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Texas Instruments TMP390/TMP390-Q1 Programmable Temperature Switches

Texas Instruments TMP390/TMP390-Q1 Resistor-Programmable Temperature Switches are ultra-low power, dual-channel, resistor-programmable temperature switches. These switches enable protection and detection of system thermal events from –50°C to 130°C. The TMP390/TMP390-Q1 offers independent over-temperature (hot) and under-temperature (cold) detection. The trip temperatures (TTRIP) and thermal hysteresis (THYST) options are programmed by two E96-series (1%) standard decade value resistors on the SETA and SETB pins. Each resistor can range from 1.05KΩ to 909KΩ, representing one of 48 unique values.

The values of the resistor to ground on SETA input set the TTRIP threshold of Channel A. The value of the resistor to ground on SETB input sets the TTRIP threshold of Channel B and the THYST options of 5°C or 10°C for both channels to prevent undesired digital output switching. Resistor accuracy has no impact on TTRIP accuracy. To enable customer board-level manufacturing, the TMP390/TMP390-Q1 supports a trip test function where the digital outputs are activated by exercising the SETA or SETB pin. The Texas Instruments TMP390-Q1 devices are AEC-Q100 qualified for automotive applications.

Features

  • Resistor programmable temperature trip points and hysteresis options
    • Resistor tolerances contribute zero error
    • Hysteresis options: 5°C, and 10°C
  • Separate outputs for over-temperature or under-temperature detection
    • Channel A (over-temperature): +30 to +124°C, 2°C steps
    • Channel B (under temperature): –50 to +25°C, 5°C steps
  • Accuracy level options (maximum at −55°C to +130°C)
    • A2 Level: ±3.0°C (±1.5°C from 0°C to +70°C)
    • A3 Level: ±3.5°C (±2.0°C from 0°C to +70°C)
  • Ultra-low power consumption: 0.5µA typical at 25°C
  • Operating temperature range: −55°C to +130°C
  • Supply voltage: 1.62 to 5.5V
  • Open-drain outputs
  • The trip test function enables in-system testing
  • Available in an SOT-563 (1.60mm×1.20mm), 6-pin package

Applications

  • DC/AC inverter
  • DC/DC converter
  • Temperature transmitters
  • Environmental control systems (ECS)
  • Power tools
  • Power banks
  • Wireless infrastructure
    • WLAN/Wi-Fi access points
    • Core routers
    • Edge routers
    • Macro remote radio units (RRU)

Datasheets

Simplified Schematic

Schematic - Texas Instruments TMP390/TMP390-Q1 Programmable Temperature Switches

Related Development Tools

Texas Instruments TMP390EVM/TMP392EVM Switch Evaluation Modules

Plug-and-play systems to test and evaluate the TMP390 or TMP392 analog temperature switch.

Learn Moretungkol sa Texas Instruments TMP390EVM/TMP392EVM Switch Evaluation Modules View Productskaugnay ng Texas Instruments TMP390EVM/TMP392EVM Switch Evaluation Modules
Inilathala: 2019-07-22 | Na-update: 2025-08-21