JAJSCZ9C September   2016  – March 2019 INA302 , INA303

PRODUCTION DATA.  

  1. 1 特長
  2. 2 アプリケーション
  3. 3 概要
    1.     Device Images
      1.      代表的なアプリケーション
  4. 4 改訂履歴
  5. 5 概要（続き）
  6. 6 Pin Configuration and Functions
    1.     Pin Functions
  7. 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 Electrical Characteristics
    6. 7.6 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Bidirectional Current Sensing
      2. 8.3.2 Out-of-Range Detection
      3. 8.3.3 Alert Outputs
        1. 8.3.3.1 Setting Alert Thresholds
          1. 8.3.3.1.1 Resistor-Controlled Current Limit
            1. 8.3.3.1.1.1 Resistor-Controlled Current Limit: Example
          2. 8.3.3.1.2 Voltage-Source-Controlled Current Limit
        2. 8.3.3.2 Hysteresis
    4. 8.4 Device Functional Modes
      1. 8.4.1 Alert Operating Modes
        1. 8.4.1.1 Transparent Output Mode
        2. 8.4.1.2 Latch Output Mode
  9. 9 Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 Selecting a Current-Sensing Resistor (RSENSE)
        1. 9.1.1.1 Selecting a Current-Sensing Resistor: Example
      2. 9.1.2 Input Filtering
      3. 9.1.3 Using the INA30x With Common-Mode Transients Greater Than 36 V
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
      3. 9.2.3 Application Curve
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12デバイスおよびドキュメントのサポート
    1. 12.1 ドキュメントのサポート
      1. 12.1.1 関連資料
    2. 12.2 関連リンク
    3. 12.3 ドキュメントの更新通知を受け取る方法
    4. 12.4 コミュニティ・リソース
    5. 12.5 商標
    6. 12.6 静電気放電に関する注意事項
    7. 12.7 Glossary
  13. 13メカニカル、パッケージ、および注文情報

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

9.2.2 Detailed Design Procedure

To achieve bidirectional monitoring, drive the reference pin halfway between the supply with a resistor divider buffered by an op amp, as shown in Table 5. To reduce the current draw from the supply, use 100-kΩ resistors to create the divide-by-two voltage divider. The TLV313-Q1 is selected to buffer the voltage divider because this device can operate from a single-supply rail with low IQ and offset voltage. To minimize the response time of the ALERT2 output, a 100-kΩ pullup resistor was added from the DELAY pin to the VS pin. Select values for RSENSE, RLIMIT2, and RLIMIT1 based on the desired current-sense levels and trip thresholds using the information in the Resistor-Controlled Current Limit and Selecting a Current-Sensing Resistor (RSENSE) sections. For this example, the values of RLIMIT1 and RLIMIT2 were selected so that the positive and negative overcurrent thresholds are the same. Table 5 shows the alert output of the INA303 application circuit with the capability to detect both positive and negative overcurrent conditions.

Table 5. Bidirectional Overcurrent Output Status

OVERCURRENT PROTECTION (OCP) STATUS OUTPUT
Positive overcurrent detection (OCP+) 0
Negative overcurrent detection (OCP–) 0
Normal operation (no OCP) 1