Dynamic thermal management maximises system uptime

10th November 2015

Nat Bowers

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Datasheet

Expanding its programmable USB-port power controller portfolio, Microchip Technology has announced a dual-channel USB-port power controller. The UCS2112 helps designers to address a wide array of host devices, such as the laptops, tablets, monitors, docking stations and printers found in automotive, computing, education and aviation applications, as well as multi-port charging accessories and storage.

Eight programmable continuous current limits, from 0.53 to 3.0A for each port, enables faster charging times at higher currents. Features for protecting and increasing overall system uptime also include integrated current monitoring, precision current limiting, charge rationing and dynamic thermal management. This device has the flexibility to work individually, or in conjunction with USB hubs, to create a complete charging and/or USB-communication system.

For a better end-user experience, the UCS2112’s dynamic thermal-management feature throttles back the current limit as it approaches the thermal limit, preventing shutdown and allowing for charging where other devices have stopped completely. The UCS2112’s integrated current monitor eliminates the need for an external sense resistor and enables an 'attach detect' signal that does not rely on the main power to be active for hosts that are off or sleeping. Current monitoring and rationing also help to manage multiple charging devices and can balance a dynamic load current for systems with smaller power supplies.

The UCS2112 also aligns with the USB Power Delivery initiatives from the USB Industry Forum, and is in compliance with various charging specifications, including the USB-IF BC1.2. The UCS2112 USB-port power controller is supported by Microchip’s UCS2112 evaluation board (ADM00639) priced at $140.

The UCS2112 is available now for sampling and volume production in a 20-pin QFN package.