12 V input power monitor
15 April 2009
Power Electronics / Power Management
International Rectifier has introduced the IR3725 input power monitor IC with digital I²C interface for low-voltage DC-DC converters used in energy-efficient CPU, server and storage applications. The device is a highly versatile input power, voltage and current monitor IC for 12 V power supplies. Unlike alternative solutions that depend on costly A/D converters to measure a system’s power, the new device utilises patent-pending TruePower technology to output average power during a specified interval over a serial digital interface. This information is used by the system controller to optimise overall power consumption, delivering current accuracy of 1,0%. With a voltage accuracy of 1,5%, the IR3725 provides design engineers with the option to use resistive sensing or inductor DCR current sensing with an internal thermal compensation feature to achieve high efficiency while reducing component count and board size.
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