Automotive pump driver suits high ambient temperatures   

Melexis has expanded its MLX90412 range, with a 2.2A automotive-qualified pump/fan driver IC optimised for high ambient temperature levels. The MLX90412GLW single-coil pump/fan IC also supports prolonged operational lifetimes, says the company.    

The MLX90412GLW single-coil pump/fan IC with integrated driver stage is intended for applications with high ambient temperature such as automotive water pumps. It drives pumps up to 15W in internal combustion engines (ICEs) which are typically a maximum ambient operating temperature up to 135 degrees C. Water pumps up to 20W can be driven within the maximum ambient temperature of 85 degrees C for electric vehicles (EVs). 

The MLX90412GLW is qualified to meet up to 15,000 hours of EV applications such as battery cooling.

The dedicated automotive one-coil motor driver can be configured in a range of brushless DC (BLDC) options from sinewave mode. It is claimed to offer the lowest noise performance for EVs over a high torque mode, and a low EMI mode, for on/off applications requiring minimum external EMI filter components. 

It can also operate basic two-wire pumps with on/off functionality and variable speed pumps through a PWM interface with diagnostics feedback in a four-wire pump.  It can be complemented with the Melexis MLX81113 LIN MCU gateway to realise three wire LIN-based water pumps. 

The degree of integration reduces the number of external components required, compared to traditional pump ICs, says Melexis. 

For prototyping, there is a GUI which allows configuring all of the available options.  The full development can be completed without the need for any motor control software, allowing fast validation and time to market with minimum engineering resources. 

Melexis designs, develops and delivers micro-electronic devices, including mixed-signal semiconductor sensor and actuator components to integrate sensing, driving and communication into next-generation products and systems that improve safety, raise efficiency, support sustainability and enhance comfort.

It also manufactures automotive semiconductor sensors. Today, on average, every new car produced worldwide contains 13 Melexis chips, claims the company.

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