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BQ27510
Related Posts

  • Forum Post: BQ27510 with TPS65010

    speedo38
    Hello, I'm using this two components in my application. I see in the data sheet that the BQ27510 can share the thermistor of the pack with the charger. How this can work with the TP65010. My idea is to use the thermistor with the TPS65010 when the battery is in charge and the BQ27510 when the...
    on Feb 19, 2009

  • Forum Post: BQ275xx with Small LiPo, Light loads, Frequent discharge

    Surfnsand
    I am looking at how accurately I can do coulomb counting (CC) for a small single cell LiPoly battery (less than 500mA-hr) and low average current discharge. In the BQ27510 datasheet, it mentions using a 5mohm to 20mohm sense resistor. Is that necessary and why? I would like to use a larger sense resistor...
    on Apr 24, 2009

  • Forum Post: Re: Golden Image Firmware (DFI) update on bq2750x

    Ming Yu
    Hi, I was talking about the DFI version. For example, if the DFI is generated using FW ver A. You CAN NOT load it into FW ver B. Once it is locked up, the only way is to remove the IC and replace it with a good one. Please refer to SLUA453 for details. Thanks Ming
    on Nov 12, 2009

  • Forum Post: Re: bq27510 without external thermistor... and other basics

    Ming Yu
    Kuba, The TS connection not only for temperature measurement but also serve as part of the BI detection through the thermistor network. Since you are using int temp sensor, I would connect a 10k from TS to ground. If your battery will never be removed, i.e, you don't need a battery insertion...
    on Nov 17, 2009

  • Forum Post: bq27510 i2c works problem

    davied feng
    when i config the bq27510 i write a defualt .dfi in bqeasy 1b step,and click "program dataflash image" then my bq27510 can't read or write through i2c. how to recover my bq27510 configure ?
    on Nov 19, 2009

  • Forum Post: Re: bq27510 without external thermistor... and other basics

    Ming Yu
    yes, you can use other voltage source than battery. The gauge will be powered up even if battery is removed. BI/TOUT is still working even with battery connected to REGIN because that is part of the gauge power up initialization process.
    on Feb 3, 2010

  • Forum Post: Re: Using a BQ27510 EVM

    dMax
    I'm assuming you have completed the prior steps in bqEASY before reaching step 5 (Learning Cycle). At this point you must be using the actual cell that you plan to use in production. You must also have identified the best ChemID match to your cell in step 4 of bqEASY and programmed the corresponding...
    on Mar 17, 2010

  • Forum Post: Re: BQ27510 Need help with writing data flash. Operation Configuration registr.

    Ming Yu
    hi Andrew, Your English is not bad. Your sequence is ok but make sure the checksum is calculated correct. Also write 0x78 in 0x41 and 0x09 in 0x40, then add 0x09, 0x78 and write the sum into 0x60. Please make sure you allow some delay in between each write, particularly on writing 0x0978...
    on Apr 7, 2010

  • Forum Post: Re: BQ27510 Need help with writing data flash. Operation Configuration registr.

    Andrew Strukov
    Hi Ming! Then I write 0x78 in 0x41 and 0x09 in 0x40 I can read these value from address 0x40 0x41 from DataBlock and they are 0x09 0x78. But then I write the value of checksum 0xCA and read it - it doesn't change. I get old value - 0xC9. And data doesn't transfer from datablock to data flash...
    on Apr 8, 2010

  • Forum Post: Re: BQ27510 Need help with writing data flash. Operation Configuration registr.

    Andrew Strukov
    Ming, I read all data from blockdata and they are 09 79 04 2E 00 6E 14 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 -checksum = C9 If I write 0x78 into 0x41, checksum is CA. Checksum = FF - (least-significant byte of sum all data from blockdata) What should I do...
    on Apr 12, 2010

  • Forum Post: Re: Aged battery detection using bq27510-g1

    Teik Hooi Teoh
    Hi David, Thanks for the suggestion. Regarding the updating of FCC after insertion, how soon would it be updating? I was doing a test using a 2200 mAh battery pack with additional resistance (5 ohms) added in series to simulate increased impedance of aged battery pack. Just to see if there will...
    on Apr 13, 2010

  • Forum Post: Re: BQ27510 Need help with writing data flash. Operation Configuration registr.

    Andrew Strukov
    Ming, I try to write new value of ckechsum(CA) but checksum don't update. What can be the reason of this? What are required parametrs for good writing data flash? In datasheet I find only two conditions. The first condition is Voltage() must be more than Flash update voltage from data flash...
    on Apr 14, 2010

  • Forum Post: Re: Aged battery detection using bq27510-g1

    Teik Hooi Teoh
    The system is already up and running when the FCC remains at 2200mAh. Anyway, as you have pointed out the resistance might be too large to simulate the realistic change in battery internal impedance. So I have tried with 500mohm instead and the FCC still remains unchanged. Same when using the 1100mAh...
    on Apr 19, 2010

  • Forum Post: Re: BQ27510 Need help with writing data flash. Operation Configuration registr.

    Andrew Strukov
    Ming, I can't use EVSW. I can't update any information in data flash. Does bq27510 have bit that allow writing in data flash or special delays between writing? Information in Blockdatachecksum doesn't change after writing correct checksum for datablock.
    on Apr 21, 2010

  • Forum Post: Re: Aged battery detection using bq27510-g1

    Teik Hooi Teoh
    Hi, Thanks for the suggestion. Here are the steps to the results: 1. Insert fully relaxed battery (single cell, 1100mAh) while system off (<1mA consumption). 2. bq27510-g1 on my system are programmed with golden profile for 2200mAh battery (two 1100mAh cells in parallel) 2. Turn on system...
    on Apr 23, 2010

  • Forum Post: Re: Aged battery detection using bq27510-g1

    Teik Hooi Teoh
    Hi, Just to repost the broken screen capture image for steps 8:
    on Apr 23, 2010

  • Forum Post: Re: BQ27510 Need help with writing data flash. Operation Configuration registr.

    Andrew Strukov
    David Maxwell, I wrote in the first post here,that I can't use EVSW. I send I2C commands using AVR. That's why I can't use your special programs. It isn't working for me.
    on Apr 23, 2010

  • Forum Post: Re: BQ27510 Need help with writing data flash. Operation Configuration registr.

    Andrew Strukov
    Ming, I changed bq27510 on the other one and I could wrote into the data flash. But I don't know, What was the problem with the first bq27510. Thanks for help. P.S. Where can I find nominal of sensetive resistor in the data flash? I want to change it. Andrew.
    on May 6, 2010

  • Forum Post: Aged battery detection using bq27510-g1

    Teik Hooi Teoh
    Hi, My application requires prevention of using aged/degraded battery pack (or battery pack with same chemistry but lower capacity). The purpose is to ensure there is enough battery capacity to sustain for whole operation whenever a battery pack is inserted to my system. Example, my system suppose...
    on Apr 12, 2010

  • Forum Post: BQ27510 Need help with writing data flash. Operation Configuration registr.

    Andrew Strukov
    Hello! I'm using bq27510 without external thermistor. I connected the resistance of 10K between the GND and the TS. Also connected 18K resistance between TC and BI / TOUT. I need to set a flag TEMPS register operation configuration in 0. I'm trying to rewrite the value in the data flash...
    on Apr 7, 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: BQ27510. CC Gain, CC Delta. Computation.

    Andrew Strukov
    Charles, BQ didn't enter in calibration mode after sending command or it's another reason. At all infrormation from SLUA440 doesn't work. There is no information about calibration NominalCapacity! How can I calibrate NominalCapacity? Thanks, Andrew.
    on Jun 30, 2010

  • Forum Post: Re: BQ27510. CC Gain, CC Delta. Computation.

    Andrew Strukov
    SS bit is clear. The calibration commands don't work. BQ is staying in normal mode. DesignCapacity is located in the DataFlash. I mean NominalAvailableCapacity. "NominalAvailableCapacity( ): 0x0c/0x0d This read-only command pair returns the uncompensated (less than C/20 load) battery capacity...
    on Jul 2, 2010

  • Forum Post: Re: BQ27510 bqeasy error "Dataflash.GasGauging.State.UpdateStatus does NOT = 2"

    Ming Yu
    hi Phil, The screen shot you attached has show VOK and QEN bits are not set. Have you sent IT enable command? I assume you already went through the app note: http://focus.ti.com/lit/an/slua544/slua544.pdf on how to generate golden image. No training cycle gauge is low end gauge and will not provide...
    on Aug 12, 2010

  • Forum Post: BQ27510 bqeasy error "Dataflash.GasGauging.State.UpdateStatus does NOT = 2"

    bluehash
    Hello, I'm using the bqEasy Software for callibrating my Li-Ion pack. Wen done with the full training I get the following error: "Dataflash.GasGauging.State.UpdateStatus does NOT = 2. Impedance track learning cycle was not completed correctly. Verify procedure and repeat." What...
    on Jan 28, 2010
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