SLVSH72 December   2023 TPS281C100

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Options
  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
    8. 6.8 Typical Characteristics
  8. 7 Parameter Measurement Information
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Device Functional Modes
    4. 8.4 Working Mode
    5. 8.5 Feature Description
      1. 8.5.1 Accurate Current Sense
        1. 8.5.1.1 High Accuracy Sense Mode
      2. 8.5.2 Programmable Current Limit
        1. 8.5.2.1 Short-Circuit and Overload Protection
        2. 8.5.2.2 Capacitive Charging
      3. 8.5.3 Inductive-Load Switching-Off Clamp
      4. 8.5.4 Inductive Load Demagnetization
      5. 8.5.5 Full Protections and Diagnostics
        1. 8.5.5.1 Open-Load Detection
        2. 8.5.5.2 Thermal Protection Behavior
        3. 8.5.5.3 Undervoltage Lockout (UVLO) Protection
        4. 8.5.5.4 Reverse Polarity Protection
        5. 8.5.5.5 Protection for MCU I/Os
        6. 8.5.5.6 Diagnostic Enable Function
        7. 8.5.5.7 Loss of Ground
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
        1. 9.2.1.1 IEC 61000-4-4 EFT
        2. 9.2.1.2 IEC 61000-4-5 Surge
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Selecting RILIM
        2. 9.2.2.2 Selecting RSNS
    3. 9.3 Power Supply Recommendations
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
        1. 9.4.1.1 EMC Considerations
      2. 9.4.2 Layout Example
        1. 9.4.2.1 PWP Layout Without a GND Network
        2. 9.4.2.2 PWP Layout With a GND Network
        3. 9.4.2.3 DNT Layout Without a GND Network
      3. 9.4.3 Thermal Considerations
  11. 10Device and Documentation Support
    1. 10.1 Receiving Notification of Documentation Updates
    2. 10.2 Support Resources
    3. 10.3 Trademarks
    4. 10.4 Electrostatic Discharge Caution
    5. 10.5 Glossary
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

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

5 Pin Configuration and Functions

Figure 5-1 PWP Package,14-Pin HTSSOP(Top View)
Figure 5-2 DNT Package,12-Pin WSON(Top View)
Table 5-1 Pin Functions
PINTYPEDESCRIPTION
NAMEPWPDNT
GND1PadPowerGround of device. Connect to resistor- diode ground network to have reverse polarity protection.
EN212IInput control for channel activation. Internal pulldown.
DIAG_EN311IEnable-disable pin for diagnostics and current sensing. Internal pulldown.
FAULT410OOpen drain global fault output. Referred to FLT, or fault pin. Active LOW signal.
OL_ON51IEnable-disable pin for higher resolution current sense(Only available when IOUT < IKsns2_EN). Internal pulldown.
SNS62OAnalog current output corresponding to load current. Connect a resistor to GND to convert to voltage.
ILIM73OAdjustable 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.
NC114, 9N/ANo internal connection.
VOUT8, 9, 105, 6PowerOutput of high side switch, connect to load.
VS12, 13, 147, 8PowerPower supply input.
PadThermal PadPad—Thermal pad, internally shorted to ground.

Recommended Connection for Unused Pins

TPS281C100x 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 5-2 Connections for Optional Pins
PIN NAMECONNECTION IF NOT USEDIMPACT IF NOT USED
SNSGround through 10-kΩ resistorAnalog sense is not available.
ILIMFloatIf the ILIM pin is left floating, the device will be set to the default internal current-limit threshold.
FAULTFloatIf the FAULT pin is unused, the system cannot read faults from the output.
DIAG_ENFloat or ground through RPROT resistorWith DIAG_EN unused, the analog sense, open-load, and short-to-supply diagnostics are not available.
OL_ONGround through RPROT resistorWith OL_ON unused, the high accuracy sense mode is not available.