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参数资料
| 型号： | V20W |
| 厂商： | Mide Technology Corporation |
| 文件页数： | 22/24页 |
| 文件大小： | 0K |
| 描述： | PIEZOELECTRIC ENERGY HARVESTER |
| 产品培训模块： | Volture EHE004 Piezoelectric Energy Harvesting Conditioning Circuit |
| 产品目录绘图： | Volture Series Sensors Side |
| 标准包装： | 1 |
| 系列： | Volture™ |
| 传感器类型： | 加速 |
| 传感范围： | 75Hz ~ 175Hz |
| 输出类型： | 模拟 |
| 工作温度： | -40°C ~ 90°C |
| 特点： | 压电式振动能量收集，全密闭式密封 |
| 封装/外壳： | 悬臂压电薄膜（晶片） |
| 安装类型： | 通孔 |
| 端子： | PC 引脚 |
| 相关产品： | VR001-ND - VIBRATION DATA LOGGER |
APPLICATIONS INFORMATION - LOAD ISOLATION EXAMPLE
as the comparator will be ON when approaching this
point. Solving for R3,
Latch-Up Consideration
If diode D8 is removed, the designer must pay attention
R3
R1 R2 VL Vth
R1 Vth R2 Vth R2 VL
to D6, which is necessary to prevent latch-up of the
LT1474’s output switch if the voltage at its SW pin is
held up while V IN drops. This situation may easily
The addition of R3 will slightly affect the actual center
voltage; however, this change will typically not be
significant in comparison with the size of the hysteresis
band. For a typical V c (>3.3V), the final value of V c will
be lowered. As indicated by Figure 5, however, driving
the piezo to moderately higher open-circuit voltages
than optimal does not have an excessive impact on
efficiency.
Check: Actual V h and V l
Once all resistor values are chosen, the actual upper
and lower trip points will be defined by:
occur in an application where the load is powered by
multiple sources or includes a storage element, such
as supercapacitor or battery, whose voltage drops
more slowly than that of C1 when no harvested power
is available. The user must then choose D6 so that the
voltage at SW cannot exceed the voltage at V IN by the
0.6V required for latch-up. Particularly at high C1
voltages, the designer must also take steps to ensure
that reverse leakage over D6 will not allow the voltages
at the V FB and SW pins to float above their maximum
ratings at no load.
V h 1.182
V l 1.182
R2 R3 R1
R2 R3
R1 R3 R2
R2
REVISION N0. 002
REVISION DATE: 01-23-2013
22
相关PDF资料 |
PDF描述 |
|---|---|
| V21BL | PIEZOELECTRIC ENERGY HARVESTER |
| V21B | PIEZOELECTRIC ENERGY HARVESTER |
| V22B | PIEZOELECTRIC ENERGY HARVESTER |
| V22BL | PIEZOELECTRIC ENERGY HARVESTER |
| NTMFS4899NFT1G | MOSFET N-CH 30V SO-8FL |
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