SBOS206F January   2001  – October 2023 OPA561

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 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Feature Description
      1. 6.2.1 Adjustable Current Limit
        1. 6.2.1.1 Current Limit Accuracy
        2. 6.2.1.2 Setting the Current Limit
      2. 6.2.2 Enable-Status (E/S) Pin
        1. 6.2.2.1 Output Disable
        2. 6.2.2.2 Maintaining Microcontroller Compatibility
      3. 6.2.3 Overcurrent Flag
  8. 7 Application and Implementation
    1. 7.1 Application Information
      1. 7.1.1 Output Stage Compensation
      2. 7.1.2 Output Protection
      3. 7.1.3 Thermal Protection
      4. 7.1.4 Power Dissipation
      5. 7.1.5 Heat-Sink Area
      6. 7.1.6 Amplifier Mounting
        1. 7.1.6.1 What is the PowerPAD™ Integrated Circuit Package?
        2. 7.1.6.2 PowerPAD™ Integrated Circuit Package Assembly Process
    2. 7.2 Typical Application
      1. 7.2.1 Laser Diode Driver
      2. 7.2.2 Programmable Power Supply
      3. 7.2.3 Power-Line Communication Modem
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Device Support
      1. 8.1.1 Third-Party Products Disclaimer
    2. 8.2 Receiving Notification of Documentation Updates
    3. 8.3 Support Resources
    4. 8.4 Trademarks
    5. 8.5 Electrostatic Discharge Caution
    6. 8.6 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

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机械数据 (封装 | 引脚)
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6.2.1.2 Setting the Current Limit

Do not float the ILIM pin or damage to the device is possible. Connect ILIM directly to V− to program the maximum output current limit, typically 1.2 A. The simplest method for adjusting the current limit (ILIM) uses a resistor or potentiometer connected between the ILIM pin and V− according to the following equation:

Equation 1. I L I M = 1.2 V R C L + 10 k Ω   × 10,000

This external resistor determines a small internal current which sets the desired output current limit. Alternatively, the output current limit can be set by applying a voltage to the ILIM pin. Figure 6-1 shows a simplified schematic of the OPA561 current limit.

GUID-20230614-SS0I-GR2D-DM33-VLDGFBN1K78R-low.svg Figure 6-1 Adjustable Current Limit — Resistor Method
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