HT69F3742x Solar Power Application Note
Solar energy is an inexhaustible energy sources. Solar panels are devices that convert light energy into electrical energy using semiconductor materials to generate a voltage potential instead of electrolytes to transfer conductive ions. However solar panels used in general consumer products tend to have a poor conversion efficiency and low power. For example, a 4-c ell PN amorphous silicon structure used in a solar calculator can provide a voltage of 1.5V~2.8V and a maximum current of 6μA according to the load, where the voltage or current depends on light intensity.
In solar cell product applications, dual power supply circuits are usually provided to ensure that the products can continue to operate in the absence of solar energy. In addition to the solar cell power supply, in general applications, the additional power source can be batteries, NFC and other types of sustainable supplies.
The HT69F3742 and HT69F3742L devices are Flash Memory type 8-bit high performance RISC architecture microcontrollers specially designed for ultra-low voltage applications, especially solar panel and single battery applications. These devices provide a power switch function, which can control the MCU power supply source, thus implementing a dual power switching function. This application note takes the HT69F3742 and HT69F3742L as examples to illustrate dual power switching applications between a solar cell and an NFC harvesting energy source and the usage of related functions, so as to provide product development reference solutions.
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Flash Memory type 8-bit high performance RISC architecture microcontrollers |
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[ ultra-low voltage applicatiused ][ solar panel and single battery applications ] |
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Application note & Design Guide |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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December 9, 2020 |
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V1.00 |
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AN0572EN |
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1 MB |
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