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22 Threads found on edaboard.com: Stability Switching
What about to play a bit with the PLL loop filter and/or with the the charge pump current...Might be possible through the registry settings. Tuning the PLL loop filter there will be a compromise between spur rejection, loop stability, and PLL frequency switching time.
I make standby switching power supply with Flyback Controllers on 135kHz 5V max 1,5A typical 600mA. Due to cooling in another power supply, must be between the switching transistor and transformer (EE16) distance about 60mm. It will be a big problem for the stability of the power supply?
Don't care about the phase near switching frequency and above. The system can't be described as time-continuous and analyzed with bode plot in this range. The results above 50 kHz are effectively meaningless for stability analysis. The basic problem is that you have no phase margin according to bode plot. Step response is respectively bad. You s
i dont have any idea which kind of design equations i should use to get the overall stability margins....Moreover, what kind of simulations i should use in cadence to check stability. Can you please give me any link to study
Hi, I designed a class D switching converter with PWM feedback. Circuit diagram is attached. Now i am having problem in understanding the stability of overall PWM feedback. What should be the properties of error amplifier in this configuration. Moreover, though i have implemented PWM feedback using an opamp in summing configuration, i have no i
In this image I think I can grasp your overall intent, except for a couple things. What is that arbitrary source Blim doing? What's controlling it? As far as I can tell your EA output is not connected, so I don't think it can be the source of the oscillation. Your AC plots look okay for the most part, and I doubt the osci
Hi - I have a synchronous voltage mode boost converter design using the TI TPS43000 that is giving me headaches. Its stability seems to be fairly load dependent, which doesn't make a lot of sense to me. With my current compensation network, it oscillates at low loads, but not high loads. Can anybody suggest why the load current is affecting my stab
It is easy to understand from the bode of LOOP gain that the higher frequency the lower gain which is able to reject the amplify of the ripple voltage with the switching frequency.However, from the expression of ripple voltage,the higher the switching frequency the small the ripple voltage (IL/8*fs*C
"The problem with a conditionally stable system is that something may cause a gain decrease, for example increased load or decreased line voltage, and this could cause the system to go unstable. This is why conditionally stable systems are testing Power Sources For stability generally to be avoided, although there are advantages to
We've done this and it pays off for noise & stability. You have to post-filter it. You may also chop the error amp (if any). The scheme I know, just uses CMOS switches to ping-pong the diff pair inputs and outputs. There is some residual noise as the offset becomes periodically reversing, averaged to zero. In a switching regulator this is
Hi,your circute will work but you need to use pull down resistor to ground for more stability, and for the value of the triac you can simply use BT136 please refer to it's datasheets for more information.
Does SPICE simulation include the high order (high frequency) poles/zeros effect in converter system? I have a boost converter system with variable load. I have compensated the loop with heavy load and the crossover frequency is about 15% of the switching frequency. Then I found when the load is light, the crossover frequency increases a lot, even
Do you aware about switching noise/substrate coupling during design? Do you apply any techniques to decrease both? The most probable reason is that your analog blocks (e.g. banfgap) are affected to noise of switches. If you have testpoint on bandgap output you can try to introduce some capacitance by probe. It may increase stability if the reaso
I am interesting in design a power supply, with the next characteristics: Voltage: 0-30 volts Amperes: 0-5 amperes Shorcircuit protection Good stability Linear or switching?, I think linear is most easy, and with low noise....Your opinions? Jose Use just a little your own brain. For 30V on output you need a
Advantages of switching P/S: Higher efficiency, resulting in lower heat, resulting in smaller heatsinks. Smaller transformers, smaller capacitors, smaller overall packages. Disadvantages: higher output noise, higher and harder to fix EMI, some stability challenges, usually more expensive, magnetics are harder to design and build. Advantages o
Hi guys: Now I need to design a DC-DC converter,switching frequency is 1Mhz,and I have read AI.Pressman's <switching power supply design> ,and it seems to me that the book focus on the voltage-mode doing a lot of analysis on the voltage mode stability.But what about the current-mode,since the inductor will not contribute a pole to (...)
DCM is in many cases just a consequence of light load operation. Under normal conditions, the P/S operates in CCM, so that is where you compensate it, although you need to verify stability at DCM. For flybacks operating in CCM the loop will be much slower, to deal with the right-half-plane zero, so the slow loop will behave very well under DCM.
Can you point to any connection between stability and Vin-Vout difference ? .. I think one stage dc-dc (24-to-1.25) should be just fine .. Regards, IanP
Due to the switching behavior Class E are rather power converters than amplifiers, when the output voltage is entirely determined by the supply voltage and load network elements. In this case the stability shouldn?t be a problem but you have to look for the stability of the entire circuit, when usually the Class E final stage uses in the (...)
There two different topics here: 1. Lock detection 2. Cycle slip detection The circuit above detect a single slip. The slip detection is used to a. accumulate the slips to have a phase synchronious switching between 2 frequencies b. increase gain of the chargepump if some slips accumulate (only 1 slip decrease stability) to speedup settl