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Microchip adds to programmable USB-port power controllers

It supports two ports, with eight programmable continuous current limits, ranging from 0.53 to 3.0A for each port, to enable faster charging times at higher currents, says the company. Integrated current monitoring, precision current limiting, charge rationing and dynamic thermal management protect and increase overall system uptime. The controller can be used in laptops, tablets, monitors, docking stations and printers in automotive, computing, education and aviation applications, as well as multi-port charging accessories and storage. It works individually, or in conjunction with USB hubs to create a charging and/or USB-communication system.


Dynamic thermal-management prevents shutdown as the current limit nears. This also allows for charging where other devices have stopped completely. The integrated current monitor eliminates the need for an external sense resistor and enables an ‘attach detect’ signal that does not need the main power to be active for hosts that are off or sleeping. Current monitoring and rationing help to manage multiple charging devices and can balance a dynamic load current for systems with smaller power supplies.


The controller is available in a 20pin QFN package.


An evaluation board to support the USB-port power controller is also available.




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