SNIS151C August   2008  – January 2024 LM26NV

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 Operating Ratings
    3. 5.3 LM26NV Electrical Characteristics
  7. 6 Detailed Description
    1. 6.1 Functional Block Diagram
    2. 6.2 Feature Description
      1. 6.2.1 LM26NV OPTIONS
      2. 6.2.2 Output Pin Options Block Diagrams
  8. 7 Application and Implementation
    1. 7.1 Application Information
      1. 7.1.1 Noise Considerations
      2. 7.1.2 Mounting Considerations
    2. 7.2 Typical Applications
  9. 8 Device and Documentation Support
    1. 8.1 Device Nomenclature
    2. 8.2 Documentation Support
    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

Package Options

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

7.2 Typical Applications

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The fan's control pin has an internal pull-up. The 10 kOhm pull-down sets a slow fan speed. When the output of the LM26NV goes low, the fan will speed up.
Figure 7-1 Two Speed Fan Speed Control
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The LM26NV switches the fan on when the measured temperature exceeds the trip temperature.
Figure 7-2 Fan High Side Drive
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The LM26LV sinks causes the switch to sink the fan current when the measured temperature exceeds the trip temperature.
Figure 7-3 Fan Low Side Drive
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By thermally coupling the LM26NV to the audio power amplifier, the LM26NV safeguards the amplifier from overheating, turning on the fan when it temperature exceeds the trip temperature.
Figure 7-4 Audio Power Amplifier Thermal Protection
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When the measured temperature is below the trip temperature of the LM26NV, the OS output will be high, causing the switch and relay to close. When the temperature exceeds the trip point, OS goes low and shuts off the relay and heater.
Figure 7-5 Simple Thermostat