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BQ2031
Related Posts

  • Forum Post: Re: MPPT-Based Lead Acid Charger Using bq2031

    Chris Glaser
    The circuit in the app note is simply the EVM for this IC: http://focus.ti.com/lit/ug/sluu023b/sluu023b.pdf Please read the user's guide and the datasheet http://focus.ti.com/lit/ds/symlink/bq2031.pdf and see if they answer your questions.
    on Jan 5, 2010

  • Forum Post: Re: MPPT-Based Lead Acid Charger Using bq2031

    balaji murugan38578
    Hi Chris, Thanks for your suggestions. I got answer for my 3rd question. but first two questions i didn't get the answer. In that datasheet, there is no comparision between algorithm vise and more ever they didn't specify the selection criteria for the algorithm. I am still confused...
    on Jan 6, 2010

  • Forum Post: Re: MPPT-Based Lead Acid Charger Using bq2031

    balaji murugan38578
    Hi, My battery having 6 cells. So now i am able to select RB1 value. Thank you very much.... You really helped to understand the basic prinpciple of lead acid battery charging methods or algorithms. I will start build this circuit very soon. if i face any problem , i will come back to you. ...
    on Jan 7, 2010

  • Forum Post: Re: Just another newbie question

    David Albert38351
    I am considering the bq2031 for an SLA charger for use in a standby power application. The device will be used outdoors so temperature-related behavior is important. The datasheet indicates operating temperature (Topr) of -20 to +70C and "Temperature Under Bias" (Tbias) as -40 to +85C. My...
    on Jan 14, 2010

  • Forum Post: Maximum Current on BQ2031

    erylone
    Hi, Is the maximum current of the BQ2031 limited only by the chosen switch's (transistor I presume) capability? Is there a typical application schematic available? I didn't see one in the data sheet. Thanks, James
    on Jun 15, 2010

  • Forum Post: Re: Maximum Current on BQ2031

    Chris Glaser
    Yes, the bq2031 is a controller, so the maximum charge current will be limited by the power stage. There are several application notes and evaluation modules on the product page that show the IC is a typical application.
    on Jun 16, 2010

  • Forum Post: Using the BQ2031 as both an SLA charger and a DC power source

    erylone
    Hello everybody, Is there a battery charging IC that will power a circuit with a current range of 40mA to 3A, while maintaining a charge on a 12V - 13Ah SLA? I looked at the BQ2031, but it looks like the Imax which must be at least 3A in this case, will limit the low-end current (Icond...
    on Jun 16, 2010

  • Wiki Page: Solar powered battery charger using the BQ24030

    Jared Casey
    Q: Solar powered battery charger using the BQ24030 by 1030107 Dear all, Thanks you for taking the time to read my post. Though similar topics exist on a solar powered battery charger, I would like to start my own; as I have some specific questions to ask and some measurements I would...
    on Jul 12, 2010

  • Forum Post: Re: bq2031 inductor selection

    Chris Glaser
    The DC resistance simply affects the efficiency of the charger and is arbitrary. Usually, there are size constraints for the charger system which limits the DCR to some level. A lower DCR will give a more efficicient charger.
    on Aug 3, 2010

  • Forum Post: Re: Selectable battery charger for 12V and 24V batteries!

    Chris Glaser
    Yes, either the bq2031 or bq24450 will work. Each IC's charge voltage can be adjusted with a resistor divider, so you could simply change the divider with a jumper to charge the different cell count. The bq24450 is a linear controller, while the bq2031 is a switching controller.
    on Oct 21, 2010

  • Forum Post: Re: Lead Acid 12V 12 Ah battery charger, float charge.

    Chris Glaser
    You will need to first boost the super cap voltage to be above the maximum battery voltage that you want. For this, the TPS61175 will work or the TPS61170 for lower charge currents. After you have boosted the voltage, the bq2031 or bq24450 should be used to charge the batteries. The bq24450 will be...
    on Nov 23, 2010

  • Forum Post: DV2031S2 - D6A, D6B, D7A, D7B on the schematic

    Saleem Banatwala
    I would like to build the circuit on page 5 of the DV2031S2 user manual: http://focus.ti.com/lit/ug/sluu023b/sluu023b.pdf I am confused regarding the footnote at the bottom of the schematic that says "see application note for additional details". It seems to be referring to diode D6B and...
    on Apr 1, 2011

  • Forum Post: 12volts/15amps battery charger using uc3909 or bq2031

    sekar pandurangan
    please provide cicuit diagram for 12volts/15 amps VRLA battery charger using uc 3909 or bq2031 regards p.sekar comsystems
    on Apr 20, 2011

  • Forum Post: Re: help bq2031 (problem with charging current )

    Chris Glaser
    I am unable to open your files. Can you post a pdf of the schematic? How are you measuring the current? What is the battery voltage at the different currents? Is it at the maximum voltage? Have you confirmed that your input power supply to the bq2031 is not limiting? What is your input voltage and...
    on May 17, 2011

  • Forum Post: Re: help bq2031 (problem with charging current )

    Chris Glaser
    First, you need to measure the charging current with a current meter. There are tolerances in the resistor and 250 mV voltage that will affect the real current flowing to the battery. Also, you would need to measure precisely across just the sense resistor so as to not pick up any other voltage drop...
    on May 18, 2011

  • Wiki Page: 12volts/15amps battery charger using uc3909 or bq2031

    Charles Mauney
    Q: 12volts/15amps battery charger using uc3909 or bq2031 Do you have a high current application note using uc 3909 or bq2031 A) We do not currently have any design for high power lead acid chargers. The bq2031 design may be used if the power stage components are replaced with the appropreate...
    on Jul 28, 2011

  • Wiki Page: DV2031S2 - D6A, D6B, D7A, D7B on the schematic

    Charles Mauney
    Q: DV2031S2 - D6A, D6B, D7A, D7B on the schematic I would like to build the circuit on page 5 of the DV2031S2 user manual: http://focus.ti.com/lit/ug/sluu023b/sluu023b.pdf Where is the application note that is referenced? It seems to be referring to diode D6B and D7A. I am assuming that D6A...
    on Jul 28, 2011

  • Forum Post: BQ2031 : Rv , Cv calculation ?

    Nikola Popovic
    Hi , I would like to use BQ2031 in charger application , battery is sealed lead acid, 24V , capacity 18Ah , Imax =2.2A, charge algorithm is two step voltage. As switching components , I will use IRFP250N MOS , and IR2110 MOS driver. All in All , it's not very complicated design , but...
    on Nov 23, 2011

  • Forum Post: Re: BQ2031: Output Capacitor and LEDs Status Questions

    Chris Glaser
    If this is a new design, I would recommend looking at using a newer IC, such as the bq246xx family with this app note: http://www.ti.com/lit/an/slva437a/slva437a.pdf Additionally, with such a low charge current, you might look into the bq24450 linear charger. It would be a simpler design and there...
    on Jan 26, 2012

  • Forum Post: SLA charger and gas gauge IC combo

    TIM FOSTER
    I am working on a new design that will incorporate a battery backup, similar to a UPS. The battery that we will use will either be a 12V 100Ah or 12V 1Ah SLA (system is configurable at time of purchase to have one or the other). I have been looking through the forums and through the technical literature...
    on Feb 22, 2012

  • Forum Post: BQ2031 LED2 blinks in MODE 1

    Jeferson Staudt
    In Mode 1 what mean when the LED2 are flashing? According with the the table in page 4 of the IC datasheet this is a undocumented status
    on Mar 29, 2012

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