Texas Instruments TMP392 Dual-Channel Temperature Switch
Texas Instruments TMP392 Dual-Channel Temperature Switch is an ultra-low-power, dual-channel, resistor programmable temperature switch that enables protection and detection of system thermal events from 30°C to 130°C. The Texas Instruments TMP392 offers dual overtemperature (hot and warm) detection. The trip temperatures (TTRIP) and thermal hysteresis (THYST) options are programmed by two E96-series resistors (1% tolerance) on the SETA and SETB pins. Channel A resistors can range from 1.05KΩ to 909KΩ, representing one of 48 unique values. Channel B resistors can range from 10.5KΩ to 909KΩ.
The value of the resistor to ground on SETA input sets the TTRIP threshold of Channel A. The value of the resistor to ground on SETB input sets the TTRIP threshold of Channel B, as well as the THYST options of 5°C, or 10°C for both channels, to prevent undesired digital output switching. When the SETB input is connected to ground, Channel A operates with 20°C hysteresis. Resistors' accuracy has no impact to TTRIP accuracy. To enable customer board-level manufacturing, the TMP392 supports a trip test function where the digital outputs are activated by exercising the SETA or SETB pin.
Features
- Resistor programmable temperature trip points and hysteresis options
- Resistor tolerances contribute zero error
- 5°C, 10°C and 20°C hysteresis options
- Dual outputs for over-temperature detection
- Channel A (over temperature-hot): +30 to +124°C, two °C steps
- Channel B (over temperature-warm): +30 to +105°C, five °C steps
- Accuracy level options (maximum at +30°C to +130°C)
- A2 Level: ±3.0°C (±1.5°C from +30°C to +70°C)
- A3 Level: ±3.5°C (±2.0°C from +30°C to +70°C)
- 0.5 µA typical at 25°C ultra-low power consumption
- 1.62 to 5.5V supply voltage
- Open-drain outputs
- The trip test function enables in-system testing
- Available in a 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
- Lighting control
- Industrial robots
- Machine vision
- STB and DVR
- WLAN/Wi-Fi access points
Functional Block Diagram
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.
Texas Instruments TMP392EVM Evaluation Module
A plug and play system to test and evaluate the TMP392 analog temperature switch.