Question regarding Constant Current Modeling of Buck

AI Thread Summary
The discussion centers on confusion regarding the transfer function of a parallel RC circuit with equivalent series resistance (ESR) driven by a current source, specifically why it is characterized as a 1-pole system. The original poster believes their calculations indicate the presence of both a pole and a zero, contradicting the application note referenced. Participants are encouraged to share their own transfer function results and insights from the application note for clarification. The goal is to resolve the discrepancy in understanding the circuit's behavior. Further analysis and shared calculations are sought to clarify the situation.
Dextrine
Messages
102
Reaction score
7
Hello everyone,

I was reading this application note and I am having trouble understanding how a parallel RC circuit with ESR bring driven by a current source has a transfer function of 1-pole. When I do my math I get a pole and a zero.

I have attached an image of the claim that there's 1-pole as well as the link to the AN.

Thank you all very much.

http://cds.linear.com/docs/en/application-note/AN149fa.pdf (Page. 11)
 

Attachments

  • CurrentModel.JPG
    CurrentModel.JPG
    32.1 KB · Views: 479
Engineering news on Phys.org
can you provide us with more info. what did you get for a transfer function. what did they get...
 

Thread '3-terminal device external modeling'

Very basic question. Consider a 3-terminal device with terminals say A,B,C. Kirchhoff Current Law (KCL) and Kirchhoff Voltage Law (KVL) establish two relationships between the 3 currents entering the terminals and the 3 terminal's voltage pairs respectively. So we have 2 equations in 6 unknowns. To proceed further we need two more (independent) equations in order to solve the circuit the 3-terminal device is connected to (basically one treats such a device as an unbalanced two-port...
View full post »

Thread 'Question about the voltage between two charged capacitors'

suppose you have two capacitors with a 0.1 Farad value and 12 VDC rating. label these as A and B. label the terminals of each as 1 and 2. you also have a voltmeter with a 40 volt linear range for DC. you also have a 9 volt DC power supply fed by mains. you charge each capacitor to 9 volts with terminal 1 being - (negative) and terminal 2 being + (positive). you connect the voltmeter to terminal A2 and to terminal B1. does it read any voltage? can - of one capacitor discharge + of the...
View full post »

Similar threads

Trouble building a Buck Converter
Replies
14
Views
2K
Building a Buck Converter Using the LT1170
Replies
10
Views
2K
Constant Current Source in Driving an RC Circuit
Replies
6
Views
8K
ABC reference frame synchronous generator modelling in Ltspice
Replies
1
Views
3K
Neuron Electrical Model, time constant
Replies
1
Views
4K
Constant current source advice
Replies
31
Views
5K
Single Phase Transformer Losses -- Hysteresis, Eddy Current Constants
Replies
4
Views
3K
Current regulation for buck converters?
Replies
13
Views
5K
Identical Batteries in Parallel do not Draw Same Current, Non-Ideal?
Replies
7
Views
838
Trying to calculate the peak current of a Capacitor bank
Replies
15
Views
5K

Hot Threads

Recent Insights

Back
Top