產品說明1
Energy Harvester - LTC3588 Breakout (BOB-09946)
Description:
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. 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.
Features:
- 950nA Input Quiescent Current (Output in Regulation – No Load)
- 450nA Input Quiescent Current in UVLO
- 2.7V to 20V Input Operating Range
- Integrated Low-Loss Full-Wave Bridge Rectifier Up to 100mA of Output Current
- Selectable Output Voltages of 1.8V, 2.5V, 3.3V, 3.6V
- High Efficiency Integrated Hysteretic Buck DC/DC
- Input Protective Shunt – Up to 25mA Pull-Down at VIN ≥ 20V
- Wide Input Undervoltage Lockout (UVLO) Range
Documents:
- Schematic
- Eagle Files
- LTC3588 Product Page
產品簡介
這款小模組使用Linear Technology公司的LTC3588壓電能量收集器。這款小模組不僅能收集壓電能量，也能收集太陽能。其中有一條電橋，能夠把輸入變為壓電元件（PZ1和PZ2），能夠將直接輸入（VIN）變為直流源。這兩個電橋的電流都在20伏以內。另外，這款板能作為降壓調節器單獨使用。
它擁有一個超低靜態電流欠壓鎖定模式，其中有一個大洩磁窗，能夠收集輸入電容器的電荷，而降壓調節器則能將其積累的電量抽調出去。通常來說，LTC3588進入睡眠狀態時，輸入和輸出的靜態電流都很小。降壓調節器則會自動啟用來保證其正常運行。
接口能選擇性接入四種輸出電壓（1.8V，2.5V，3.3V和3.6V），其輸出電流為100mA的恆定電流。然而，輸出電容器可能會突然釋放出更高的電流。因此，我們設置了一個20伏的輸入防護分路器，它能讓已有的輸入電容器存儲更多電荷。
技術規格
- 950nA靜態輸入電流（輸出電流——通常空載）
- 450nA靜態輸入電流（欠壓鎖定模式）
- 2.7V-20V輸入運行範圍
- 集成低損耗全波整段電橋，輸出電流高達100mA
- 輸出電壓可選擇，為1.8V，2.5V，3.3V和3.6V
- 高效率集成滯後降壓直流/直流
- 輸入保護支流-達到25mA的反偏電流，輸入電壓為20V
- 欠壓鎖定範圍廣
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