Power Management
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battery charger
Related Posts

  • Forum Post: Gas Gauge needed

    Alfredo Grajales
    I´m using a bq24070 to charge a li-ion batt in a portable app as a college project. I use solar cells to provide energy to the system and the batt. I read a little about battery gas gauge ICs to monitor the battery. but I really don´t know how to include that technology in may project. Please...
    on Oct 11, 2010

  • Forum Post: Re: Battery Charger / CV CC Power Supply

    John Richard Howlett
    That was the first place I looked. I've look at a number of parts, many, many parts. I think I found something in the ball park of what I want BQ24747. It looks like it uses an SMB communication protocol, some app notes and demo schematics. Just enough to be dangerous! It would be a perfect match...
    on Oct 21, 2010

  • Forum Post: Re: Battery Charger / CV CC Power Supply

    John Richard Howlett
    So, we make a bi-polar NiMH battery. The max number of cells in series generally stops at 20 in a single module, thus a nominal 24V battery, however the end of charge voltage can be as high as 34 V (although this shouldn't be done unless you really understand what you are doing, thus I need something...
    on Oct 22, 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: Can you recommend a device?

    zou jason
    Our backup power need to support 50v . I used atmel406 array to do this job. We need a new application as comparison. I hope it can integrate charger,monitor,protected. Of course ,it just my hope.If it can not be integrated in a chip.Series chips are good. Thanks for your advices.
    on Dec 10, 2010

  • Forum Post: bq24079 OUT pin creating +/-5V supplies

    MarcosCba
    Chris: Hi, Thanks for your fast answer! Here is the thing… I’m implementing a circuit feed by a Li -Ion battery (3.7V / 850mAh). This battery should power a circuit that needs -5/+5 [V] source and consume less than 200mA. I use BQ24079 for charging the battery form USB port. As BQ24079...
    on Dec 12, 2010

  • Forum Post: Re: bq24079 OUT pin creating +/-5V supplies

    MarcosCba
    Normal 0 21 false false false ES X-NONE X-NONE ...
    on Dec 13, 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: selecting a charger

    Asef
    thanks for the reply.
    on Jan 4, 2011

  • Forum Post: Charger and current divide.

    Cebrail Haluk Gorgulu
    Hello friends i hope you are having great weekend. i wonder that i m working on Liquid filling system using solar energy. but i wonder that i also using peltier in this system. and also using graphic lcd etc... as i know peltier work on 1A /12 V other system Working on 5V /500 mA and i m...
    on Jan 8, 2011

  • Forum Post: Re: Charger selection

    John Carpenter2
    1. Link for package data sheet http://focus.ti.com/lit/ml/mpss005/mpss005.pdf 4. If you tie EN low and the input falls below the battery, the part will go into load mode meaning the battery voltage is shunted to input, it should be fine with the diodes blocking it. But if you only want charger...
    on Feb 11, 2011

  • Forum Post: waking from sleep after charging

    Calum Mackinnon
    Hi, The problem is still a little vague but here is what we know. We are having problems with our product not waking from sleep after charging - perhaps 1% of the units out in the field. The problem is intermittent and not repeatable on demand. So far it seems to be related to AC charging, not...
    on Mar 29, 2011

  • Forum Post: BQ24617 charge will still work while the battery is low

    jun Wang70816
    Normal 0 false false false EN-US ZH-CN X-NONE MicrosoftInternetExplorer4 ...
    on Apr 5, 2011

  • Forum Post: Re: BQ24617 charge will still work while the battery is low

    jun Wang70816
    the charge circuit not working anymore, only battery voltage above 3.2V, is there any solution? thanks,
    on Apr 5, 2011

  • Forum Post: NiMH usb battery charger

    David Forsyth
    I have a project with 4 NiMH AA batteries in a parallel use configuration. As far as I can see, they must be electrically separated for proper charging so I will need to set up a system for separately managing the charging for each battery. I wish to do this powered by a USB bus. I see a lot of choices...
    on Apr 19, 2011

  • 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: BQ24010

    RANDY RADFORD
    I am using a c8051 to detect charger input voltage, but I have almost 3v leaking back from battery to VCC. Any help would be appreciated. My only solutions is to select a P-Channel FET to act as a on/off switch. Also anybody have a favorite P-Channel FET surface mount for this job?
    on May 10, 2011

  • Forum Post: Re: BQ24010

    RANDY RADFORD
    The C8051 senses the charge input voltage, provided by an external 5v supply. I am using 2 - 100k ohm voltage divider, so that I sense 1/2 the voltage. The battery is a Li-Ion polymer battery so the voltage on the output of the charger circuit is a maximum of 4.2VDC and as low as 3.3VDC. ...
    on May 12, 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: Power Path Charger - Part Suggestion

    Borislau Jevic
    Hi, I wanted to suggest a new part for the power path family. My suggestion is the following: Multi-cell charger. Can charge one, two, three or four cells. Pin selectable for Li-Ion/ Li- Pol and LiFePO4 Has two separate input paths, one USB (or x2 for a total of 1 Ah) the other...
    on May 23, 2011

  • Forum Post: Low Power, but not Micro Power, Solar Solution

    Doug Jorgesen
    I am designing a simple meter, it reads a sensor and outputs the reading to an LCD, and I want it to run on a single coin cell rechargeable lithium battery. The system only takes maybe an average of 500 uW when its awake and a few tens of uW while asleep. It needs to be able to stay charged while asleep...
    on May 23, 2011

  • Forum Post: Re: BQ24010

    RANDY RADFORD
    Upon further investigation and using some of your advice. I have determined that the C8051 is apply a voltage to my voltage divider and it is not coming from the charger. I am not sure how to resolve this problem. I think I will use the Power Good signal to see if the VCC voltage has been applied. Thanks...
    on May 24, 2011

  • Forum Post: Is the use of a transformer to isolate an AC power supply to charge a DC system nessisary?

    John Wolgemuth
    In the EV EHV Charger: Level 1&2 diagram it highlights isolation between the AC system and the DC battery pack. Is this isolation provided by the power transformer really nessisary? And if so, why? What benefit does the transformer provide? The diagram specifies a 400+ V battery pack. Is the...
    on May 30, 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: 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
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