JAJSM08B December   2022  – August 2024 TPS281C30

PRODUCTION DATA  

  1.   1
  2. 1 特長
  3. 2 アプリケーション
  4. 3 概要
  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
    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
      1. 8.3.1 Working Mode
    4. 8.4 Feature Description
      1. 8.4.1 Accurate Current Sense
        1. 8.4.1.1 High Accuracy Sense Mode
      2. 8.4.2 Programmable Current Limit
        1. 8.4.2.1 Short-Circuit and Overload Protection
        2. 8.4.2.2 Capacitive Charging
      3. 8.4.3 Inductive-Load Switching-Off Clamp
      4. 8.4.4 Inductive Load Demagnetization
      5. 8.4.5 Full Protections and Diagnostics
        1. 8.4.5.1 Open-Load Detection
        2. 8.4.5.2 Thermal Protection Behavior
        3. 8.4.5.3 Undervoltage Lockout (UVLO) Protection
        4. 8.4.5.4 Overvoltage (OVP) Protection
        5. 8.4.5.5 Reverse Polarity Protection
        6. 8.4.5.6 Protection for MCU I/Os
        7. 8.4.5.7 Diagnostic Enable Function
        8. 8.4.5.8 Loss of Ground
        9. 8.4.5.9 Enhanced EFT Immunity
  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 61000-4-5 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 RGW Layout with a GND Network
      3. 9.4.3 Thermal Considerations
  11. 10Device and Documentation Support
    1. 10.1 ドキュメントの更新通知を受け取る方法
    2. 10.2 サポート・リソース
    3. 10.3 Trademarks
    4. 10.4 静電気放電に関する注意事項
    5. 10.5 用語集
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information

パッケージ・オプション

メカニカル・データ（パッケージ｜ピン）
サーマルパッド・メカニカル・データ
発注情報

5 Pin Configuration and Functions

TPS281C30 PWP Package,14-Pin HTSSOP(Top View)Figure 5-1 PWP Package,14-Pin HTSSOP(Top View)
TPS281C30 RGW Package,20-Pin QFN(Top View)Figure 5-2 RGW Package,20-Pin QFN(Top View)
Table 5-1 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 5-2 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.