SLVSGL6B July   2022  – October 2026 TPS1HC30-Q1

PRODUCTION DATA  

  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
    6. 5.6 SNS Timing Characteristics
    7. 5.7 Switching Characteristics
    8. 5.8 Typical Characteristics
  7. 6 Parameter Measurement Information
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Accurate Current Sense
      2. 7.3.2 Programmable Current Limit
        1. 7.3.2.1 Current Limit Accuracy Across VDS
        2. 7.3.2.2 Capacitive Charging
      3. 7.3.3 Inductive-Load Switching-Off Clamp
      4. 7.3.4 Full Protections and Diagnostics
        1. 7.3.4.1  Short-Circuit and Overload Protection
        2. 7.3.4.2  Open-Load and Short-to-Battery Detection
        3. 7.3.4.3  Short-to-Battery Detection
        4. 7.3.4.4  Reverse-Polarity and Battery Protection
        5. 7.3.4.5  Latch-Off Mode
        6. 7.3.4.6  Thermal Protection Behavior
        7. 7.3.4.7  UVLO Protection
        8. 7.3.4.8  Loss of GND Protection
        9. 7.3.4.9  Loss of Power Supply Protection
        10. 7.3.4.10 Reverse Current Protection
        11. 7.3.4.11 Protection for MCU I/Os
      5. 7.3.5 Diagnostic Enable Function
    4. 7.4 Device Functional Modes
      1. 7.4.1 Working Mode
  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
        1. 8.2.2.1 Dynamically Changing Current Limit
        2. 8.2.2.2 EMC Transient Disturbances Test
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
        1. 8.4.2.1 Without a GND Network
        2. 8.4.2.2 With a GND Network
      3. 8.4.3 Thermal Considerations
  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

8.2.1 Design Requirements

Component

Description

Purpose

TVS

SMBJ36CA (optional)

Filter voltage transients coming from battery (ISO7637-2)

CVBB

220nF (optional)

Better EMI performance

CIC

100nF

Minimal amount of capacitance on input for EMI mitigation

CBULK

2μF – 10μF (optional)

There to hold the rail for the LDO; however, helps to filter voltage transients on supply rail. Not a requirement but can be useful for ISO7637-2 transients.

RPROT

5k

Protection resistor for microcontroller and device I/O pins

RILIM

7k–70k

Set current limit threshold

RSNS

1k

Translate the sense current into sense voltage.

CFILTER

100nF

Coupled with RPROT on the SNS line creates a low-pass filter to filter out noise going into the ADC of the MCU

CVOUT

22nF

Improves EMI performance, filtering of voltage transients

RGND

1kΩ

Stabilize GND potential during turn-off of inductive load

DGND

BAS21 Diode

Keeps GND close to system ground during normal operation