High Power Energy Harvesting Circuits

[rahdirs]

Hi all,

I am trying to find a circuit that provides energy harvesting for high power applications.The voltages would be in the range of 10-12 V and currents in the range of 12-15 A.

The IC LT 3652 allows harvesting for voltages upto 32 V but provides an output current of only 2 A.Are there any circuits that bring out 10 A ???
Below is an attached image from data-sheet of LT 3652,if the IC cannot charge battery when Solar voltage drops below 12 V,why is it called an Energy Harvesting Circuit.

 

[chuckey]

its a solar panel power manager chip, not a energy harvester (what ever that is?)
Frank

 

[rahdirs]

@chuckey: Yes,it has many options for monitoring battery voltage,charging current etc....it definitely manages power,but it was included among Energy Harvesting chips in Linear Technology website.
Are,there any other chips that do Energy Harvesting at High Power

 

[FvM]

Not everything in power electronics can (or must) be done with a single IC.

 

[amitjagtap]

You are using LT 3652 which gives 2A output current..... You want more output current.....
so..you can use multiple ICs in parallel to get 10-12 Amps....Put 5 such ICs in parallel to get 10A of current...(2Ax5=10A)...
For this...Check following application note form LT...

 

[rahdirs]

@FvM: can suggest some way to do high power energy harvesting or for a way to charge a 12 v battery when panel voltage drops below 12 v

 

[FvM]

You might consider a boost respectively a buck-boost converter. But depending on the solar panel characteristic, it's possibly useless. The operation point of a solar charger would be controller by MPPT. If the solar panel voltage is selected for buck operation with higher intensity, the output currents for voltages below 14 V is most likely so low, that you can stop charging without losing much energy.