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Battery Chargers
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  • Forum Post: Solar Battery Charger with MPPT :BQ24650EVM-639

    Sham Sundar
    Hi, I like to manufacture Solar Strret Lights . I am looking for Battery Chargers using MPPT and i came across BQ24650EVM-639 . It would great help if you can provide me the Design files(Gerber and BOM) for the above said circuit. Regards, Sham
    on Oct 24, 2010

  • Forum Post: Re: I want to know simple Ni-MH battery charger solution.

    Hyun Woo Lee
    Thanks Chris. I can understand more clearly in Battery charger. Now I'll test with DV2002L2 EVM. I have one question. As I know TS pin is sensing the battery temperature. If TS pin is lower than Vtco(0.5*Vcc), the charger will occur termination. Right? But as shown DV2002L2/TL2...
    on Nov 23, 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: 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: Battery charging problem

    Michael Day
    All Texas Instruments battery charger ICs have built in protection circuitry to protect against over and under charge conditions that could damage the battery. The TI web page provides a good selection tool to help narrow down your battery charger IC. http://focus.ti.com/paramsearch/docs/parametricsearch...
    on Jan 12, 2011

  • Forum Post: Re: SLA Charger

    Tariq Ahmad
    Charles, thanks for your reply. Here's my problem: Raymond Mack in Marty Brown's book, "Power Sources & Supplies, World Class Designs, describes a charger ckt with the UC3906 charging 3 12V lead acid batteries in series. He is using a PNP Darlington pair in the charge path, with the...
    on Apr 28, 2011

  • Forum Post: SLA Charger

    Tariq Ahmad
    I am designing a charger for 3 12V SLAs in series, a 36V system. The input voltage is 50V (nominal). The UC3906 has a Vin absolute max limit of 40V. Which part do you recommend for new designs? Thanks.
    on Apr 27, 2011

  • Forum Post: NTC resistor for BQ24401

    Joe Lee
    Hi, As BQ24401 is selected to use, may I have a suggestion about the NTC thermistor for TS described in datasheet? Br, Joe
    on May 21, 2011

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

    Arjun Pal76376
    hello chris, I have made the battery charger controller for a max 2 A current and i am using PWM charging algorithm in it. my pv panel has rating V(operation)=16V ,Isc(Short circuit current)=1.7 A 1-My first doubt is how i should go for efficiency calculation. what i did ,i took a variable load...
    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: BQ24753A - no end of charging

    Frank Thomas
    Hey guys, I'm currently testing the BQ24753A. While I was charging my LiPo battery (2 cells @ 8.34V, 5000mAh) I noticed that there is no charge cut off when the current is dropping below a certain value. I don't know the exact current limit for my battery but it is recommended as far as...
    on Jun 30, 2011

  • Forum Post: bq2002 charging 4 NiMH cells with 5V source?

    Fabio Verna
    Hello, I have 4x 1.2V NiMh cells that need to be charged from a 4.7V-5V source (0.5A). Here is what I've learned so far by reading the doc and application notes on this website: I need a fast charge controller Charge termination can be detected with PVD (dT/dt is better but requires an...
    on Jul 20, 2011

  • Forum Post: Re: Power Good is blinking on BQ24600

    Pietro Cipriano
    Input Voltage: 23.8V, generated by an standard of the shelf ACDC. Vbattery with no load: 18.5V (we also got same effect with a battery pack of 17.8V). My old tools are not eligible to import some plots however: Both PG and CE have two 47K of pull up resistors connected to 3.3V (otherwise of...
    on Jul 22, 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: BQ24170; minimum adaptor voltage for 3 cell charging

    JUNGO WU
    Hello all When use BQ24170 for 3-cell li-polima 12.6v, typical application use adapter 15V input. Is it possible to use 13.2V 0.9a adapter input? or minimize adapter V input? Thank you Jungo
    on Aug 25, 2011

  • Forum Post: Re: BQ24610 issues

    Jayakrishnan V
    Hi Tahar: Thanks for the support - I am still doing the testing. I have two boards - both boards same, charging happens in one board, and in anothr nothing happens. In that non-working board BTST output is just 5volts even before battery is placed. In the working board, this is about 12V. ...
    on Sep 29, 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

  • Forum Post: BQ24610 issues

    Jayakrishnan V
    I have designed a board with BQ24610 and currently testing it. I need to use this for a 3V battery pack charging. I give a 13.5V adapater, I set VISET1 and VISET2 as 0.21V, TS pin measures 1.4V. In the first board I tested I was able to get the charging started. In the second board, with the same...
    on Sep 23, 2011

  • Forum Post: BQ2057T - How to charge 7.2 battery by using BQ2057T?

    Surya70007
    Hello , I would like know is it possible to charge 7.2v (two 3.6 volt cells) by using BQ2057T? if possible how to design the voltage divider circuit for 7.2V. Thanks in advance
    on Oct 21, 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: What ICs are there that allow charging of a 3-cell Li-Ion Device

    Yusiang Leong91190
    Are there any ICs from TI / National that allow charging of 3 Li-ion cells? I am unable to find any. I am quite new at this, so i would like to find a no-frills 3-cell Li-Ion charger that requires Minimum components. Thanks for any replies!
    on Dec 20, 2011

  • Forum Post: About BQ24725 I2C Communication dose not work at Battery Operation

    March Jasper
    Hi About BQ24725 Charger device, we controlled by I2C Bus. But we change to Battery operation , I2C Bus line dose not work, And we tested for something and found this one. 1) Voltage 0V supply to ACDET Pin when bq24725 Battery operation => We can not connect I2C Bus and we can not data...
    on Dec 22, 2011

  • Forum Post: Re: BQ2000 MTO clock frequency vs actual time out

    Dave White
    Hi Tahar, Thanks for that, no there is not a load connected - just the battery. I am aware of the C/2 suggestion, unfortunately this unit contains 10 chargers - so there are issues with the total current becoming excessive. Not sure if I can make one channel to say 3A just to try it or not with...
    on Jan 26, 2012

  • Forum Post: Battery Charger IC with OTG/500 mA output current, other than BQ24140

    Anil k S
    Hi, My application needs Charging from a USB power supply + OTG Support with 500 mA. Found BQ24140 can do that and selected that. Now finding it difficult to do the layout/manufacture this board since BQ24140 comes with only package - 30 DSBGA and needs "6 mil via on pad" and it is very...
    on Jan 20, 2012

  • Forum Post: BQ24103 My Battery is not charging

    Binoy Johnson94822
    Hai My BQ24103 battery charging circuit is not working properly. In this circuit battery is not charging please give a solution as immediate as possible Now I am attaching my circuit Regards Binoy Johnson (Please visit the site to view this file)
    on Jan 27, 2012
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