SLVSHS0A March   2025  – October 2025 TPS482H85-Q1

PRODUCTION DATA  

  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 SNS Timing Characteristics
    7. 6.7 Switching Characteristics_24V
    8. 6.8 Switching Characteristics_48V
    9. 6.9 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 Pin Current and Voltage Conventions
      2. 7.3.2 Accurate Current Sense
      3. 7.3.3 Adjustable Current Limit
      4. 7.3.4 Inductive-Load Switching-Off Clamp
      5. 7.3.5 Fault Detection and Reporting
        1. 7.3.5.1 Diagnostic Enable Function
        2. 7.3.5.2 Multiplexing of Current Sense
        3. 7.3.5.3 FLT Reporting
        4. 7.3.5.4 Fault Table
      6. 7.3.6 Full Diagnostics
        1. 7.3.6.1 Short-to-GND and Overload Detection
        2. 7.3.6.2 Open-Load Detection
          1. 7.3.6.2.1 Channel On
          2. 7.3.6.2.2 Channel Off
        3. 7.3.6.3 Short-to-Battery Detection
        4. 7.3.6.4 Reverse-Polarity and Battery Protection
        5. 7.3.6.5 Thermal Fault Detection
          1. 7.3.6.5.1 Thermal Protection Behavior
      7. 7.3.7 Full Protections
        1. 7.3.7.1 UVLO Protection
        2. 7.3.7.2 Loss of GND Protection
        3. 7.3.7.3 Loss of Power Supply Protection
        4. 7.3.7.4 Loss of VDD
        5. 7.3.7.5 Reverse Current Protection
        6. 7.3.7.6 Protection for MCU I/Os
    4. 7.4 Device Functional Modes
      1. 7.4.1 Operational Modes
  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
      3. 8.2.3 Application Curves
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Examples
        1. 8.4.2.1 Without a GND Network
        2. 8.4.2.2 With a GND Network
  10. 9 Device and Documentation Support
    1. 9.1 Third-Party Products Disclaimer
    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

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • CHU|12
Thermal pad, mechanical data (Package|Pins)
Orderable Information

7.3.5.2 Multiplexing of Current Sense

SEL pin is used to multiplex the shared current-sense function among the two channels within the same device. Pulling each pin high or low sets the corresponding channel to be output on the SNS pin if DIAG_EN is high. FLT pin in B variant represents a global interrupt that goes low if a fault occurs on any channel, except for open load and short-to-battery faults. For open load and short-to-battery faults, FLT goes low only if the selected channel has the fault.

If current sense information is multiplexed across different devices, do not directly tie the SNS pins together across multiple devices. When the DIAG_EN is LOW, there is an internal clamp at SNS pin that clamps the voltage to approximately 2V. One device SNS pin is able to affect the SNS readback of other devices if tied directly.

To use the SNS pin across multiple devices, connect individual SNS pin to different analog input pins of MCU; see Figure 7-10. Alternatively, use an external analog MUX to connect to a single MCU pin; see Figure 7-11.

TPS482H85-Q1 SNS Sharing Across Multiple Devices Method 1Figure 7-10 SNS Sharing Across Multiple Devices Method 1
TPS482H85-Q1 SNS Sharing Across Multiple Devices Method 2Figure 7-11 SNS Sharing Across Multiple Devices Method 2
Table 7-2 Diagnosis Configuration Table
DIAG_ENENxSELSNS ACTIVATED CHANNELSNS FLTPROTECTIONS AND DIAGNOSTICS
LH——0V. Clamp to 2V internally if external voltage is applied to the pin.See Fault TableSNS disabled, FLT reporting, full protection
LHigh-ZDiagnostics disabled, no protection
H—0Channel 1Fault TableSee Fault TableSee Fault Table
1Channel 2