資料來源:https://www.sparkfun.com/products/9946
This breakout board uses the LTC3588 Piezoelectric Energy Harvester from Linear Technologies. This board can be used not only for harvesting piezoelectric energy, but solar energy as well. There is a bridge rectified input for piezo elements (PZ1 and PZ2) and a direct input (VIN) for DC sources. Both are clamped to 20V. In addition, the board can simply be used as a standalone nanopower buck regulator.
An ultralow quiescent current undervoltage lockout (UVLO) mode with a wide hysteresis window allows charge to accumulate on an input capacitor until the buck converter can efficiently transfer a portion of the stored charge to the output. In regulation, the LTC3588 enters a sleep state in which both input and output quiescent currents are minimal. The buck converter turns on and off as needed to maintain regulation.
Four output voltages (1.8V, 2.5V, 3.3V and 3.6V) are pin selectable with up to 100mA of continuous output current and comes pre-configured for an output of 3.3V. However, the output capacitor may be sized to service a higher output current burst. An input protective shunt set at 20V enables greater energy storage for a given amount of input capacitance.
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該接口板採用LTC3588壓電式能量收集器從線性技術。此板不僅可以用於採集壓電能量,但太陽能使用為好。有對壓電元件(PZ1和PZ2)和一個直接輸入(VIN)為直流源的橋式整流的輸入。兩者都箝位在20V。此外,該主板可以簡單地作為一個獨立的毫微功率降壓穩壓器。
具有寬滯後窗口的超低靜態電流欠壓鎖定(UVLO)模式允許電荷積聚在輸入電容器直到降壓轉換器可存儲的電荷的一部分有效地傳遞到輸出。在調節,LTC3588進入其中輸入和輸出靜態電流是最小的休眠狀態。降壓型轉換器接通,並根據需要調節保持關閉。
四個輸出電壓(1.8V,2.5V,3.3V和3.6V)引腳可選擇最多的連續輸出電流和100mA的預配置為3.3V輸出。然而,輸出電容器的尺寸可以提供服務更高的輸出電流突發。輸入保護分流設定在20V使輸入電容的一個給定的量更大的能量存儲。
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