All Questions
Tagged with buck buck-boost
41
questions
0
votes
0
answers
33
views
Current sensing in DC-DC converter
I studied DC-DC converter in peak/valley/average mode control and I have a question about the methodology to sense the current in average current mode control. I saw lot of paper about DCR sensing but ...
- 324
3
votes
6
answers
1k
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What is an intuitive explanation on how a buck and boost converter transfer energy?
I can understand how a buck converter can step down the voltage but only with the formulas. I am struggling to understand intuitively how the inductor stores energy and releases it in a way so that ...
- 31
5
votes
2
answers
285
views
Non inverting buck boost transfer function
When considering the compensation of a non inverting buck boost (single inductor), the datasheet considers to take into account the worst transfer function between the buck transfer function and the ...
- 2,478
2
votes
1
answer
322
views
Identification of IC used in Pololu 5V, 5A Buck Converter (my2101 330)
I have identified the chip on the Pololu 5V, 5A buck converter as my2101 330, but I am having difficulty finding information about this chip on any platform. I've checked the Pololu resources page (...
- 903
7
votes
3
answers
801
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What technical progress enabled high-efficiency charge pumps?
I found a lot of information on the internet, most of which told me that charge pumps are only suitable for low-power scenarios and they are not very efficient.
Charging ICs based on the charge pump ...
- 73
0
votes
2
answers
1k
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Calculating inductor value for my buck converter [duplicate]
I'm trying to understand the SMPS operation.
The goal is to select inductor (L1) & capacitor (C1) values that satisfy the working condition below:
V1: 22-26 V range.
Power supply required: 1 A.
...
- 13
1
vote
0
answers
62
views
Synchronous buck battery charging circuit using totem pole gate driver
Background - We are trying to develop a very low cost buck (day time)/boost (night time) converter for charging LFP batteries (day time) and powering LED (night time). Due to cost impact we are trying ...
0
votes
1
answer
319
views
What role does the inductor and output capacitor play in a buck converter? [closed]
What role do inductors and capacitors play in buck converters?
I know it acts as an LC low-pass filter.
What other role does it have? When the switch opens, does the capacitor discharge in the load? ...
- 17
5
votes
2
answers
2k
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Idea behind current mode control in DC-DC converter
I am learning about control strategies for DC-DC converters.
While I find voltage mode control easy to understand, I struggle to understand
current mode control.
Is the idea here to control the ...
- 67
0
votes
1
answer
212
views
54 V to 5 V using LM2576HV
I have a requirement to convert 54 V battery output to 5 V. My battery's positive terminal is grounded. I tried the connection as mentioned in the datasheet which is attached here, but as soon as I ...
- 133
2
votes
1
answer
581
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Buck-Boost Converter Inductor Value
I am designing a typical buck-boost converter using the LTC3530EMS#PBF IC from Analog Devices.
My design specs are as follows:
Vin: 3.0V - 4.2V
Vout: 3.3V
Iout(max): 300mA
Fsw: 1MHz
In the datasheet, ...
- 868
1
vote
1
answer
268
views
What is the min and max input voltage range of a buck converter to maintain efficiency above 90% [closed]
I want to design a stepdown converter from 72V lithium ion battery to 12V, 5A. I am torn between using a flyback converter and a buck converter. Which topology will give me maximum efficiency at that ...
- 103
0
votes
1
answer
284
views
DC -DC buck converter W/o PWM signal( kind of)
Hey so i'm new to electronics and I've tried constructing a buck converter (using software only) circuit without the use of an external PWM source (microcontroller, 555 circuit) and i came up with ...
- 633
1
vote
2
answers
2k
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How to improve buck converter's efficiency
I am designing a buck converter for 600 - 10V converting (60 times lower than input).
My first question - is this even possible? I've seen a 650 - 40V converter on mouser, but that is the best that I ...
- 1,039
0
votes
1
answer
605
views
1200w dc-dc boost converter low voltage protection not working
I've purchased a 1200w dc-dc converter with the model number SZ-BT07CCCV.
I'm using it to convert 12v from a big battery to 24V.
the converter comes with three potentiometers according to the ...
- 103
1
vote
0
answers
76
views
Buck boost converter inductor rating
I am designing a buck boost converter with a 12v output, and 50A current output.
The input range is 8v-14v from a supercapacitor. However based on the Texas Instrument buck boost design sheet Basic ...
- 11
0
votes
0
answers
134
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on/off pin problems with the LM2678 5.0
PCB:
My name is Ertuğrul. I made a regulation board with an LM2678 but I have a problem: I provide 12V input but I can not get 5V output.
I only get 5V with the on/off pin enabled, but the datasheet ...
1
vote
1
answer
259
views
Is there a mathematical representation that represents the output voltage of a buck or boost converter in discontinuous mode?
Recently I have learned that in buck or boost converters, the output voltage depends only on the duty cycle and input voltage in continuous conduction mode or when current is continuous. However, in ...
- 469
0
votes
2
answers
2k
views
How does a boost converter allow for a gain in output voltage by just switching the positions of the inductor and switch?
I get that in a buck converter, a low pass LC circuit was attached and this effectively filters out high frequencies. If the bandwidth is configured so that it is lower than the switching frequency, a ...
- 469
2
votes
1
answer
2k
views
Why overshoot happens in Inductor voltage in an open loop DC-DC buck converter?
I am extremely confused about why this overshoot occurs in the Inductor voltage waveform in buck converter and also why the time to achieve steady state reduces on increasing the load resistance.
...
- 23
0
votes
0
answers
108
views
Buck converter with current and voltage regulators
I need to find scheme for Buck converter with adjustable output voltage from 0 up to 12V. Also it may have an adjustable current limit. Max current output is 10A or at least 5A. Actually I will need ...
- 1
0
votes
0
answers
469
views
Buck-Boost Converter Modeling
I wanted to perform AC analysis for a buck boost converter using SIMetrix/SIMPLIS for simulation, using this simulator the designer does not need to the average model to get the frequency response of ...
- 1,020
1
vote
0
answers
2k
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Optimizations for LM2596, Positive and Negative Voltage
I'm working with the LM2596 to get a positive and negative voltage using two separate IC for each. I'm having trouble optimizing them for a 1 A load. I followed along with TI's WEBBENCH designer to ...
0
votes
2
answers
183
views
Through hole buck-boost ic [closed]
I'm looking to create my own buck-boost converter but want to test it on a breadboard. I have done online searches but only surface mounted ICs show up. The Texas instruments TPS63061 looks ideal for ...
- 1
3
votes
2
answers
199
views
One step-down regulator 24 V to 1V or two step-down regulators with lower steps?
I am trying to design a working principle scheme to step-down the input voltage from 24Vdc ---> different low voltages (1.8 V, 1 V, 1.5 V, 3.3 V with ripples ~ 1%).
Could you kindly explain me the ...
- 59
12
votes
3
answers
1k
views
Why are boost/buck converters never fully integrated/all-in-one?
Moving from small arduino applications to higher-power applications for work, I've had to switch from using simple linear regulators to switching boost/buck converters any time a different voltage to ...
- 688
1
vote
2
answers
365
views
PWM-Switch Model of a Cascaded-Buck-Boost
Im trying to develop the PWM-Switch Model of a Cascaded-Buck-Boost.
First of all i want to extract the Large-Signal Transfer function for the Buck-Mode.
I'm working through the book "Switch-Mode ...
- 165
1
vote
0
answers
74
views
Modelling DC/DC-Converter
i want to model a cascaded Buck/Boost-Converter with FAST like mentioned here: https://cbasso.pagesperso-orange.fr/Downloads/PPTs/Chris%20Basso%20APEC%20seminar%202013.pdf.
The goal is to implement a ...
- 165
0
votes
1
answer
745
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State-space model of a buck converter in DCM
I have a problem getting the state-space representation of a buck converter in DCM.
There are two switch cycles between one period.
If the switch is closed the circuit looks like this:
After ...
- 165
0
votes
1
answer
500
views
Ramp compensation for UC1843 and UCC38C44
When we pick up the datasheets of UC1843B-SP and UCC38C44, we notice that they have the same functional block diagram, specially the PWM generator circuit (Error amplifier, current sensing PIN and the ...
- 1,020