All Questions
Tagged with compensation feedback
19 questions
0
votes
2
answers
130
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Analog Compensator Vs digital Compensator in Power electronics Converter
I was working on designing a feedback compensator for my buck converter. I decided to use the compensator circuit in the feedback and give its output to Arduino which gives the duty cycle as shown ...
- 693
0
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0
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48
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Feedback compensation on a buck-boost led driver
I tried to calculate the compensation network for a TPS92692 in buck-boost topology and I can't find the same value for the typical buck-boost led driver (page 41 of datasheet).
Section 9.2.2.2.12 ...
- 83
3
votes
2
answers
333
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How feedback loop is done in wide voltage range laboratory power supply? TL494 compensation
Hello i would like to ask how is compensation done on switching PSU with wide range variable output voltage (from zero to several hundres of volts). I have succesfuly (I guess) simulate my own design ...
- 135
0
votes
1
answer
136
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Why are there two different feedbacks in this battery simulator design?
I am trying to understand this LT1970 Battery Simulator Design and I could not figure out what is the point of two different feedback legs in this circuit? I have tried AC analysis but could not get ...
- 39
0
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2
answers
335
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Tricking feedback of a buck converter
I need to trick the buck converter feedback. The converter that I am going to use is TPS40192DRCT.
Instead of the regular resistor divider, I want to feed there voltage proportional to current ...
- 1,395
0
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0
answers
56
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Isolated Type 3 Compensator
I'm trying to build a full bridge dc-dc converter and planning to apply a type 3 compensator(voltage mode). When I check the isolated feedback type 3, I've read some comments indicate that it's hard ...
- 319
0
votes
1
answer
497
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DC Gain of the System
I'm trying to design a feedbcak loop compensator and I'm following the instructions on power supply cookbook.
Book has calculations for DC gain like equations below:
in my situation Vin: 40V-60V and ...
- 319
1
vote
2
answers
144
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Compensation of custom high voltage power supply
To test an offline switching PSU I decided to build a custom isolated high voltage variable PSU. The idea was to build a nice, small, low power equivalent of a variac and isolation transformer that is ...
user194170
0
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0
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148
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How to determine these resistors in 2-pole 2-zero feedback loop compensation
I'm trying to build a 2-pole 2-zero feedback loop compensation for controlling a full bridge dc-dc converter. It's my first time doing this and I'm following the book power supply cookbook. Book is ...
- 319
2
votes
1
answer
2k
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Implementation of Adjustable Current Limiting Circuit
I have a circuit that can deliver 0-10V and 0-100mA to a load, and want to have an adjustable current limit that will limit the current delivered. To do this I have a current shunt that I monitor, and ...
- 2,369
1
vote
0
answers
526
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Type 3 Compensation on Full Bridge DC-DC Converter with SG3525
I'm trying to build a 48V-400V full bridge dc-dc converter. I'm using sg3525 as pwm IC and trying to get isolated feedback from output and planing to do it with TL431.
When I study on it people are ...
- 319
1
vote
1
answer
695
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Analog implementation of imaginary roots in a transfer function
I have a simple boost converter, and from multiple papers I've read through, a Type 3 Compensator is recommended. I designed one in Matlab/Simulink, and it reacts very quickly. The problem is, when I ...
- 311
1
vote
1
answer
879
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Op-Amp's Dominant-Pole Compensation
I'm reading "Op Amps for everyone" (http://web.mit.edu/6.101/www/reference/op_amps_everyone.pdf) and I'm currently studying the chapter about the compensation of op.amps. but I'm missing a passage. At ...
- 382
9
votes
2
answers
4k
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Calculating values for compensation network (boost converter RC+C network)
I'm trying to build a boost converter with current mode PWM control, but I'm stuck at selecting capacitor and resistor values for compensation. I'm using a LT1619 as the controller IC:
simulate this ...
- 1,428
2
votes
1
answer
2k
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Input Bias Compensation for a Comparator
I've been working on designing a discrete dual-slope ADC for school, and I've run into a problem. The schematic below shows my proposed input stage, an ideal integrator connected to a comparator. I've ...
- 1,341
3
votes
2
answers
2k
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Finding transfer function of a compensator circuit similar to a type 2 compensator topology
I know how to find transfer functions of op-amp circuits using equations derived from using Kirchhoff's current law (nodal analysis), and normally I don't have any problems solving them. However, I ...
- 311
7
votes
1
answer
436
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Should I be concerned when loop gain rises back above 0dB on simulation?
Interim update
Okay, I just realized I screwed up on the simulation. When I added \$C_{bp}\$ I upset the "break" in the feedback loop necessary to get the loop gain. The left-side lead has to go to ...
- 7,152
0
votes
1
answer
278
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Feedback Gain Loss of Transimpedance Amplifier
I have designed a single-supply (3.3V) potentiostat that initiates electrochemical reactions, converts the generated electrochemical current into a voltage via a transimpedance amplifier (op-amp used ...
8
votes
2
answers
4k
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Why do we compensate PWM controllers?
I have been studying switch mode power supplies for a while. I have understood the working principle of several common topologies But there is a detail in the control circuit structures which I still ...
- 14.2k