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Charger
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  • Forum Post: Chargers for BQ78PL114

    Brian 14893
    Hi There, I am wondering what people are using to charge cells when using the BQ78PL114. Looking at the charging chips on the TI website, the only one that I see that uses the SMBus is the BQ24745. This however, is only good for up to 4 Li+ cells in series. Are there any suggestions if I am looking...
    on Sep 9, 2009

  • Forum Post: Using bq2954 for 5-cell Li-Po charger

    Vasily Shestakov
    Can I use this chip for 5-cell charger? I have some doubts about it because there isn`t exact information in datasheet.
    on Oct 16, 2009

  • Forum Post: Re: charging 6 LI-POs

    Eobin George
    Hey there.... I am looking for the same thing..I am lookin for a Charging circuit not a single chip solution but something like that ......I want a circuit/chip which can be used to build a charging system where you can just plug it in and then input the voltage...
    on Jan 7, 2010

  • Forum Post: Is there any solution for 2-Cells Li-Ion charging and PowerPump?

    Artem47286
    I love the idea of PowerPump, and looked for a components providing it. BQ76PL102 looks very nice, but I couldn't figure out - can it be used separately from BQ78PL114 controller, if I need only two cells? Also I didn't find any clues about how to charge battery in this case. Maybe there...
    on Apr 8, 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: Re: UC3906 - Charge state doesn't always 'wake up' in the same mode every time it's connected to the battery

    Tom Hammond
    Hi John: I'm note certain if I've replied to your note or not... I've managed to kinds lose track of those to whom I've replied... sorry. I agree that it's not difficult to cause the UC3906 to 'false' into an inappropriate state. And trying to connect a battery to the...
    on Jun 1, 2010

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

    Tom Hammond
    Greetings: I have a working UC3906 (2A) charger circuit which I'm 'kitting' for the local Amateur Radio Club. However, the only (I think, only) problem I'm having is that the charger state (indicated by 3 LEDs, PWR / OVCHG / FLOAT) does not appear to 'wake up' in a repeatable...
    on Apr 7, 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: bq24745 SMbus charger shuts down early

    Jack Peacock
    My setup is a bq24745 charger (TI EVM kit), a bq20z65 pack manager (TI kit), four Tekocell 9500MaH cells in series, and a TPS54383 buck regulator (TI kit) on the ouput stage. Using the EVM2300 I calibrated and configured the bq20z65 for the 4 cell pack, works fine, readings match meters. While in the...
    on Jun 15, 2010

  • Forum Post: Smart Battery System Help

    Scott Robinson
    Hello, I am currently putting together my first smart battery system for a linux machine and am having trouble properly recognizing whether my battery is charging or discharging. My goal is to have my program recognize the battery status and alert the user if the device becomes unplugged. My smart battery...
    on Jul 27, 2010

  • Forum Post: Re: be24610EVKit

    Charles Pakbaz
    Thanks for the reply Wang That helped. I added a 10k resistor to TS-GND and i got 12.1v on the BAT (with R25=490 this was expected voltage) but when I connected the 12v lead acid battery which right now has only 9.5 volts, the Vbat on the charger kit drops from 12.1 to 10.4 volts. Is that a correct...
    on Aug 27, 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: BQ2000 charging questions

    Terry Jendon
    I have a customer looking to use the BQ2000, in a new audio product. This product will be powered by 2 AA batteries. They had a couple questions: 1) Can I use the BQ2000 to charge both batteries in series? I assume I simply need to use a resistor divider and connect half the overall battery voltage...
    on Oct 26, 2010

  • Forum Post: bq24705, near 100% duty cycle

    Mike Wilson
    Hello! I am having problems with the bq24705 charger. My circuit uses the same components as figure 3 in SLUS779B, except I am charging 4 Li-Ion cells. My input source is a desktop power supply. (Please visit the site to view this file) ETS180110U - 18V nominal, 1.1A current limited (actual...
    on Oct 19, 2010

  • Forum Post: bq24120 and output capacitance

    Piotr65441
    Hi, I am thinking of adding BQ24120 to my design on the target board. The problem is that I am also using TPS63020 to power the whole board with ca. 200uF input capacitance which is directly connected to the battery. Therefore the charger would see this capacitance on its output (the board on/off...
    on Jan 28, 2011

  • 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: BQ24104 Stuck in Temp Fault Mode

    Jason Struble
    I currently have a design using the BQ24104 IC. The problem is that if the battery back goes to an over temp during the charge (or pre-charge phase) it indicates by flashing the STAT1. But if the user removes the battery from the charger (as most would because it has faulted out), the charger continues...
    on Apr 25, 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: "Non-host control" SMBus Charger System (w/ bq20z65-R1)

    Wang5577
    An application note may help you: http://www.ti.com/litv/pdf/slua533 To summarize, you can use a standalone charger with a gas gauge
    on Jun 9, 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: Charger IC for 3 cell Li-Po battery pack with BQ78LP116 gas gauge

    Igor Slobodnik
    Would you please to recommend, which charger IC I can use in order to charge the battery pack built with BQ78PL116 gas gauge chip? I do not want to use any microcontrollers, so the best is direct communication via SMB Bus.
    on Jun 27, 2011

  • Forum Post: bq24620 charger for 5 cell LI-poly batteries

    swapnil katre
    i have used the application note of bq24620 and built the pcb for charger. Charger is for VIN=28V, BAT=5-cell Li-Phosphate, Icharge=4A, Ipre-charge=0.125A, Iterm=0.3A. i have started testing the circuit and observed the STAT and PG led are Glowing, without connecting the Batteries to it. According...
    on Jul 16, 2011

  • Forum Post: BQ24080 CE# pin question

    Kezhou Guan
    On datasheet (P.13) it states that a low-level signal on Charge-Enabled Input pin enables the charging, but on the typical application circuit from the same datasheet (P.17), the CE# pin is held high constantly. Is this an error on the datasheet, or am I misunderstanding the datasheet? Could someone...
    on Aug 15, 2011

  • Forum Post: BQ24600 Thermistor calculations

    Neil Moore
    Hi, I am using a BQ24600 device to charge Li-ion battery. However, when I do the calculations for the thermistor that is fitted to the pack, I get negative resistances for one or other of RT1 and RT2. The thermistor in question has a cold resistance of 25.3k and a hot resistance of 5.3k. The calculations...
    on Sep 26, 2011
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