power management

UHF Transceiver/Transmitter/Receiver: Pin-to-pin and software compatible devices are available offering a easy way of scalability from standard one way communication to high-end bi-directional communication. The UHF device family comes with an easy to use SPI interface where all parameters of a UHF link could be configured. All building blocks of a ti Datasheet system are integrated in the devices requiring only one external oscillator, a matching network and the UHF antenna itself. The receiver and transceiver comes with a integrated polling mode (wake on radio).
Power management: The power supply is connected to the 12V or 24V board net and regulates down/up to voltages for DSP, uC, memory and ICs and functions DVD drive, communication interfaces, display biasing and back lighting. The need for many different power rails makes the design of the power supply a critical task when trying to design for size, cost and efficiency. Linear regulators with low quiescent current help reduce battery leakage current during standby operating modes (ignition off), are load dump voltage tolerant for directly battery connected devices, and need low drop out and tracking for low battery crank operation. Beyond providing increased conversion efficiencies, switching power supplies provide EMI improvement with slew rate control of the switching FET, Frequency hopping, spread spectrum or triangulation method for attenuation of peak spectral energy, Low Iq, soft start for power sequencing and in rush current limitation, Phased switching for multiple SMPS's regulators to minimize input ripple current and lower input capacitance, higher switching frequency for smaller components (74FCT162652ATPVCT ), and SVS functions for brown out indications.