient Protection: ISO 7637-2 Pulse 1
      4. 9.2.4  AC Super Imposed Input Rectification: ISO 16750-2 and LV124 E-06
      5. 9.2.5  Input Micro-Short Protection: LV124 E-10
      6. 9.2.6  Detailed Design Procedure
        1. 9.2.6.1 Design Considerations
        2. 9.2.6.2 Charge Pump Capacitance VCAP
        3. 9.2.6.3 Input and Output Capacitance
        4. 9.2.6.4 Hold-up Capacitance
        5. 9.2.6.5 Over Voltage Protection and Battery Monitor
      7. 9.2.7  MOSFET Selection: Blocking MOSFET Q1
      8. 9.2.8  MOSFET Selection: Hot-Swap MOSFET Q2
      9. 9.2.9  TVS selection
      10. 9.2.10 Application Curves
    3. 9.3 Do's and Don'ts
  10. 10Power Supply Recommendations
    1. 10.1 Transient Protection
    2. 10.2 TVS Selection for 12-V Battery Systems
    3. 10.3 TVS Selection for 24-V Battery Systems
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Receiving Notification of Documentation Updates
    2. 12.2 Support Resources
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Typical Characteristics

GUID-20201202-CA0I-9XX7-VDMF-S50CZQPBZK4Z-low.gifFigure 6-1 Operating Quiescent Current vs Supply Voltage
GUID-20201202-CA0I-PG6T-PB0V-7P9SDXVPXTRF-low.gifFigure 6-3 Shutdown Supply Current vs Supply Voltage.
GUID-20201127-CA0I-9FLD-M3FK-HCS9KDBNCRT9-low.gifFigure 6-5 Charge Pump V-I Characteristics at VS > = 12 V
GUID-20201004-CA0I-MPVN-23RZ-FHWJ9D5L4SVF-low.gifFigure 6-7 HGATE Drive Voltage vs Supply Voltage
GUID-20200930-CA0I-B95B-VMT5-J88V81Z2QKGK-low.gifFigure 6-9 UVLO Thresholds vs Temperature
GUID-20200930-CA0I-0VLJ-VWJK-51HJRDZGN35D-low.gifFigure 6-11 Charge Pump UVLO Threshold vs Temperature
GUID-20200930-CA0I-F2GS-BWTW-9RJNW92LQVBL-low.gifFigure 6-13 VS POR Threshold vs Temperature
GUID-20200930-CA0I-VNTQ-1FTD-CGHPZDT3SFZ5-low.gifFigure 6-15 HGATE Current (IHGATE) vs Supply Voltage.
GUID-20201202-CA0I-FJ3G-MKR6-0ZZLFKHRNJHS-low.gifFigure 6-2 Operating Quiescent Current vs Supply Voltage (> 10 V).
GUID-20201127-CA0I-F7BQ-13J7-8H6TNHFBZSDF-low.gifFigure 6-4 Charge Pump Current vs Supply Voltage at CAP = 6 V
GUID-20201004-CA0I-M2WK-HKTC-JJV9GBWJPSKV-low.gifFigure 6-6 DGATE Drive Voltage vs Supply Voltage
GUID-20201004-CA0I-JVR5-XNSD-GVGGTJLMHD5N-low.gifFigure 6-8 ANODE Leakage Current vs Reverse ANODE Voltage
GUID-20200930-CA0I-LCD7-WBTS-V1DMMSBFHJ1F-low.gifFigure 6-10 OVP Thresholds vs Temperature
GUID-20200930-CA0I-JP4T-VWBZ-XHBHFQ9B9636-low.gifFigure 6-12 VA POR Threshold vs Temperature
GUID-20201007-CA0I-0LCG-FWCR-1N07PT04TMTW-low.gifFigure 6-14 HGATE Turn OFF Delay during OV