All Questions
Tagged with dc-dc-converter boost
333
questions
3
votes
1
answer
211
views
Boost converter does not work according to the theories
I am still a beginner in this field so I would like to gain some insight about boost converters. I wanted to build a boost converter for a school project with this simple design. The parts were ...
- 33
0
votes
1
answer
55
views
LTspice AC/DC converter with DC/DC boost converter
So this is my first time using LTspice and I need to convert my (AC) Vin 11.5V to DC and then boost DC voltage to Vout 22.5V. I have a few givens and some I needed to calculate. I am struggling to ...
2
votes
0
answers
95
views
Constant current feedback op-amp analysis
Above is the schematic for the convoy XHP35 flashlight driver. As you can see, the current control loop uses the op-amp as a comparator between a setpoint (low-pass filtered PWM output from a ...
- 407
1
vote
1
answer
62
views
Voltage drops when trying to get high current from boost converter
I have designed a Boost converter which boost 5V input to 12V output. I designed it using TPS61378 boost converter IC by Texas instruments. I was able to get around 450mA current from the output ...
- 49
2
votes
1
answer
55
views
How can I improve the feedback portion of my boost converter circuit?
I designed this boost converter to drive vacuum florescent displays, nixie tubes, and similar devices.
It can drive a 10k Ohm load at 235V. I'm sure I can get away with larger loads as alot of the ...
- 69
0
votes
2
answers
62
views
Op amp as a comparator output turning partially high when it's supposed to be low
I'm using an AD823 op amp, as a comparator as part of a feedback loop in a boost converter. Although the boost converter and feedback portion functions as desired, the problem is when I check the 13 V ...
- 69
0
votes
1
answer
67
views
Can one CC boost LED driver be used for 2 different loads separately?
I have a constant current boost LED controller (TPS92691) which I am designing to output 4A switching between two LED strings. This is with a 2S lipo battery. One string has a stack forward voltage of ...
- 407
0
votes
2
answers
39
views
Does a current sense resistor not always mean a constant current output for dc-dc converter?
I've had a understanding that having a current sense resistor feeding into sense pins or a feedback pin meant that the inductor current was changing wrt the variations across sense resistor, hence ...
- 407
0
votes
1
answer
23
views
Apart from MOSFET selection what else determines max output current for LED controller IC?
TPS92691 is a LED controller, not a monolithic IC which has an integrated FET. Hence, I'm curious why the landing page for this part (https://www.ti.com/product/TPS92691) mentions that Iout(max) is 5A ...
- 407
0
votes
1
answer
35
views
Creating higher voltage from DC motor
I have a DC motor (5 V, 600 rpm). I use it as a generator. It produces near 1.5 V max.
This voltage may differ while using it in the application and I can't control it. I want to raise this voltage to ...
2
votes
1
answer
133
views
How does \$R_{ISET}\$ work in this Boost Converter?
I'm trying to design a boost converter for a backlight which has Vf:10.6-13.6V, If:140mA
I picked AP3031, I did steps required to find component details e.g Inductor Value, Iswmax
So far I understand....
- 89
0
votes
0
answers
32
views
Does current mode control for dc/dc conv imply a constant current output?
I am getting very confused, I have read articles about current mode and voltage mode control, and it seems that most converters use current mode control - which seems has two nested control loops. The ...
- 407
1
vote
3
answers
78
views
For a high powered LED loads, is a buck or boost converter more efficient / simpler?
I have a 3 high powered LEDs hooked up into a strip to for the load. For simplicity, I am going with a constant voltage driver. The load can be hooked up in 2 configurations:
Config 1:
3 Green LEDs (3....
- 407
0
votes
2
answers
108
views
Power Converter Average Modelling
This image is from Christophe Basso presentation. It has been mentioned in the slide that average model can predict the transient response but I have one question when we say average model then it ...
- 119
4
votes
3
answers
152
views
LM27313 boost converter failure
I am trying to assemble a boost converter using the LM27313 (datasheet link), following the reference design and calculations given in the data sheet. The load is 6 white LEDs (Vf=2.95V) in series.
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