SLVSHA1 September   2024 TPS1685

ADVANCE INFORMATION  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison Table
  6. 5 Pin Configuration and Functions
  7. 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 Logic Interface
    7. 6.7 Timing Requirements
    8. 6.8 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Undervoltage Protection
      2. 7.3.2  Insertion Delay
      3. 7.3.3  Overvoltage Protection
      4. 7.3.4  Inrush Current, Overcurrent, and Short-Circuit Protection
        1. 7.3.4.1 Slew rate (dVdt) and Inrush Current Control
          1. 7.3.4.1.1 Start-Up Time Out
        2. 7.3.4.2 Steady-State Overcurrent Protection (Circuit-Breaker)
        3. 7.3.4.3 Active Current Limiting During Start-Up
        4. 7.3.4.4 Short-Circuit Protection
      5. 7.3.5  Analog Load Current Monitor (IMON)
      6. 7.3.6  Mode Selection (MODE)
      7. 7.3.7  Parallel Device Synchronization (SWEN)
      8. 7.3.8  Stacking Multiple eFuses for Unlimited Scalability
        1. 7.3.8.1 Current Balancing During Start-Up
      9. 7.3.9  Analog Junction Temperature Monitor (TEMP)
      10. 7.3.10 Overtemperature Protection
      11. 7.3.11 Fault Response and Indication (FLT)
      12. 7.3.12 Power Good Indication (PG)
      13. 7.3.13 Output Discharge
      14. 7.3.14 FET Health Monitoring
      15. 7.3.15 Single Point Failure Mitigation
        1. 7.3.15.1 IMON Pin Single Point Failure
        2. 7.3.15.2 IREF Pin Single Point Failure
        3. 7.3.15.3 ITIMER Pin Single Point Failure
    4. 7.4 Device Functional Modes
  9. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Single Device, Standalone Operation
      2. 8.1.2 Multiple Devices, Parallel Connection
    2. 8.2 Typical Application: 54V Power Path Protection in Data Center Servers
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curves
    3. 8.3 Power Supply Recommendations
      1. 8.3.1 Transient Protection
      2. 8.3.2 Output Short-Circuit Measurements
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Documentation Support
      1. 9.1.1 Related Documentation
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information
    1. 11.1 Tape and Reel Information
    2. 11.2 Mechanical Data

Package Options

Mechanical Data (Package|Pins)
  • VMA|23
Thermal pad, mechanical data (Package|Pins)
Orderable Information

6.8 Typical Characteristics

TPS1685 Power Up Sequencing Using Input Supply with EN connected to VIN through Resistor
Input supply ramped up
Figure 6-1 Power Up Sequencing Using Input Supply with EN connected to VIN through Resistor
TPS1685 Inrush Current Control with Capacitive Load
COUT = 144uF, CdVdt = 22nF
Figure 6-3 Inrush Current Control with Capacitive Load
TPS1685 Peak Current Support Until Transient Overcurrent Blanking Timer expires
IOCP = 22A, tITIMER = 1.4 ms, IOUT pulsed above the IOCP threshold for short duration without triggering circuit-breaker response
Figure 6-5 Peak Current Support Until Transient Overcurrent Blanking Timer expires
TPS1685 Short-Circuit Protection Response
IOCP = 22A, Output hard-short to GND while in steady. IOUT rises above 2 × IOCP triggers fast-trip response
Figure 6-7 Short-Circuit Protection Response
TPS1685 Power Up Using EN/UVLO Pin
Input supply held steady, EN/UVLO pin toggled high
Figure 6-2 Power Up Using EN/UVLO Pin
TPS1685 Input Overvoltage Protection Response with OVP threshold= 65V
Input supply ramped up above 65V
Figure 6-4 Input Overvoltage Protection Response with OVP threshold= 65V
TPS1685 Overcurrent Protection Response (Circuit-Breaker)
IOCP = 50 A, tITIMER = 14 ms, IOUT stays above the IOCP threshold persistently to trigger circuit-breaker response
Figure 6-6 Overcurrent Protection Response (Circuit-Breaker)
TPS1685 Power Up into Short-Circuit
Device turned on using SWEN with output hard-short to GND. Device limits the current with foldback.
Figure 6-8 Power Up into Short-Circuit