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Compensation
Related Posts

  • Forum Post: Re: Design with TPS40054

    Peter Miller13277
    Don't be sorry about the questions, asking questions is one of the ways we learn. 1) How can I understand the crossover frequency ? And how can I calculate it? SwicherPro tell me 17,8KHz. Cross-over frequency is the frequency where the magnitide of the full loop response (Error Amplifier, Modulator...
    on Jul 16, 2010

  • Forum Post: Re: TPS40211

    Peter Miller13277
    Chris, The TPS40211 controller does not have any intentional method for forcing the output ripple on the error amplifier output (COMP pin) When you adjusted the crossover frequency, what components did you change? The typical control loop contains 2 capacitors and a resistor between the FB...
    on Oct 6, 2010

  • Forum Post: TPS40211 SEPIC Compensation - Switching Noise on COMP

    Chris Davies
    We have designed a 10 - 20V input 14 V 1A LED driver using the TPS40211 in a SEPIC configuration. Similar to the TI application note. We have found poor stabilisation of the output current, drifting with time and temperature ( 10% variation ). On investigation this has been due to a large component of...
    on Oct 6, 2010

  • Forum Post: Re: TPS40210 compensation

    Peter Miller13277
    Mark, It's hard to provide specific recommendations based only on this response. Do you have a schematic you can share? The switching period appears to be about 1.7ms and since I expect your target switching frequency is faster than 590Hz, you're severly pulse skipping. The COMP voltage...
    on Oct 26, 2010

  • Forum Post: TPS40210 audiable noise when dynamic load

    cai chengzuo
    Hi I am using TPS40210 for a 5V->12V non-isolated converter, when I doing the dynamic load test (1KHz, load_high: 1.3A, load_low: 0.01A, 50% duty), audiable noise can be heard, may be from inductor. Can some one help me to remove this noise? The design requirements are: VIN: 4.75V~5.25V ...
    on Dec 23, 2010

  • Forum Post: External Current-Boost for MC33063 buck converter

    Renjith Narayanan
    Hi For my project i want to use a dc-dc converter input 24V Output 5V,1.5A I am using MC33063 with external current boost transistor (npn), is anybody worked in this circuit Also please share the critical points to be taken care Any answer in this will be appreciated With Best...
    on Apr 28, 2011

  • Forum Post: Re: MC34063 (MC33063) Timing Capacitor

    JohnTucker
    Yes it can be tricky compensating current mode control. The best approach is to get close using the approximations in teh datasheet, then measure the actual powerstage characteristics, from there it is straght forward to chose the best crossover frequency and compensation components.
    on May 12, 2011

  • Forum Post: Re: TPS54620 not stable with different load conditions.

    Nick McMilan
    Hi John, The requirements of my design does not allow me to change components. Can you please recommend one set of compensation values for my 6 conditions? Vout 2V and 5V, at Iout of 0A, 2A and 6A. When using Switcher Pro, it recommends 6 different set of compensation. When I try 2v or 5V...
    on Jun 10, 2011

  • Forum Post: Re: TPS40210 design loop compensation

    Na Kong
    Hi Anshul, I think the compensator design is good. You can go ahead with these values. I have put the parameters you have into SwitcherPro, the frequency where the gain margin is given is way above switching frequency. Since the model is not accurate after 1/2 of switching frequency anymore, the...
    on Jul 12, 2011

  • Forum Post: Re: Shut down modes of TPS65131

    Brigitte
    Hello Chuck, Neither the series resistors to the feedforward capacitors nor the ones in CP and CN are necessary components. Sometimes when the load transient response of the standard circuit suggestion is not good enough you can add the one or the other of these resistors to increase the bandwidth...
    on Aug 5, 2011

  • Forum Post: TPS61222 stability with supercapacitor on output

    Dan-o
    I have a circuit still in design which uses a TPS61222. CIN = 10uF, L = 10uH, COUT = 10U, with an additional 47mF supercapacitor on the output. The main purpose of this circuit is to charge a supercap for backup supply. There will be no load other than the supercap when the TPS61222 is first enabled...
    on Sep 9, 2011

  • Forum Post: Parametric search is badly organized

    Olli Männistö
    The DC/DC parametric search is good in theory but in practice many of the key fields are missing for many controllers. "Synchronous rectification" flag is not filled for many controllers which imply "syncbuck" in the description. PWM mode (CMC/VCM/DCAP/OTHER) field is rather sparse...
    on Mar 14, 2012

  • Forum Post: LM2743 adjusting components

    ricardo paharsingh
    We are designing a power solution with a number of LM2743 chips for different supply rails. We are trying to combine some inductor and capacitor values across those power solutions to minimize our BOM cost. Our difficulty is that WEBENCH, as opposed to Switcher Pro, doesn't automatically re-tune...
    on Apr 2, 2012

  • Forum Post: Can TPS5450 used for buck-boost topology? Is its internal compensation technology a bottle neck?

    Yanbin Zhao92331
    I applied sample of step down converter TPS5450. I want to use it to build a positive buck-boost converter since its compensation is included inside so that less components will be used. My requirement is Vo=12VDC, max output current is 1A, Vin=9VDC~16VDC. The positive buck-boost converter works...
    on Apr 1, 2012

  • Forum Post: TPS54260 For GSM Cell Modem

    cleidigh
    I'm working on a TPS54260 based PS for a cell modem and MSP430 design. I have followed carefully the SLVA412 app note and also read lots of other notes (both TI and others) on the compensation, ceramic cap derating etc.... I found that switchpro seems to fight trying to do things that are more than...
    on Jul 11, 2012

  • Forum Post: Low-Frequency Noise at SEPIC Output (using LM3478)

    Thomas Gay
    Hello My design comprises a SEPIC stage with 4V5-20V input range and 13.5V output at max. 1A. In most cases the load is significantly lighter, coming down to a 0.5W minimum instead of 13.5W. In these conditions there is a strange regulation behaviour seen for higher input voltages. Everything is...
    on Mar 12, 2012

  • Forum Post: RE: Output ripple too high?

    Titusc
    Also, can I use switcher pro on this TPS40322 part?
    on Dec 5, 2012

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