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Related Posts

  • Forum Post: Re: TPS61200 Solar LiPo charger questions

    MCV
    nanobot9000: Mike I understand the need to monitor the input current levels but what I cannot seem to find is the minimum current required to start-up and then maintain operation. Below is an example how to ensure that the input current does not exceed the cell capacity. The idea is to monitor...
    on Apr 27, 2009

  • Forum Post: Charging a Super Capacitor

    R4D4
    I would like some information on using battery management IC's to charge a supercapacitor and power a small load for a solar panel, while keeping the solar panel output near its maximum power point. The load has a minimum operating voltage and any power available from the solar panel and not required...
    on Sep 8, 2009

  • Forum Post: Charger and current divide.

    Cebrail Haluk Gorgulu
    Hello friends i hope you are having great weekend. i wonder that i m working on Liquid filling system using solar energy. but i wonder that i also using peltier in this system. and also using graphic lcd etc... as i know peltier work on 1A /12 V other system Working on 5V /500 mA and i m...
    on Jan 8, 2011

  • Forum Post: Re: Please help to select a charging management IC for 3pcs super capacitor in parallel

    Michael Day
    You might consider the TPS61200.
    on Apr 21, 2011

  • Forum Post: Re: fuel gauge for upto 110 AH Lead acid battery

    Daniel Friel
    Check out the bq78412 Pb-Acid Battery State-of-Charge Indicator With Run-Time Display http://focus.ti.com/docs/prod/folders/print/bq78412.html
    on May 2, 2011

  • Forum Post: Re: solar charger

    Tony Garvey
    Hi Chris Thanks for the advice, I spent last night learning and modelling in TINA-TI. It's a nice tool and I've managed to learn enough about its capabilities to allow me to understand more how the TPS61200 MPP regulator operates. In the absence of a macro model for the TPS61200, I've...
    on Jun 1, 2011

  • Forum Post: Re: GPRS module powered by Li-Ion battery, charged by solar panel: bq2403x or bq24650?

    Michael Day
    I suggest considering the bq24210 solar powered battery charger IC. It will be the most efficiency solution because it will pull the maximum current available from the solar cell to charge the Li-Ion battery. This configuration drives the load from the battery, so you will not need an additional buck...
    on Jun 10, 2011

  • Forum Post: GPRS module powered by Li-Ion battery, charged by solar panel: bq2403x or bq24650?

    Christian Obkircher
    Hello, I need to power a GPRS module which accepts an input voltage from 3.4 up to 4.8 V - it is mainly designed to be powered from a Li-Ion battery. My solar panel delivers 330 mA at 6 V. My first approach was to follow the slua394 App Note. The problem is, MPP Tracking won't work if...
    on Jun 10, 2011

  • Forum Post: Re: BQ24650 Spreadsheet error

    Michael Day
    I read the numbers in your picture as 20, 0.529, 0.631, -0.002, 100, 4456, 20, 80, 5 and entered them into the spreadsheet. The spreadsheet recommends Rp=9.18k, Rs=305k, Rb=40k. I am using Microsoft Office Excel 2003. What version are you using? Texas Instruments provides a bq24650 Evaluation...
    on Oct 18, 2011

  • Forum Post: Battery Charging 2cell LiPo from Solar Cell

    Agatha Oliveira97187
    Hello, I am sorry if this question seems basic since I am just getting started on this. I am trying to build a circuit to charge a 1300 mAh 7.4V 2cell LiPo battery. I was wondering which parts you would recommend to do the charge management of the battery. I was looking up some parts and I was...
    on Feb 17, 2012

  • Forum Post: Re: bq24210 with low current solar cell

    Michael Day
    The bq24210 will not work with an input source that is only capable of 4mA. Although the bq24210 quiescent current is only 800uA when charging, the minimum recommended charge current is 50mA. Please consider the bq25504. It is considered an "energy harvesting" IC that is designed to operate...
    on Mar 21, 2012

  • Forum Post: Re: bq25504 is suitable for my application?

    Michael Day
    You can use the bq24210 with a lower charge current than 50mA, but the charge current tolerance gets much larger at low charge currents. If you do not need extremely accurate charge currents, you can use the bq24210 to charge with less than 50mA. The datasheet provides the charge current tolerance across...
    on Apr 20, 2012

  • Forum Post: What resistor values I need to select for using solar cell with BQ25504 highly efficient boost charger IC?

    AWJJ Jongh
    We want to use a 2.0V 45mA Solar Cell shown here: http://www.futurlec.com/Solar_Cell.shtml Part Code: SZGD3131 with size 31mm x 31mm x 3.0mm (LxWxD) and features: Polycrystalline Blue Solar Cell Efficiency: 16.5% Peak Voltage (Vmp): 1.92V Open Circuit Voltage (Voc): 2.2V Peak Current (Imp): 45mA Short...
    on Apr 15, 2013

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