MELEXIS MLX74190 low-frequency (LF) initiator IC consists of two high power, independently programmable LF drivers plus built-in immobilizers. 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. 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.
