High Power Two-Fold Low Frequency Initiator Device with Integrated Immobilizer Functionality

by donpedro

Utilizing its expertise in wireless technology and passive entry/start systems for automotive, Melexis introduces the MLX74190. This low-frequency (LF) initiator IC, consists of two high power, independently programmable LF drivers plus built-in immobilizers. The device is highly suited to a variety of different wireless communication deployments where power efficient operation is of prime importance, in such diverse sectors as automotive, safety and building automation. One of the main applications for this device is automobile remote passive start, where it is used to transmit a high power LF signal to wake-up the key inside the car. The key sends out its encrypted identification number to the car via an ultra-high frequency (UHF) signal, enabling the engine to start. It can also serve for a similar purpose with other vehicles, such as motorcycles, scooters, all-terrain vehicles (ATVs), jet skis, snowmobiles and motorboats, where the key holder can be detected when approaching the engine and will be able to activate it from a ‘Start’ button.


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