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Thermal Energy Harvesting power supply w/ LTC3108 and supercapacitor storage- Thermoelectric Collector

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Thermal Energy Harvesting power supply w/ LTC3108 and supercapacitor storage- Thermoelectric Collector Power Converters

Thermal Energy Harvesting power supply w/ LTC3108 and supercapacitor storage- Thermoelectric Collector,Power Converters,Garage & Shop,Garage & Shop,Tools & Equipment Power Converters


Operation
The DC/DC converter uses a small transformer to create an ultra low input voltage step-up. It is ideally suited for low power wireless sensors and other applications in which surplus energy harvesting is used to generate system power because traditional battery power is inconvenient or impractical. The LTC30 manages the charging and regulation of multiple outputs in a system in which the average power draw is very low, but there may be periodic pulses of higher load current required. This is typical of wireless sensor applications, where the quiescent power draw is extremely low most of the time, except for transmit bursts when circuitry is powered up to make measurements and transmit data. The converter can also be used to trickle charge a standard capacitor, super capacitor or rechargeable battery, using energy harvested from a Peltier element. A storage capacitor provides power when the input voltage source is unavailable.
This converter has three power outputs:
. A LDO voltage regulator with fixed 2.2V output
2. Vout with selectable voltage and
3. Vout2 which follows Vout in terms of voltage level

Output voltage level is selected on the two solder jumpers, where the following combination is used:
3 Vout = V
Vout = .V
2 3 Vout = 3.3V
2 Vout = 2.3V


In the above example, images, the selected Vout is . volts.

There are also two control signals:

. PGood indicator signals the host micro-controller that the main output voltage is within regulation.

2. Vout2_en is an input to the converter which is used to turn on the Vout2 output.

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