Search:

Type: Posts; User: Bjtpower

Page 1 of 11 1 2 3 4

Search: Search took 0.03 seconds; generated 1 minute(s) ago.

  1. Closed: Hello for Understanding USB Impedance for the EMC Analysis

    Hello All,

    Pls find the attached figure.
    148547

    i want to understand the impedance of the USB Device/Host.

    The communication is working on the 12MBPS Datarates.

    i want this resistance to...
  2. Closed: understanding MOV Operation with waveforms.

    Can one help with the diagram of step by step ac to ac waveform till mov.

    I want to understand how does mov clamps.. in full cycle of ac amplitude 230V

    and varistor is off the 30V..

    i want...
  3. Closed: Can anyone help me with the Fuse and PTC LTSPICE Models

    Can anyone help me with the Fuse and PTC Ltspice models for the Simulations.

    Or how we can prepare the same..?

    Regards,
    MARX
  4. Closed: Capacitor sudden discharge time when output gets shorted

    Hello Guys,

    i am trying to calculating the Fuse value when output gets short in abnormal conditions.

    The attached files is off the Power integrations secondary side.

    Simulations file is also...
  5. Closed: Re: How much time require for the varistor to fail..??

    Guys.. After lots of research.

    i got to understand that the mov/Fuse will be used for the Surge protections.

    Can anyone have a idea of using fuse vs PTC

    I find a PTC goot option
  6. Closed: How much time require for the varistor to fail..??

    Hello Everyone,

    I want to understand the Varistor Selection for the Continuous Current.

    I am not going to use the Varistor for the impulse operation.

    All the datasheet mentioned here mostly...
  7. Replies
    1
    Views
    461

    Closed: AC Voltage (230v) control through mosfet

    Hi.

    I am designing a circuit where AC voltage will will be off by Mosfet.

    Can anyone tell me a way how it ca be done.?
  8. Replies
    3
    Views
    548

    Closed: Re: 230V Reverse voltage AC Protections

    Can you pls Suggest..?

    - - - Updated - - -

    upto 35 volt it can withstand..?

    I want to understand how you calculate the 77V..?

    - - - Updated - - -
  9. Replies
    3
    Views
    548

    Closed: 230V Reverse voltage AC Protections

    Hello Guys,

    i am facing problem while designing the Transorb or the MOV here in my circuits.

    Circuit is attached where user bimistakely apply the 230v to the Output side and it damages the 28V...
  10. Closed: What parameters are take care while designing a opamp as a comparator

    Hello Guys,

    I have cross reference of the one design where they have used LM393 Opam as comparator.

    I dont know the paramaters are taken into considerations.

    I would like to understand what...
  11. Replies
    4
    Views
    1,082

    Closed: Re: Stress Analysis of OPAMP_LM393

    What would be the Maximum current..?

    What datasheet maximum rating?

    I am not able to get from the Datasheets.

    Can anyone explain..?
  12. Replies
    4
    Views
    1,082

    Closed: Stress Analysis of OPAMP_LM393

    Hello Guys,

    Pls find the attached Schematics.

    145376


    Now for the stress Analysis, i am facing lots of issues.
    1) How much current should i have to considered..? Does it from Datasheet?...
  13. Replies
    5
    Views
    1,007

    Closed: Re: JTAG Series resistors understanding

    But there should be some calculations and power loss ocurred across it.
    I am using 22.1 OHM Resistor with 3.3 Will be logic high level voltage.

    Regards
    Marx
  14. Replies
    5
    Views
    1,007

    Closed: Re: JTAG Series resistors understanding

    No.. For stress analyis we have to consider the voltage across the resistor and and the duty cycle.

    I dont know much about the Duty cycle.

    I know it is a Fast communications.

    Want to...
  15. Replies
    5
    Views
    1,007

    Closed: JTAG Series resistors understanding

    Hello Guys,

    I am working on the stress analysis of the Resistors.

    Where in a case of the JTAG Connections.

    there is an Series resistor of 22 ohm between Controller and connectors.

    Now if...
  16. Replies
    11
    Views
    1,030

    Closed: Re: Power estimation of IC's

    Hi Schmitt,

    I have been confused in the Supply Current (ICC) & INPUT Sink current.

    For the, Power consumption which parameters are corrent to take in account and why..??
  17. Replies
    11
    Views
    1,030

    Closed: Re: Power estimation of IC's

    Hi,
    Here i have attached the OPAMP snapshot to understand the Better.

    I am using the OP-AMP 393 in Comparator mode.

    Where output is pulled up with the +5V with 2.1K resistor.

    Now attached...
  18. Replies
    11
    Views
    1,030

    Closed: Re: Power estimation of IC's

    Hi Klauss.

    if the Input pins will be floating, then how it can consume current.

    Another, I want to Make specification for the Micro controller.
    Where i am conflicting between the Max power...
  19. Replies
    11
    Views
    1,030

    Closed: Re: Power estimation of IC's

    Hi..
    Coming to the Controller.
    I am using controller STM32F417IGH6.

    Now i want to make a proper calculation for the same.
    http://www.st.com/en/microcontrollers/stm32f417ig.html

    Now the...
  20. Replies
    11
    Views
    1,030

    Closed: Power estimation of IC's

    Hello Guys,

    I want to calculate the Approximately Power required for the IC (LM339 or KZ8081RNA)

    Which parameters are taken consideration while calculating the same..?

    Kindly help for the...
  21. Closed: Re: Problem Facing while Multiple Circuit is connected After Bridges.

    Post #18 is right.
  22. Closed: Re: Problem Facing while Multiple Circuit is connected After Bridges.

    Lets take a example.
    Vref'=1.2V(120V)
    Vref=1.7v(170V)

    Now when vin is 1.21V
    Upper opamp will be high because Vref'<Vin and lower Op-amp (Input of Base)=0V COZ VREF(1.6V)>VIN(1.2V)->Bjt is in...
  23. Closed: Re: Problem Facing while Multiple Circuit is connected After Bridges.

    HI,

    Its complementary output..??

    Output for the Mosfet M1 & M2 are take from the Base and Collector.

    So when base is low,Collector Voltage would be High.

    When base is high, Collector...
  24. Closed: Re: Problem Facing while Multiple Circuit is connected After Bridges.

    Hi Klauss,

    the Vref is generated by the Fixed supply of +5V of op-amp by using the Voltage dividers

    - - - Updated - - -

    Here is the circuit of vref and vref'

    142512142512
  25. Closed: Re: Problem Facing while Multiple Circuit is connected After Bridges.

    Yes,

    You understand it clearly.

    There are only 2 circuits (Lytswitch Followed by Leds (Load)) and another is the voltage divider for the AC Voltage detection followed by the Hystresis...
Results 1 to 25 of 272
Page 1 of 11 1 2 3 4