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Recently, several Qualcomm executives, including Michelle Leyden Li, senior marketing director of CDMA technology, TIm Leland, senior director of GPU product management, and Tavis Lanier, director of CPU product management, talked about many aspects of the mobile platform, especially the power consumption and heat of the chip. . Qualcomm believes that 45 ° C is the highest temperature allowed by mobile processors, while the thermal design power of mobile phone processors can only allow 2.5-3W at most, and the tablet can be relaxed to 5W.
Note that thermal design power is not the energy consumed by the chip itself, but an indicator of the thermal design.
According to Qualcomm, these two sets of data are the limits of the mobile processor to maintain passive cooling. If it is high, it must use active cooling, which is unimaginable in the mobile phone. No one in the tablet has ever seen it.
Qualcomm said that their Xiaolong 800 and Xiaolong 600 are designed according to the above objectives, so the highest frequency can only run to 1.9GHz and 2.3GHz respectively.
However, Qualcomm pointed out that the thermal design power consumption of the mobile processor allows for a short time of more than 3W or 5W, but at most it can only be a few seconds. If it is long, it will not only affect the battery life, but also cause the temperature to exceed 45 °C. equipment.
According to Qualcomm's theory, NVIDIA Tegra 4 is destined to live only in the tablet, and even in the tablet will be very difficult, because its thermal design power is just 5W.SHIELD handheld machine is equipped with a fan. It seems a bit tragedy. The Cortex-A15 architecture is not easy.
AMD Temash APU's lowest-end A4-1200 thermal design power consumption is 3.9W, so it is easy to use in the tablet, but the mobile phone should not be expected, not to mention the phone is not just a U problem.
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