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bq20z65
Related Posts

  • Forum Post: Re: 12 cell Li-Ion in a 3S-4P

    BatteryBorne
    Hello SB, your battery pack needs match perfectly up with our bq20z4x, bq20z6x, bq20z7x and bq20z9x familes. I would suggest looking at the bq20z45. it is our latest release, most accurate gas gauge and smallest footprint imedance track device. http://focus.ti.com/docs/prod/folders/print/bq20z45...
    on Dec 14, 2009

  • Forum Post: Re: fuel gauge for LiFePO4

    BatteryBorne
    You can use the bq3060, bq20z4x and bq20z6x devices with LiFePO4.
    on Apr 21, 2010

  • Forum Post: bq20z65 circuit design difficulties

    swapnil dadhe
    Hi, attached hereby is a compressed rar file, comprising of 4 images and i have the following doubts concernig the circuit design as referenced to those images : image name :-bq29330 : The pack- of bq29330 (ie SRN pin) is also connected to a "low power ground ". Is this the control ground...
    on May 22, 2010

  • Forum Post: SMbus connection for bq20z65

    swapnil dadhe
    Hi, This is in reference to the recommended circuit design for bq20z65. The reference design suggests two 100ohms resistances in series with the SMbus data and clock lines. However the SMbus 1.1 specifications suggest direct electrical connection between the host and the slave using two pullups to...
    on Jun 8, 2010

  • Forum Post: configuring and calibrating bq20z65 without API

    swapnil dadhe
    Hi, I have the following doubts regarding the calibration and configuration of the gauge : 1>Can the bq20z65 be calibrated without the bqeasy API and EV2300 using a microcontroller and SMbus communication ? 2>Also how can the learning process be started without the API ? 3>For the...
    on Jun 9, 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: BQ27510 Production Code

    Nick Moore
    I have written the firmware to program the BQ27510 from the three page flow chart from Going to Production with the bq2750x. However, every time I read register 0x66 to see if the data=0x00 I get the data to equal 0x37. Does anyone have any idea why this might be happening? I'm thinking maybe...
    on Jun 22, 2010

  • Forum Post: Re: bq20z65 fuel gauge cell no 4 reading 0V

    gerhard peter
    Doug, I forgot to mention one other problem. When I start BQeasy with the gauge attached and powered up I get the message, :"unrecognized device or bqeasy can not find the .encr file for the connected device. this file is needed to configure the dataflash." I can still proceed...
    on Jul 30, 2010

  • Forum Post: Re: bq20z65 fuel gauge cell no 4 reading 0V

    gerhard peter
    Jackie, As far as I remember only one of the two bits was green the other red. Unfortunately I can not double check because now I am getting an all gray readout even though the program (bqeasy) says "communication ok". I really need to get resolution to this problem and some direction...
    on Aug 3, 2010

  • Forum Post: bq20z65evm newbie question

    williamblandy
    Hi I have a BQ20Z65-EVM with the EV2300 adapter. I can program all the values and calibrate the gauge with bqEVSW. Im sure I overlook something very basic, but I can't the either CHG or DSG FET to turn on. Basically there's no voltage between PACK+ and PACK- Here is a screenshot from...
    on Aug 6, 2010

  • Forum Post: bq20z65 Eval Software - Error with bqEASY

    Brian Fritz
    I have loaded and installed the Evaluation Software for the bq20z65. I was able to simulate a pack connection, consisting of a supply with 1K resistors to the cell inputs, and I'm able to correctly read voltages temperatures, and currents. I next tried the bqEASY tab. When I finish item 2H...
    on Nov 30, 2010

  • Forum Post: Re: bq20z65 Eval Software - Error with bqEASY

    Brian Fritz
    Update: After looking over much of the forum, I came across a number of postings that suggest that many of the problems are because of SMBus communication issues. With this in mind I decided to shorten the cable between the EV2300 and the bq20z65EVM. This seems to fix the problem. The cable I was...
    on Nov 30, 2010

  • Forum Post: bq20z65EVM Datasheet - Error in Fig. 4

    Brian Fritz
    The bq20z65 evaluation module datasheet has an error in Fig. 4. There is no connection between the current sense resistor and the 1N terminal to the cells. The word document attached shows a picture of the PCB, where the connection to the sense resistor is visible, and note how this does not match the...
    on Dec 14, 2010

  • Forum Post: Re: Application bq20Zxx

    sam shen
    OK, I checked the data sheet of bq20z65, it is good soluion for my current appliaction. In reference design, I found the fuse and second protection chip BQ294xx, but I do not want to use these in my application, so I want to know whether it is reasonable and how accomplish it. Thanks
    on Jan 28, 2011

  • Forum Post: Re: Application bq20Zxx

    sam shen
    Hi Keith, Thank you for your response, so could you please provide a reference design of bq20z65 without fuse and second protection. BR Sam
    on Jan 28, 2011

  • Forum Post: GasGauge BQ20z65 (with BQ24617-Charger): Programming and more

    Uncle Tom
    Hello all. My design looks like this: Battery Pack 3s1p = 3 cells in series of approx 900-1400mAh capacity, 1A charge current max, 13V5 input to the BQ24617 (a TPS40210 SEPIC makes the 13V5 from USB or wall plug, see below) GasGauge is BQ20z65. Power input from both USB (500mA limited) and wall...
    on Feb 8, 2011

  • Forum Post: Re: bq20z65: Strange flags set

    Jackie Hui
    Nick, Can you clarify the question? Both [INIT] and [DSG] are high as expected in BatteryStatus. [DSG] is set in FET Control register as expected.
    on Mar 4, 2011

  • Forum Post: Re: Programming DFI to bq20z65-r1

    Jackie Hui
    The DFI read/write description in SLUA379 app note applies to z65 (z65 is part of bq20zxx family) as well. The 0x800 size of DFI file created by bqEASY is to account for some of the latest devices. For devices that has less than 0x800 data size, bqEASY fill up the remaining DFI file with "0"...
    on Mar 30, 2011

  • Forum Post: Help with bqEasy chemistry test

    Nicholas Alunni
    Hello, I'm trying to determine my batteries chemistry to calibrate the bq20z65EVM but I'm running into quite a few problems. I was hoping someone here might be able to help me. I'll do my best to describe what I've done so far and the problems I'm facing. Process: I've...
    on Jun 7, 2011

  • Forum Post: Re: Help with bqEasy chemistry test

    Nicholas Alunni
    Update: Instead of using the chemistry test instead I've opted to manually log the bq20z65EVM and then hopefully someone here can figure out what type of battery it is for me. I've seen on a bunch of other forums posts TI Employees letting people know which battery chemistry they're using...
    on Jun 8, 2011

  • Forum Post: bq20z65evm first run problems

    Frank Thomas
    Hallo, I just got my bq20z65EVM board for evaluation. What I first did was that I connected a charged LiPo battery (2 outputs: +/-) to the 1N und 2P (and shorted the other 2P..4P) to pick off the respective voltage (8.2V) at the pack+/pack- connector but it didn't worked. So what did I wrong or...
    on Jun 13, 2011

  • Forum Post: Re: bq20z65evm first run problems

    Viktoriya Sherman
    Make sure that you jumpstarted the board. This is done by connecting the highest cell to pack+. The minimum voltage required to jumpstart is 6V so double check that your pack is at least 6V. If that doesn't work, I would recommend trying a resistor divider and power supply instead of a battery...
    on Jun 14, 2011

  • Forum Post: Impedance Track Battery Charging Question

    Nicholas Alunni
    Hello, I have a question about charging the batteries for the first step of the bqEasy "5. Cycle" process. I am using a 2s1p cell with two 4.2V 4400mAh batteries. 1) Should I charge the batteries while connected to the bq20z65EVM while the Impedance track is "Initialized" (QEN...
    on Jun 17, 2011

  • Forum Post: bq20z65EVM CHGFET and DSGFET Quick Question

    Nicholas Alunni
    Hello, I noticed that when I'm discharging through the EVM the CHGFET and DSGFET are on, when I thought it would be just the DSGFET. I noticed that when I'm charging through the EVM the CHGFET and DSGFET are on, when I thought it would be just the CHGFET. Can someone please explain or...
    on Jun 17, 2011

  • Forum Post: bq20z65-R1 SMBus Address Question

    Nicholas Alunni
    Hello, Section 2.3.11 (pg. 56) " The bq20z60-R1/bq20z65-R1 uses address 0x16 on the SMB for communication." However, the bqEVSW talks to it using SMB address 0x17. In the datasheet, there is an example of how to read from the dataflash that uses both address 0x16 and 0x17 (below...
    on Jun 21, 2011
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