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HOTSWAP
Related Posts

  • Forum Post: TPS2491DGSR MOSFET PART SUBSTITUTION

    Matthew McFarland
    On the data sheet the IRF540NS, however the availability for that part is not so good. What would be a good part substitution for this part? Would the 2SK2503 be a good part substitution? Thanks, Matt
    on Sep 21, 2010

  • Forum Post: TPS2493EVM Mod for higher current

    Brad A
    Re: TPS2493EVM Does this eval board have the traces to handle 20 amperes? Can it be modified with part changes to have a 20 amp current limit? What is its availability?
    on Oct 11, 2010

  • Forum Post: TPS2456 Ouput Startup Voltage

    Hughie Lu64602
    Hi, In the TPS2456 datasheet page10, the figure11. and 12. show the startup waveforms. I discoverd the different between light load and heavy load startup. Why the output startup voltage at the light load was act like has a voltage shift on it, but heavy load not? Thanks. Regards, Hughie...
    on Mar 15, 2011

  • Forum Post: Re: TPS2456 Ouput Startup Voltage

    Hughie Lu64602
    Hi, Per to experimental result from the TPS2456 EVM, the OUTx didn't appear initial step. It really seems there was some anomaly (scope, setup. etc) at the light load plots in the TPS2456 datasheet. If there were not any detail I had lost, it would make sense for the following plots. ...
    on Mar 21, 2011

  • Forum Post: TPS2590 startup

    David Wende
    We are using the TPS2590 on a hot-swap board with design as follows: VIN = 12V VLIM = 34k (5.9A) VFLT = 49k (4A) CT = 1.5uA (58mS) RTRY is open EN pin is pulled to GND by 4.7k The voltage on the back-plane is decoupled by about 30 capacitors of 330uF each. The capacitance on our...
    on Jul 25, 2011

  • Forum Post: Error in LM5067QuickStartCalculator2.0

    Goran Mork
    The timer setting calculation of the calculator seems to be seriously flawed. With a 3A current limit, 90W power limit, 106uF load cap and -72V in, a time of 2 ms was displayed. A Spice simulation with a similar LT part with a PWL constant power limiter added, produced a 3.8 ms current/power limiting...
    on Dec 8, 2011

  • Forum Post: Re: TPS2459 Hot Swap

    Ankit Kumar
    What i have thought is as follows: I will use a 2:1 master selector IC (PCA9541) and connect both the controller cards on I2C bus to this IC. This IC receives I2C lines from both the controller and routs only one I2C bus at output. " Suppose if one controller card is removed or inserted...
    on Feb 9, 2012

  • Forum Post: TPS2459 Hot Swap

    Ankit Kumar
    Dear Sir, In my design, there is a I2C backplane and 16 number of cards. Among these 16 cards, there are 12 general purpose I2C cards, dual redundant Power supply cards and dual redundant controller cards. Before each slot on backplane, i am using TPS2459 whose inrush current limit, operating current...
    on Feb 9, 2012

  • Forum Post: Hotswap operation with negative supply current

    Derek King
    I have an application where I would like to use a TPS290x as a circuit breaker for an externally connector motor driver. The motor driver will produce regenerative power when slowing the motor this regenerative power. This regen power cannot be blocked by the mosfet and will produce negative current...
    on Mar 4, 2012

  • Forum Post: TPS2493 - GATE pin state during startup

    fdm
    Hi, In my custom prototype board there's a short (~20us) pulse of current (~150A peak) immediately after the input voltage is applied - I think it's due to gate capacitance charging after the MOSFET Vds application. UVEN and OV pins are connected to the input voltage thru resistive divider...
    on Mar 15, 2012

  • Forum Post: TPS23756 Hotswap MOSFET not blocking Auxiliary Voltage

    Michail Klimkovic
    Hi, I am evaluating TPS23756EVM for my future design. When I power the board with only Auxiliary power (e.g 24V, no cable in the RJ45 jack), there still appears voltage between VDD and VSS. The jumper configuration is as follows: J9 - PPD1 (PPD is pulled down to VSS by 5k49 resistor) J10...
    on Apr 14, 2012

  • Forum Post: TPS2400 external gate capacitor to reduce inrush current

    Rogerio Santiago Ribeiro
    TPS2400 datasheet, Pag 7 (SLUS599A − JUNE 2004 − REVISED AUGUST 2008) states that an external capacitor and a 1K resistor can be used to reduce inhush current farther. I am in doubts about the right connections of the resistor and capacitor. I think that should be the the capacitor between...
    on Jul 18, 2012

  • Forum Post: LM5064 comparator threshold

    Kohei Sasaki
    LM5064 has many comparators which detect WARN or FAULT. In FAULT or WARN detect condition, those are detected when threshold is reached? Or does reading value have to over threshold? Do comparators have hysteresis?
    on Sep 25, 2012

  • Forum Post: LM5069-2: MOSFET blow up when output short

    BAOCHAO YIN
    Hi, My application is 54V/12A. I used the downloaded EXCEL tool to design the circuit. The MOSFET is STP75N75 which has a 300W Pd. My question is the MOSFET blow up when the output is short circuit. Would there be anyone who can help me and give some suggestion? Thanks a lot. (Please visit the site...
    on Oct 14, 2012

  • Forum Post: TPS2492PW Overvoltage Input (OV)

    Vladimir Nohava
    The OV internal reference ( V OV_H - Threshold voltage ) is affected by which parameters? (1.31Vmin 1.35Vtyp 1.39Vmax) Does these parameters include temperature and lot-to-lot tolerance? If temperature is involved, in which direction does it effect the min/max values? (cold = towards 1.31V or 1.39V...
    on May 21, 2013

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