SLVSGD3A december   2022  – june 2023 TPS281C30

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Revision History
  6. 5 Device Comparison Table
  7. 6 Pin Configuration and Functions
  8. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Thermal Information
    6. 7.6 Electrical Characteristics
    7. 7.7 SNS Timing Characteristics
    8. 7.8 Switching Characteristics
    9. 7.9 Typical Characteristics
  9. 8 Parameter Measurement Information
  10. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Device Functional Modes
      1. 9.3.1 Working Mode
    4. 9.4 Feature Description
      1. 9.4.1 Accurate Current Sense
        1. 9.4.1.1 High Accuracy Sense Mode
      2. 9.4.2 Programmable Current Limit
        1. 9.4.2.1 Short-Circuit and Overload Protection
        2. 9.4.2.2 Capacitive Charging
      3. 9.4.3 Inductive-Load Switching-Off Clamp
      4. 9.4.4 Inductive Load Demagnetization
      5. 9.4.5 Full Protections and Diagnostics
        1. 9.4.5.1 Open-Load Detection
        2. 9.4.5.2 Thermal Protection Behavior
        3. 9.4.5.3 Undervoltage Lockout (UVLO) Protection
        4. 9.4.5.4 Overvoltage (OVP) Protection
        5. 9.4.5.5 Reverse Polarity Protection
        6. 9.4.5.6 Protection for MCU I/Os
        7. 9.4.5.7 Diagnostic Enable Function
        8. 9.4.5.8 Loss of Ground
  11. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
        1. 10.2.1.1 IEC 61000-4-5 Surge
      2. 10.2.2 Detailed Design Procedure
        1. 10.2.2.1 Selecting RILIM
        2. 10.2.2.2 Selecting RSNS
    3. 10.3 Power Supply Recommendations
    4. 10.4 Layout
      1. 10.4.1 Layout Guidelines
        1. 10.4.1.1 EMC Considerations
      2. 10.4.2 Layout Example
        1. 10.4.2.1 PWP Layout without a GND Network
        2. 10.4.2.2 PWP Layout with a GND Network
        3. 10.4.2.3 RGW Layout with a GND Network
      3. 10.4.3 Thermal Considerations
  12. 11Device and Documentation Support
    1. 11.1 Receiving Notification of Documentation Updates
    2. 11.2 Support Resources
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary
  13. 12Mechanical, Packaging, and Orderable Information

Package Options

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

6 Pin Configuration and Functions

GUID-20210524-CA0I-0KGG-W6DC-VVRVDPQGQBVF-low.svgFigure 6-1 PWP Package,14-Pin HTSSOP(Top View)
GUID-20210812-SS0I-1W3M-RHPB-T4BBHHJ1BKJ2-low.svgFigure 6-2 RGW Package,20-Pin QFN(Top View)
Table 6-1 Pin Functions
PIN TYPE DESCRIPTION
NAME PWP RGW
GND 1 18 Power Ground of device. Connect to resistor- diode ground network to have reverse polarity protection.
EN 2 15 I Input control for channel activation. Internal pulldown.
DIAG_EN 3 16 I Enable-disable pin for diagnostics and current sensing. Internal pulldown.
FAULT 4 17 O Open drain global fault output. Referred to FLT, or fault pin.
OL_ON 5 19 I Enable-disable pin for higher resolution current sense(Only available when IOUT< IKsns2_EN). Internal pulldown.
SNS 6 20 O Analog current output corresponding to load current. Connect a resistor to GND to convert to voltage.
ILIM 7 1 O Adjustable current limit. Connect a resistor to set the current limit. Optionally short to ground or leave pin floating to set the current limit to the default internal current limit. See the electrical characteristics for more information.
NC 11 2, 7, 8, 9, 14 N/A No internal connection.
VOUT 8, 9, 10 3, 4, 5, 6 Power Output of high side switch, connect to load.
VS 12, 13, 14 10, 11, 12, 13 Power Power supply input.
Pad Thermal Pad Pad — Thermal pad, internally shorted to ground.

Recommended Connection for Unused Pins

TPS281C30x is designed to provide an enhanced set of diagnostic and protection features. However, if the system design only allows for a limited number of I/O connections, some pins may be considered as optional.

Table 6-2 Connections for Optional Pins
PIN NAME CONNECTION IF NOT USED IMPACT IF NOT USED
SNS Ground through 10-kΩ resistor Analog sense is not available.
ILIM Float If the ILIM pin is left floating, the device will be set to the default internal current-limit threshold. This is considered a fault state for the device.
FAULT Float If the FAULT pin is unused, the system cannot read faults from the output.
DIAG_EN Float or ground through RPROT resistor With DIAG_EN unused, the analog sense, open-load, and short-to-supply diagnostics are not available.
OL_ON Ground through RPROT resistor With OL_ON unused, the high accuracy sense mode is not available.