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Yes, heavy load means large load current.
That is the reason why I want to know how to calculate output pole. Because I wonder if the output pole is dominant pole.
For example, output voltage is 5v,output capacitor is 1uF, if the load current is changed from 1mA to 100mA, then the pole(if...
JPR,
Thanks for your information. I didn't know there is a delay in chargepump loop before. Did you try to make a behavior model for chargepump?(i.e. average and linearization AC model)
szekit, I did the transient simulation with my circuit. It's always stable in different conditions(i.e...
There is some mistake in your analysis. Let's analyze it again:
At first, we set the output voltage of amplifier A1 is V1, and the no-inverting voltage of amplifier A2 is V2.
If we assume Iref increase ΔI, because Iref=(V1-V2)/Rref, so V2 should decrease, and V1 will decrease too, and then Iref...
en...
But this can only check whether your system is stable or not. It can't guide you how to plan the poles and zero(if need compenstation).
If we should include the chargepump's output impedance, then maybe the output pole is not the dominant pole. So, we need to know the output impedance. Am...
Hi szekit, thank you for you information.
But I just think about the output impedance of chargepump. For example, if R0 is output impedance of chargepump, R1 is load, C is output capacitor, then I think the output pole's frequency is " f=1/(2*pi)/(R0||R1)/C", isn't "f=1/(2*pi)/R1/C". How do you...
Hi, I'm doing a chargepump doubler regulator. I want to analyze the loop stability.But I'm confusing in the output pole of the system.
Anyone know how can I calcultate the output pole frequency? Does it only ω=1/RL*CL(RL is load resistance, CL is output capacitance), or should include the...
Hi, I would like to talk about the output pole. How do you guys think about the output pole? Does it only output RC load? Why doesn't it include the output impedance of chargepump?
Thanks!
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