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bq78PL114
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  • Forum Post: UPS-like application of bq78PL114 ?

    AlexD
    Is there anything preventing me from using bq78PL114S12 and 4X bq76PL102 to manage a 12S Li-Ion cells in UPS-like application, when the battery pack is always connected to the charger ? I am interested to use cell balancing feature of bq78PL114 extensively. I'd like to make some visual indication...
    on May 18, 2009

  • Forum Post: BQ78PL114 Coulomb Counting

    Rick12368
    The datasheet for the BQ78PL114 indicates the coulomb counter is accomplished using an 18-bit sigma-delta ADC. What is the conversion rate of the ADC; or more specifically, if the current is a dynamic signal, what will be seen or not seen by the counter?
    on Jun 4, 2009

  • Forum Post: FS bit of OUTPUT_CONTROL register in bq77PL900

    sean lee11942
    According to the datasheet page 48, if FS =1, the UV detect delay time will be shorten. Try to set FS bit=1 in "stand-alone" mode, I found it is the same as FS bit =0. ie. the delay time is the same (1,2,3,4,5,6,7,8 sec) So, FS bit is only for host-control mode?
    on Jun 8, 2009

  • Forum Post: Re: bq78PL114 Powerpump design

    PerBear
    PerBear Does it exist any description on how to design the powerpump external circuitry, or is the recommended procedure to do a circuit simulation? I have not received any feedback on this so it might be wrong forum, but I try once more: In SLYT322 a switching frequency of 200kHz and duty...
    on Jul 25, 2009

  • Forum Post: bq78PL114 Powerpump design

    PerBear
    In the litterature for the bq78PL114 IC and on it's evaluation board, the powerpump uses the same design including two MA21D3800L and a FDC6327C dual (P/N) FET. Due to weight and space constrains, I would like to evaluate other possible components. In addition, I would like to know how to adjust...
    on Jul 19, 2009

  • Forum Post: bq78PL114- which chemistry file to use with LiFepo4?

    reagle
    Which chemistry ID would you suggest using for bq78PL114 with large LiFePo4 cells , such as PSI or Headway 38120S? These are not nanophosphates, so I am guessing chemistry 400 (A123) is not correct?
    on Aug 31, 2009

  • Forum Post: Re: bq78PL114- which chemistry file to use with LiFepo4?

    PerBear
    reagle Which chemistry ID would you suggest using for bq78PL114 with large LiFePo4 cells , such as PSI or Headway 38120S? These are not nanophosphates, so I am guessing chemistry 400 (A123) is not correct? Hi Reagle, I know nothing about PSI but A123 26650 and HeadWay 38120S has both 8mohm impedance...
    on Aug 31, 2009

  • Forum Post: Re: Temperature sensors on bq78PL114S12

    WM5295
    The temperature slope in the bq78PL114 is based on 2 series 4148 diodes as shown in the datasheet. Without being a semiconductor physicist or having tested it, I expect 2 single diodes in series to work allowing a configuration where each cell is near a sensing diode like: O.OO.O You will likey want...
    on Sep 5, 2009

  • Forum Post: Temperature sensors on bq78PL114S12

    PerBear
    On the bq78PL114 the four inputs for external temp sensors can be multiplexed for up to 12 external temp sensors. On the -S12 version, this oportunity has been removed and it is only possible to use four external temperature sensors. Additional sensors must be connected via slaves (bq76PL102 or bq76PL104...
    on Sep 2, 2009

  • Forum Post: Re: Doubts related to bq78pl114 configuration files .tmap and .aux.

    WM5295
    Yes, enter a value of 1 in the aux file and in the formula. The terminology for the device for 4 series cells in parallel for example would be 4 series cells and 1 parallel cells, the pack would commonly be described as 4S1P. The parallel count for the device is 1 although there is nothing extra in parallel...
    on Sep 5, 2009

  • Forum Post: Re: Battery management for >12s Li-Ion

    WM5295
    The bq78PL114 with the S12 firmware will support up to 12 cells as noted. The part does not have features to make stacking multiple systems convenient.
    on Oct 8, 2009

  • Forum Post: Re: My application has a large current spike causing bq78PL114 EVM to trigger HSC (Hardware Short Circuit) - make it stop!

    WM5295
    The expanded current capability with the S12 firmware and the 1 mOhm sense resistor seems like a better approach for your application. Some things to watch for when changing to the S12 firmware, see the datasheet and technical reference manual for difference details: Sense resistor value needs...
    on Oct 8, 2009

  • Forum Post: My application has a large current spike causing bq78PL114 EVM to trigger HSC (Hardware Short Circuit) - make it stop!

    DogZapper
    For my application I have a LiFePO4 battery pack 4s2p that needs to supply lots or current for a short period of time. If I connect this load (solenoid & DC motor) directly to the battery pack all is ok. But when I insert the EVM into the mix...I always get a HSC (Hardware Short Circuit). I've...
    on Oct 3, 2009

  • Forum Post: PowerLAN protocol

    Joox
    Hi, i would like to comunicate to BQ76PL102 by means of the PowerLAN protocol (to stack more cells and test other algorithms) . Is the specification of this protocol available?? Thank You!
    on Oct 23, 2009

  • Forum Post: BQ78PL114 FIRMWARE

    Dag Lundstrom
    Hi, I just received the EVM for BQ78PL114 and played around with it. I then (mistake) changed the FIRMWARE to the S12 (FW5000) version. How do I change it back to the FW4452 version? The EVM files did not seem to include a file that can be used to revert back to the original sw. Regards Dag
    on Oct 24, 2009

  • Forum Post: Re: BQ78PL114 fuse location & LED questions

    PerBear
    Excellent, thanks to both of you for answers regarding the LEDs! Regarding the chemical fuse: It seems that the largest rating available is 15A and this is unfortunately too small for my application. I think I will instead use the 40A rated Littlefuse "456" that handles 60V DC within UL spec...
    on Dec 2, 2009

  • Forum Post: bq78PL114 firmware change to bq78PL114s12, voltage calibration does not work for 5 cells or more

    Andreas S
    since i changed the firmware of the bq78pl114 to s12 (fw 5000), the calibration of the 5th cell (bq76pl102) does not work any more. The out of the box calibration of bq76pl102 is not good enough (100mV offset at 4.0V) to avoid calibration. Is there a solution? Where can i get the old firmware...
    on Dec 1, 2009

  • Forum Post: BQ78PL114 fuse location & LED questions

    PerBear
    On the BQ78PL114 there is a SPROT pin for trigging a chemical fuse. I believe this fuse should be physically located between the DSC and CHG FETs for optimal thermal contact with the power transistors. This way the fuse will also act as a thermal fuse and interrupt current in case of thermal runaway...
    on Nov 30, 2009

  • Forum Post: bq78pl114 with bq76pl102 battery pack assembly cell contacting order

    Andreas S
    The input of the bq78pl114 voltage measurement should not exceed 5V. If the battery pack assembler has to connect the battery to the pcb, does he has to take care for the order he makes the contacts to the cells, for example: most negative first, than contact to first cell, than second cell ... What...
    on Dec 2, 2009

  • Forum Post: Re: bq78pl114 with bq76pl102 battery pack assembly cell contacting order

    PerBear
    According to the 8S EVM manual, point 6.5: Cell connections must be made in sequence from lowest to highest voltage as described in the following steps for the EVM: Connect the high-current wire from the lowest potential (bottom) of the battery cell stack to the EVM BATT- terminal Connect...
    on Dec 3, 2009

  • Forum Post: Re: bq78pl114 with bq76pl102 industrial calibration without bqwizard

    Andreas S
    Dear Jim, Thank you for your fast answer. i just took a new pcb into operation. I pushed the 76PL102 calibration into the 78PL114 (not 78PL114) using the "calibration transfer bit" and a calibration/relearn sequence. The result was obvious, the cell 5 voltage is nearly exact. Reading...
    on Dec 3, 2009

  • Forum Post: Re: bq78pl114 writing to BatteryMode() for broadcasting fails

    Andreas S
    Hello Jim, the data-sheet of bq78pl114 specifies the compatibility with Smart Battery System (SBS) Specification 1.1 requirements (page 1, 16) . This data-sheet specifies also the R/W word possibility of the Battery_Mode (page 22). SBS 1.1 specifies the same. I think, there is a deviation between...
    on Dec 11, 2009

  • Forum Post: BQ78PL114 and EV2300 software

    Achmed Giesler
    After failing to obtain a BQ78PL114 evalaution board, I have built up my own evaluation board. The only interface I have available to communicate with the PL114 SMbus from my PC is to use the EV2300 interface box. Can anyone help me with what software I must load on my PC to communicate to the BQ78PL114...
    on Dec 7, 2009

  • Forum Post: Re: Firmware/config cause for incorrect bq78PL114S12 current reading?

    Jim M15252
    Start with FW5000. Set your .tmap file for the number of series/parallel cells. These can be found in the bqWizard install directory under bq78PL114S12. After you select the 0.001 Ohm resistor using Hardware Configuration Register bit 10=1 and 11=1, do a relearn/initialize command to make change...
    on Dec 22, 2009

  • Forum Post: USB-TO-GPIO firmware update for bq78PL114 and back again

    Andreas S
    i updated the TI USB-TO-GPIO adapter firmware (usb.bin) to work with the bq78PL114 SMBus. Now the battery with the bq78PL114 is evaluated and works fine, but i can not access any more the SMBus charger device. To have access to my charger, i need the normal firmware for the USB-TO-GPIO adapter back...
    on Dec 4, 2009
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