SNOSAR2I September   2008  – June 2026 LMP8601-Q1 , LMP8602-Q1 , LMP8603-Q1

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: Vs = 3.3V
    6. 5.6 Electrical Characteristics: Vs = 5V
    7. 5.7 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
      1. 6.1.1 Theory of Operation
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Offset Input Pin
      2. 6.3.2 Additional Second-Order Low-Pass Filter
    4. 6.4 Device Functional Modes
      1. 6.4.1 Gain Adjustment
        1. 6.4.1.1 Reducing Gain
        2. 6.4.1.2 Increasing Gain
      2. 6.4.2 Driving Switched Capacitive Loads
  8. 7 Application and Implementation
    1. 7.1 Typical Applications
      1. 7.1.1 High-Side, Current-Sensing Application
        1. 7.1.1.1 Design Requirements
        2. 7.1.1.2 Detailed Design Procedure
        3. 7.1.1.3 Application Curve
      2. 7.1.2 Low-Side, Current-Sensing Application
      3. 7.1.3 Battery Current Monitor Application
      4. 7.1.4 Advanced Battery Charger Application
      5. 7.1.5 Current Loop Receiver Application
      6. 7.1.6 Power Supply Recommendations
      7. 7.1.7 Layout
        1. 7.1.7.1 Layout Guidelines
        2. 7.1.7.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Device Support
      1. 8.1.1 Development Support
    2. 8.2 Documentation Support
      1. 8.2.1 Related Documentation
      2. 8.2.2 Related Links
    3. 8.3 Receiving Notification of Documentation Updates
    4. 8.4 Support Resources
    5. 8.5 Trademarks
    6. 8.6 Electrostatic Discharge Caution
    7. 8.7 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

7.1.3 Battery Current Monitor Application

This application example shows how the LMP860x-Q1 can be used to monitor the current flowing in and out of a battery pack. The fact that the LMP860x-Q1 can measure small voltages at a high offset voltage outside the parts own supply range makes this part a very good choice for such applications. If the load current of the battery is higher then the charging current, the output voltage of the LMP860x-Q1 is above the half offset voltage for a net current flowing out of the battery. When the charging current is higher then the load current the output is below this half offset voltage.

LMP8601-Q1 LMP8602-Q1 LMP8603-Q1 Battery Current Monitor Application
NOTE: K2 = 2 for LMP8601-Q1; 5 for LMP8602-Q1; or 10 for LMP8603-Q1.
Figure 7-4 Battery Current Monitor Application