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Type: Posts; User: BoopathiS

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  1. Closed: MOSFET linear and saturation region operation

    Hi,

    N channel MOSFET Saturation operation condition is Vds > (Vgs - Vth).
    But in saturation region, MOSFET will act like closed switch. hence Vds is approximately 0V(Rds*I). Examble VGS = 10V and...
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    [SOLVED]Closed: Re: Generating more EMI due to BLDC motor

    Hi All,

    Identified Motor driver output is the EMI noise source. Added suitable Ferrite core nearer driver output cable, EMI noise is reduced much.

    Thanks...
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    430

    [SOLVED]Closed: Re: Generating more EMI due to BLDC motor

    Hi,

    KlausST Thank you so much for all your answers, its more useful for me.

    Really not having idea of how to test/debug this. That's why guessing some root causes.

    Motor cable length is...
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    430

    [SOLVED]Closed: Generating more EMI due to BLDC motor

    HI,
    I'm controlling BLDC motor(Blower) using Half bridge driving circuitry. When running only blower during EMI testing, at 63MHz frequency more EMI noise is producing(6db more than limit)....
  5. Closed: What will happen if battery cell draws more current than rated

    Hi,
    Battery cell can deliver current based on load. I'm using Samsung 33G cell, which has 6A continous and 9.75A discontinous discharge current. Can i use it for 9A for 20mins ?
  6. Replies
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    Closed: Re: SMPS electrical noise issue

    Thanks, Now I checked with 45 turns CM choke.Issue is repeating. Then added two 45 turns CM choke assembly in series with SMPS DC output, Not seeing much improvement.
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    Closed: Re: SMPS electrical noise issue

    Thanks to FvM and Easy Peasy for giving valuable suggestion.

    I checked with common mode choke and Ferrite core with 8 turn at SMPS output terminal. Issue reproducing.

    I connected Copper plate(...
  8. Replies
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    Closed: SMPS electrical noise issue

    Hi,
    I'm using class 2 medical graded SMPS in our device. So earth connection not recommended. When connecting SMPS to Load(contains Capacitive Touch LCD),
    Touch function getting...
  9. Closed: Re: LTC 4015 IC gets failed when used for separate charge and discharge path

    Hi,
    In brief, my description is i want to use LTC4015 IC for separate charging and discharging path. From application circuit, to implement separate charge and discharge path i want to ...
  10. Closed: Re: LTC 4015 IC gets failed when used for separate charge and discharge path

    Hi Klaus,
    Sorry for miscommunication, SYS terminal is the input voltage pin. Rocker switch is connected across J2 connector in Schematic. Switch not included in schematic....
  11. Closed: Re: LTC 4015 IC gets failed when used for separate charge and discharge path

    Hi,
    In Schematic 2, When connecting U2(OUTFET MOSFET) drain terminal to Inductor terminal and after removing C69, C70 capacitor, board is functioning properly. This circuit is same like...
  12. Closed: Re: LTC 4015 IC gets failed when used for separate charge and discharge path

    Hi Klaus,
    Thanks for response. Exact schematic only updated. can you say what are the point you are not getting clarity ?..

    Updated both schematics below,

    Schematic1 :...
  13. Closed: LTC 4015 IC gets failed when used for separate charge and discharge path

    Hi,
    I did experiment on LTC4015 IC for battery charging and discharging.

    As per datasheet typical application circuit, Verified Vin and battery charging and discharging. Its working...
  14. [SOLVED]Closed: Re: LTC 4015 IC getting damaged when connecting battery sometimes

    Hi,

    R9 part changed and C25, C27,C28 capcitor placement changed as per 4015 IC manufacturer recommendation. Issue got solved. Thanks for all your input.
  15. [SOLVED]Closed: Re: Randomly facing I2C communication failure with LTC4015

    If this is an issue, when we resetting I2C transreceiver supply voltage (VDDA/VDDB supply), I2C transreceiver should reset correct ?

    But when we resetting Slave device supply voltage only issue is...
  16. [SOLVED]Closed: Re: Randomly facing I2C communication failure with LTC4015

    Hi,

    Sorry for wrong statement. Slave is not holding SCL line to high. Due to pull up resistor SCL goes to higher level.

    Now we did I2C recovery testing as recommended above, but still facing...
  17. [SOLVED]Closed: Re: Randomly facing I2C communication failure with LTC4015

    Thanks FvM. Before going to test i need clarification on above points,

    We are sending clock pulses from STM32F4 controller(Master) to 4015 IC (Slave).clock pulses are not reaching the...
  18. [SOLVED]Closed: Randomly facing I2C communication failure with LTC4015

    Hi all,
    LTC 4015 is interfaced with microcontroller through I2C differential transreceiver circuit.
    Communication breaking between controller and LTC4015 randomly.

    Steps:
    ...
  19. [SOLVED]Closed: LTC 4015 IC getting damaged when connecting battery sometimes

    Hi,
    I'm using LTC4015 circuit for battery charging. I'm facing 2 issues with that.

    Schematic :
    149283

    1. When connecting battery, sometimes LTC4015 getting damaged.

    I understood...
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    [SOLVED]Closed: Re: Reading LTC4015 coloumb counter

    Thanks.. We are using switch for ON/OFF battery to avoid self discharge, due to this coulomb counter resetted. To avoid self discharge we disconnected Telemetry system in 4015, hence its consuming...
  21. Closed: Standard and OTG USB port circuit connection

    Hi,
    I have USB 2.0 OTG port in SOM, I want to connect standard USB 2.0 connector to USB OTG port of SOM. USB OTG port contains D+,D- and ID. Standard USB has D+, D- and not contains ID...
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    [SOLVED]Closed: Reading LTC4015 coloumb counter

    I'm using I2C communication between LTC4015 and microcontroller for reading battery coloumb value.

    To store this value, there is no non-volatile storage memory available in LTC 4015. We want to...
  23. Closed: Re: CR2032 Battery connection to microcontroller for Internal RTC feature

    Hi andre,
    Thanks....

    Sure i will check battery holder as per your suggestion.
  24. Closed: Re: CR2032 Battery connection to microcontroller for Internal RTC feature

    Hi KlasuST,

    Thanks for your input. I will checkout.
  25. Closed: Re: CR2032 Battery connection to microcontroller for Internal RTC feature

    Thanks KlausST for immediate response.

    My doubt is,

    I'm directly connecting battery to controller, so it requires any protection circuit or not ? (like series diode with battery)
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