Melexis has unveiled the MLX90833, a new pressure sensor featuring Triphibian™ technology, designed for accurate measurements of both gas and liquid media within a pressure range of 2 to 70 bar. Housed in a compact SO16 package, this factory-calibrated device offers absolute pressure readings with a LIN digital output, simplifying integration for heat pump manufacturers.
The Growing Complexity of Thermal Management Systems and the Need for LIN Outputs
As heat pump systems, particularly in electric vehicles (EVs), incorporate more heating and cooling modes, the demand for standalone sensors with digital interfaces has grown. These systems—comprising smart expansion valves, coolant pumps, and compressors—require efficient communication with the central control unit. Using a digital bus like LIN reduces wiring complexity, enhances system intelligence, and supports advanced diagnostics. This shift is particularly significant in Europe, where LIN is quickly replacing legacy analog sensor outputs.
Simplified System Design with Triphibian™ Technology
In battery electric vehicles (BEVs), heat pump systems may require five or more pressure and temperature sensors to maintain optimal performance. These sensors help regulate the high-voltage electric compressor and manage various expansion valves within the system. By integrating a LIN interface, the MLX90833 simplifies data transmission and system design compared to traditional analog or SENT connections.
Additionally, Melexis’ Triphibian™ products are factory calibrated, reducing development time and complexity for customers. Unlike non-Triphibian solutions, which require sourcing separate sensing elements, signal conditioning ICs, and end-of-line calibration equipment, the MLX90833 comes fully calibrated and ready for integration, streamlining module design and lowering manufacturing costs.
Key Features of the Melexis MLX90833:
- Extended Pressure Range: MEMS sensor measuring pressures up to 70 bar, exceeding the capabilities of traditional sensors.
- Gas and Liquid Compatibility: Provides precise readings for both gas and liquid media, simplifying system design.
- LIN Digital Output: Ensures seamless integration into bus-connected systems, reducing wiring complexity.
- Enhanced Durability: Equipped with protective features against overvoltage (above +40 V) and reverse voltage (below -40 V), making it ideal for demanding applications, including in trucks.
“The MLX90833 is a significant advancement for heat pump manufacturers,” said Laurent Otte, Senior Product Line Director at Melexis. “Its ability to handle high pressures and both gas and liquid media, combined with the LIN interface, simplifies system design and enhances overall efficiency.”
The MLX90833 is a fully integrated solution, incorporating a MEMS sensor, signal conditioning, and digital output drivers. It offers high accuracy (± 0.5% FSO) and is developed as a Safety Element out of Context (SEooC) under ISO 26262, ensuring compliance with the stringent safety requirements of modern EVs.
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