SBOS486I July   2009  – December 2018 TMP303

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      TMP303 Functional Block Diagram
      2.      Typical Trip Threshold Accuracy at -20°C to 125°C
  4. 4 Revision History
  5. 5 Device Options
  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 HYSTSET0, HYSTSET1 and SOH Functionality
      2. 8.3.2 TMP303 Power Up and Timing
    4. 8.4 Device Functional Modes
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 TMP303 Typical Configuration
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
        3. 9.2.1.3 Application Curves
      2. 9.2.2 TMP303 With Switches
      3. 9.2.3 Simple Fan Controller
      4. 9.2.4 Wireless Fixed Temperature Heat Detector
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Receiving Notification of Documentation Updates
    2. 12.2 Community Resources
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

9.2.3 Simple Fan Controller

The circuit in Figure 17 senses system temperature and turns a cooling fan on when the sensor's temperature exceeds a preselected value. The TMP303 device can be used directly to control the fan. The OUT pin is active high, and it can be used directly to drive the DC fan. When temperature is within the temperature limits of the system, the fan turns off, and when the temperature exceeds the trip-point, the fan turns on. In this example, the TMP303A device is used and is configured with a 1°C hysteresis window (HYSTSET0 = HYSTSET1 = GND). The TMP303A high trip-point is 60°C. When this trip-point temperature is exceeded, the output (OUT) changes state from low to high. The output does not return to its low state until the temperature decreases below
(TH – hysteresis) = 59°C.

TMP303 TMP303_FanControl.gifFigure 17. Simple Fan Controller