環(huán)境供電MCU設(shè)計中的生存功率損耗

　　在創(chuàng)建基于單片機設(shè)計的環(huán)境能源動力，工程師們可以期待限電甚至間歇性損失。電源監(jiān)控和上電復(fù)位順序起著至關(guān)重要的作用，以確保正確的操作，這些設(shè)計。這些設(shè)計，工程師可以幫助確?？煽康牟僮髑闆r，通過一些簡單的技巧與ICS ATMEL，Diodes公司、仙童半導(dǎo)體，線性技術(shù)，麥瑞半導(dǎo)體芯片技術(shù)，半導(dǎo)體，Silicon Labs，意法半導(dǎo)體功率損失，德克薩斯文書，其中。

　　由環(huán)境能量供電，基于單片機的設(shè)計，如無線傳感器、智能設(shè)備，和新興的物聯(lián)網(wǎng)（IOT）微粒保持?jǐn)?shù)十年的理想承諾，無電池操作。在實踐中，任何實際的環(huán)境源可能會低于最低要求的功率水平，甚至?xí)簳r下降到零，因為，例如，陰影穿過太陽能電池或驅(qū)動壓電換能器的振動下降。

　　Energy storage devices such as supercapacitors or thin-film batteries can provide sustained power during periods of ambient energy decline or loss. In any real design， however， the combination of leakage current and MCU power consumption even in its ultra-low-power sleep mode could eventually drain available power reserves. In fact， designers cannot simply rely on MCU low-power modes to ensure available power in energy-limited harvesting designs. A typical MCU-based wireless sensor will likely consume significantly more overall power while in extended sleep states than in active states （Figure 1）。 Designers face this challenge even with devices available in the industry‘s lowest power MCU families， such as the Atmel tinyAVR， Microchip Technology XLP， Silicon Labs Zero Gecko， STMicroelectronics STM32 L1， Texas Instruments 8-MHz MSP430x1xx and 16-MHz MSP430x2xx， among other MCU series.