HARDKERNEL ODROID-XU4 User Manual
Also see for ODROID-XU4: User manual
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Contents
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10 ODROID-XU4 USER MANUALUSB VBUS controllerA NCP380 Protection IC for USB power supply from OnSemi.Boot media selectorThe eMMC/SD card switch on the side of the board selects theboot media.Power supply circuitDiscrete DC-DC converters LDOs are used for CPU/DRAM/IOpower supply.Power protector ICThe power protected is a NCP372 over-voltage, over-current,reverse-voltage protection IC from OnSemi.Heat Sink and fanElectronic components all generate heat while operating, andElectronic components all generate heat while operating, and differentcomponents generate different levels of heat. Some components donot require any cooling, while others do.Complex components such as the XU4 processor may reachtemperatures as high as 95°C. At high temperatures, the processorwill throttle itself and operate slower so that temperatures do not con-tinue to increase. Some owners prefer that the temperatures do notreach such high levels and install a heat sink, which is available fromthe Hardkernel store. Heat transfer from components to the surround-ing air is related to the surface area available to transfer heat to thesurrounding air. The processor of the XU4 provides a relatively smallarea to dissipate heat. The heat sink is much larger and is thereforeable to dissipate more heat into the surrounding air than the processoritself.The fan provides additional cooling by drawing air across theheat sink, and is controlled through software to vary the amount ofcooling depending on the temperature of the heat sink.Chapter 1 |
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