Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

LTC3108 (energy harvesting and power management) circuit help

Status
Not open for further replies.

jeromekang

Junior Member level 3
Junior Member level 3
Joined
Jul 21, 2010
Messages
30
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,286
Location
Philippines
Activity points
1,490
So i am making a circuit wherein I need to power a keyboard, which is using a single AAA NiMH rechargeable battery, and be able to store also in a large capacitor (0.1F used in my setup don't know yet what is the most suitable capacity) for maybe prolonging the onboard battery. I used the LTC3108 in my search of a good energy harvesting and management solution.

Assuming that I can generate around 3v DC that serves as the input, can I charge the AAA battery? I can't really confirm it because after doing my data in the picture below, I tried using the battery as the load of Vout (1.2v 1100mAh Akari rechargeable) and the Vout drops to the same voltage as the battery (1.2?? V). I'm guessing that is because a lack of a directional diode?

Also, when the battery is attached to Vout, the large capacitor is not charging.

Can you help me with this circuit? Thanks.

**broken link removed**
 

You need a charger IC or LDO between 3v DC and the battery.
 

Hi leo_o2!

What do you mean? There is a VLDO pin for LTC3108, can that be used? it's a constant 2.208v for the LTC3108 though
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top