SNIS216 November   2019 TMP392

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Simplified Schematic
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 TMP392 Programming Tables
      2. 7.3.2 Trip Test
      3. 7.3.3 20°C Hysteresis
    4. 7.4 Device Functional Modes
  8. 8 Application and Implementation
    1. 8.1 Applications Information
    2. 8.2 Typical Applications
      1. 8.2.1 Simplified Application Schematic
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 Application Curves
      2. 8.2.2 TMP392 With 10°C Hysteresis
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
        3. 8.2.2.3 Application Curve
      3. 8.2.3 One Channel Operation for Hot Trip Point up to 124°C
        1. 8.2.3.1 Application Curve
      4. 8.2.4 One Channel Operation for Warm Trip Point from 30°C up to 105°C
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Receiving Notification of Documentation Updates
    2. 11.2 Support Resources
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

8.2.2.2 Detailed Design Procedure

SETA sets the +90°C threshold using 78.7 kΩ. SETB sets the +60°C trip point and 10°C hysteresis using 249 kΩ. These values were determined using Table 1 and Table 2. These resistors should have maximum of 1% tolerance at room temperature and 100 ppm/°C or less over the desired temperature range. A summary of the resistor settings used in this example is shown in Table 3. See Table 1 and Table 2 for additional trip points and hysteresis configurations.

The switching output of the TMP392 can be visualized with the output diagram shown in Figure 12. It is key to notice that hysteresis is subtracted from both Channel A and Channel B threshold values. OUTA remains high until the sensor reaches +90°C where the output goes low, and returns high after the temperature drops back down to +80°C. OUTB remains high until the sensor reaches +60°C where the output goes low, and returns high after the temperature drops back down to +50°C.

Table 3. Example Resistor Settings and Trip Points

CHANNEL RESISTOR SETTING (kΩ) HYSTERESIS (°C) TRIP TEMPERATURE (°C)
SETA 78.7 10 +90
SETB 249 +60