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Battery Management

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Related Posts

  • Forum Post: BQ24074 Li-ion charger WHISTLES (!) when powered from solar panel

    bbalintHUN
    Hi everyone! I built a Li-ion charger circuit with bq24074 and I want to power it from a low power (~max 300mW) solar panel. The current limit for the IC input is 100 mA, the solar panel can't source this, so the voltage of the panel is around the minimum input voltage of the IC and it turns on...
    on Nov 24, 2009

  • Forum Post: UC3906 vs. BQ24450

    David Albert38351
    The UC3096 and BQ24450 appear to be very similar (and pin-compatible). What is the difference between them and which is recommended for new applications?
    on Jan 4, 2010

  • Forum Post: Can I use darlington-PNP (like TIP127) as my pass element with UC3906?

    Bhavesh Gupta
    Hi there, I'm designing a battery charger using UC3906. I want to charge two 12V batteries in series (24V) of 4.5AH. The Imax (Max charging current) would be 900mA. Now, my question is: Can I use a darlington-PNP as my pass element? Like TIP127 with hfe of around 1000. Thanks in advance...
    on Jan 25, 2010

  • Forum Post: BQ24450 Single Level Float Charger

    Nathan Brizzee
    Hi there, I am evaluating the BQ24450 for an application that requires a single charging voltage. My battery is a 12V 12Ah SBSJ13 battery that requires a constant 2.27 volts per cell @25C (with temperature compensation). I plan on charging it at 1.5 amps with an input voltage of 14.75 V. My question...
    on Jan 27, 2010

  • Forum Post: need a help about backup battery bq24070

    lilly
    Hello! I'm looking for some circuit to monitor the state of battery pack. Tried to search from product list, but it seems a bit to many products and i failed looking for the right one, maybe I was looking in a wrong place. I need a <500ma and 3.3V battery.when power is ON the battery should...
    on Apr 21, 2010

  • Forum Post: Re: UC3906 - Charge state doesn't always 'wake up' in the same mode every time it's connected to the battery

    Tom Hammond
    Hi Adrien: UNfortunately, I received NO(!) responses to my plea for assistance with this problem. Not even a 'peep'. However, upon further checking, I have been able to satisfactorily reset the IC using an SPST switch to remove voltage from the UC3906 AND the pass transistor at the same time...
    on May 2, 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: 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

  • Forum Post: Need help building battery charger using bq2000

    awan2010
    Hi, I am building simple battery charger using bq2000 for my project and it is partly working. It is charging my lithium battery, but there are some features that are not functioning: * time out (MTO) does not work. I have flashing LED run indefinitely when there is no battery * When the battery...
    on Jul 6, 2010

  • Forum Post: Re: bq24103 vs bq24103A zener protection

    Joe Lee
    I have read the datasheet that is revisied in March 2010 (slus606o.odf), it still states that only BQ24103A and BQ24104 need no zener diode. I would like to the different between BQ24103a and BQ24103. And does zener diode need for BQ24103?
    on Jul 13, 2010

  • Forum Post: be24610EVKit

    Charles Pakbaz
    HI, I have purchased the bq24610EVKit and would like to also charge my 12v lead acid battery with this kit. I have connected the battery to J5 PGND, BAT) and have supplied the kit with DC power on J1 (PGND, ACPWR), but there is no activity on the battery am I missing something? all the jumpers...
    on Aug 25, 2010

  • Forum Post: bq24610EVKit Questions

    Charles Pakbaz
    I'm trying to use the bq24610evkit to charge a 12v lead acid 130AH battery. As recommended by TI, I added a 10k resistor to TS-GND and i got 12.1v on the V.BAT (with changing R25=490k) here are my questions: 1. If I'm using a 12V battery, is selection of R25 correct? 1. The battery...
    on Aug 30, 2010

  • Forum Post: Re: problem with BQ24081 charger

    hezi nistani
    Hi Chris, thanks for the reply, I added the 10K resistor and yet - no charge is done, but now I see that after I put VIN (5VDC) the charger current rise up to 800mA (that is the charging current I set with RSET(1K)) only for one sec and then gose down to 0mA - and on charge cycle begins. ...
    on Sep 2, 2010

  • Forum Post: BQ2002 - Fast charge not working

    Calum Mackinnon
    Hi, I have a customer with the following problem. "I designed a circuit (attached) using the BQ2002 to charge a very small battery pack, comprised of three 6 mAh NiMH coin cells (V6HR cells). The circuit runs off of 9-12VDC, which is regulated down to 5VDC to supply the BQ2002. The current...
    on Sep 11, 2010

  • Forum Post: BQ32000 RTC

    Itzik Mizrachi
    (1) At first power-up, the time registers have gibrish values in them, and the UBOOT (initial code that is running during boot) needs to have special code to update them before the Linux driver can even access it. Usually RTC is supposed to wake up with some initial value (that is not gibrish). ...
    on Sep 12, 2010

  • Forum Post: BQ32000 -external capacitors

    Itzik Mizrachi
    Does the crystal connected to the BQ32000 need external capacitors?
    on Sep 12, 2010

  • Forum Post: Re: Need Li-ion battery charger IC.....

    Chris Glaser
    Here is some training that discusses battery charging: http://focus.ti.com/docs/training/catalog/events/event.jhtml?sku=OLT410002 Basically, for a simple lithium ion chemistry, the cell is charged in a CC/CV method. It is charged at a constant current (usually 1 C, which is 1400 mA for your cell...
    on Nov 1, 2010

  • Forum Post: BQ24113A Host control charger current

    albert Liu
    (Please visit the site to view this file) The charge current can be setting by a resistor of Iset1 pin on BQ24113A, If I need to control the charge current by host in charging period , the idea is in the attachment file. but I don't know what is the side effect in this idea. please give...
    on Nov 4, 2010

  • Forum Post: bq24026 battery charger ic's system interface voltage level

    Anubhav Gupta
    dear TI, we at sumona consulting are developing a zig bee based USB dongle with battery backup.the battery charger ic selected is bq24026.the interface controller is cc2531zig bee SOC with 3.3V vcc.my query is what is the volatge level of the STAT1 and STAT2 pins.can we directly interface these pins...
    on Nov 24, 2010

  • Forum Post: selecting a charger

    Asef
    hi there, i'm planning to do some charge/discharge tests on rechargeable batteries of various chemistries. could i seek your advice on best option for a programmable charging chip/module that can produce the desired battery discharge/recharge profiles? thanks.
    on Dec 10, 2010

  • Forum Post: Battery charger using UCC 38500

    alain jeanneaux
    Hello, I need to design a battery charger (15.2V at 100A for lead acid) I choose the UCC38500 for PFC and SMPS. For regulation and monitoring battery cycle charge, I want to use the UC 3906 Due to the difficulty of calculating the components using the SLUS419C, I wrote a Excel calculation sheet...
    on Dec 20, 2010

  • Forum Post: Re: selecting a charger

    Asef
    thanks for the reply.
    on Jan 4, 2011

  • Forum Post: Re: Charger selection

    John Carpenter2
    1. Link for package data sheet http://focus.ti.com/lit/ml/mpss005/mpss005.pdf 4. If you tie EN low and the input falls below the battery, the part will go into load mode meaning the battery voltage is shunted to input, it should be fine with the diodes blocking it. But if you only want charger...
    on Feb 11, 2011

  • Forum Post: bq24092

    Matthew Chiu
    During battery charging, the bq24092, how maximum internal impedance of battery can be accepted?
    on Apr 18, 2011

  • Forum Post: NiMH usb battery charger

    David Forsyth
    I have a project with 4 NiMH AA batteries in a parallel use configuration. As far as I can see, they must be electrically separated for proper charging so I will need to set up a system for separately managing the charging for each battery. I wish to do this powered by a USB bus. I see a lot of choices...
    on Apr 19, 2011
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