High-Power LF Initiator IC integrates immobilizer functionality.
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Press Release Summary:
Supplied in 48-pin TQFP, MLX74190 consists of 2 independently programmable low-frequency (LF) drivers and 2 built-in immobilizers. Device can be programmed to generate sine (1 A peak) or square (2.5 A peak) waves with frequencies from 109–140 kHz and output amplitude from 0.25–32 V peak-to-peak. Drivers can be used in full- or half-bridge configurations, and amplitude-shift keying (ASK) or phase-shift keying (PSK) modulation can be used to transmit LF telegrams to key or LF receiver.
Original Press Release:
High Power Two-Fold Low Frequency Initiator Device with Integrated Immobilizer Functionality
Tessenderlo, Belgium — 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. Conversely it can serve as a ‘dead man switch’ so that if the driver falls off then the engine is automatically cut. In addition, it may be incorporated into building access systems, tire pressure monitoring system (TPMS) initiators and pet identification systems.
Both of the LF drivers can be programmed to generate sine (1A peak maximum) or square (2.5A peak maximum) waves with frequencies between 109kHz and 140kHz and an output amplitude from 0.25V to 32V peak-to-peak. These drivers can be used in either full-bridge or half-bridge configurations and have sophisticated protection mechanisms which safeguard them against over-current and over-temperature conditions. Amplitude-shift keying (ASK) or phase-shift keying (PSK) modulation can be used to transmit LF telegrams to the key or LF receiver. A very flexible data programing method, allows supporting a large variety of encoding types.
The two built-in immobilizers support ASK and frequency-shift keying (FSK) modulations. These can be employed should the key’s battery become depleted and therefore unable to generate a signal. Under such circumstances passive RFID communication can be initiated when the key comes into close proximity of the initiator device. The immobilizers are compatible with the most popular types of passive transponders
The diagnostic capabilities of the MLX74190 make it possible to detect various forms of misconnection with the LF antenna (such as short to GND, short to Vbat, open load or incorrect resonance frequency). The device comes in a compact 48-pin TQFP package. An operational temperature range of -40°C to 105°C is supported. Unit pricing begins at $2.76 for 10k volumes. For more information visit: http://www.melexis.com/General/General/MLX74190-742.aspxÂ
Contact Melexis
Marketing
Peter Riendeau
Melexis Inc
15 Trafalgar Sq., Ste. 100
Nashua, NH 03063
USA
Tel: 603-204-2900
Fax: 603 578-1270
pre@melexis.com
Sales
Diane Thill
Melexis Inc
27333 Meadowbrook Road
Suite 200 Novi MI 48377
USA
Tel: 248-306-5400
Fax: 248-662-2041
dth@melexis.com
About Melexis
Melexis Microelectronic Integrated Systems N.V. (Euronext Brussels:MELE) imagines, creates and delivers innovative mixed signal integrated circuits. Melexis ICs are driving green solutions that enable our customers to bring more energy efficient automotive systems to market. Melexis product portfolio addresses 4 classes of ICs; Sensor, Optoelectronic, Wireless and Actuators. Sensors include magnetic, MEMS, and sensor interface ICs. Optoelectronic products encompass linear arrays, single point sensors, infrared thermometers and CMOS wide dynamic range and night vision cameras. Wireless ICs focus on RKE, TPMS, ISM band applications, NFC, RFID reader and smart tag solutions. Actuator ICs cover LIN and CAN bus networking ICs and advanced BLDC motor driver technology. Melexis is proud of its participation toward reducing the human race's global environmental footprint.
For more information visit www.melexis.com
Issued by:
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Pinnacle Marketing Communications Ltd
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