All Questions
Tagged with dc-dc or dc-dc-converter
2,789 questions
0
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2
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Impact of Input Capacitor on the Derivation of the Small-Signal Model of the Buck-Boost Converter
I have been studying the control methods of DC/DC power converters over the past couple of weeks and am confused on how the addition of an input capacitor affects the small-signal model of the buck-...
0
votes
1
answer
30
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MP2315s buck converter not working
I made a buck converter using MP2315s, and when I tested the final product it didn't work like it should be dropping 12v to 5v. Tested and no output
I input a 12v to the input of the PCB, and the ...
- 1
2
votes
3
answers
295
views
How to Keep a Constant Output Voltage While Using MPPT?
I wanted to design a solar energy management system that utilizes a 12-volt, 60-watt solar panel to charge two 12-volt, 12 Ah batteries efficiently. The system is aimed at optimizing energy storage ...
- 31
0
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0
answers
74
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How to Measure the Frequency Response of a Circuit with Current Feedback Using Bode 100?
I want to use the Bode 100 Vector Network Analyzer to measure the frequency response of my circuit. I understand that with voltage feedback, a typical injection transformer can be used at the feedback ...
- 89
2
votes
2
answers
167
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Converting the output of LT8292 to negative value
I want to design a variable output DC-DC converter to convert 12V to -1V to -20V at 4A, would you please let me know if I can make changes on the following schematic to achieve this (LT8292)?
If not ...
- 1,144
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votes
1
answer
48
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Can a boost converter output different voltage levels according to the reference voltage?
Is it possible to design a boost converter such that the boost converter outputs different voltage levels according to a reference value?
- 165
1
vote
0
answers
50
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Mode Switching Challenges in MPPT and CC-CV Converters for Battery-to-Battery Charging
This project involves the design of a system that enables energy storage and transfer between two 12V, 12Ah batteries using a solar panel as the energy source. The system utilizes a 12V, 60W solar ...
- 31
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0
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26
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How do I create the switching signals for my DAB converter?
I am currently designing a DAB converter (work in progress) and I'd like to know if there is an easier method for driving the switching signals than the method I have below using a TC4425AVPA to ...
1
vote
1
answer
62
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How concerned should I be about the level of EMI generated by simple isolated DC-DC converters?
I'm in the early prototyping stage for a system that integrates with DMX512. One of my design goals is to make the DMX interface extremely robust. To that end I'm going to be using THVD2410, which is ...
- 11.1k
1
vote
1
answer
66
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Designing DC-DC buck converter based on the L6981 (L6981C50DR)
I will start by a small description of my system (I will omit any irrelevant information).
The DC DC buck converter that I am designing based on the L6981C50DR serves as the bridge between a smart ...
- 23
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0
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56
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Design a Ćuk converter architecture for converting 12V to a variable output ranging from 0V to -10V
I did a research about the best architecture for DC-DC convertors for having the minimum output ripple and then I noticed I should use Ćuk architecture. So for example the following controller can ...
- 1,144
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1
answer
53
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-48V to +5V using LT1072HV, output is 5.5V instead of 5V
I want to convert -48V DC fromtelecom power to +5V DC, I'm considering this schematic:
Sometimes rectifier output of telecom is -54 DC,hence I'm considering this schematic for -40V to -60V input.
I'...
0
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0
answers
26
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Can I use uc3843 ic for buck converter for charging of battery from solar panels
I want my solar panels to increase the amp why voltages decrease, so I want a buck converter using uc4843 for my project so I need more information about that
-1
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0
answers
26
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DC-DC configuration in series parallel
I have four DC-DC boost converters labeled C1, C2, C3, and C4. Each converter has the following specifications:
Input Voltage Range: 8.5V to 50V
Output Voltage Range: 10V to 60V (adjustable)
Maximum ...
0
votes
4
answers
90
views
Designing a variable negative output voltage converter with low ripple
I want to design a variable output regulator to convert 12V to -10V to 0V @1.5A.
My idea is to convert 12V to -10V using an LTC7149:
I have 40mV ripple at 1.5A. I need to reduce this ripple as much ...
- 1,144
3
votes
2
answers
139
views
Why do flyback transformers have such a large Primary Inductance when the design really only needs a fraction of that inductance?
I am working on a flyback converter design. I am new to this type of topology and I am trying to learn the fundamentals. The converter I am designing for is 120 W, with 24 Vdc @ 5 A output. The input ...
- 71
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3
answers
104
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Generating ±10V(1.5A) from an 11V input
I want to make ±10V (1.5A) from an 11V input, I found the following design (LTC3260), but the issue is that it can make 100mA max, so one solution would be I can make several of these in parallel, ...
- 1,144
-1
votes
1
answer
49
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Comparative Analysis: IC Buck Converters vs. General Buck Converter Schematics [closed]
I am working on correlating the schematic of an IC-based buck converter with the design principles and structure of a general buck converter circuit.
Based on the schematic I created, all critical ...
- 1,144
0
votes
1
answer
68
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EMI filter design for a DC-DC converter
I am doing an EMI filter for a step down flyback DC - DC converter 20 V to (20 V and 10 V) multiple outputs. The controller used here is UC3842. I have the following questions for making this EMI ...
- 155
-1
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0
answers
29
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Fuse and reverse ploarity protection for -48V (telecom power) to +5V
I want to get -48V (telecom power) to +5V, I'm considering this schematic:
I've added dc 1A fuse in -48V input line and diode forreverse polarity protection in +48V which is GND in LT1082. Will this ...
2
votes
1
answer
272
views
Power issue with PCB board using a DC-DC converter
I am encountering a technical issue with a circuit I recently assembled. The circuit includes an nRF52832 microcontroller module (MDBT42Q), a 1.8V voltage regulator (LDLN025M18R) for powering a sensor,...
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1
vote
1
answer
115
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Issue with a DC-DC boost converter
I have designed a variable-output boost DC-DC converter (LM5158RTER) to step up 5 V to 40 V. After receiving the PCB, I noticed that the output is fixed at 4.98 V, even when adjusting the ...
- 1,144
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0
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63
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How to get or convert to +12V from -48V telecom power supply rail
I want to convert the -48V from rectifier output of telecom equipment to +12V DC.
I'm considering the following schematic for that purpose:
The rectifier controller has -48V DC and +VE DC bus bar, ...
0
votes
0
answers
43
views
How to connect a switching power supply to a converter with 2 inputs and a BMS?
I am building a circuit for an EV with a capacitor and need help connecting the switching power supply with the BMS and converter (The highlighted part). The switching power supply needs to be ...
-1
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0
answers
42
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Cascading two boost converters [duplicate]
I have assembled a cascade converter circuit. My main goal is to accumulate a voltage of 80 volts on a C6 1000 µF capacitor in about 6-8 seconds. The problem is that I am using a 3.7 V battery. If I ...
3
votes
1
answer
95
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LT3966 buck converter design
I have designed a PCB using the LT3966 to drive multiple LED strings. The buck topology in particular seems puzzling to me. The datasheet only has one buck application circuit and does not delve into ...
- 79
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votes
2
answers
74
views
48V to 12V dc stepdown using TIP35C and 7812
From rectififer output of telecom equipments, 48V DC, I want to convert it to 12V DC. I'm considering this schematic:
Can this schematic convert 48V dc to 12V dc? Please recommend me for corrections.
0
votes
1
answer
78
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DC-DC converter step-up double stage cascade
i made a cascade dc converter using mc34063 but using an external transistor, my main goal is to charge the capacitor at the 2200uf output in about 5-8 seconds, the input voltage is 3.7 ideally when ...
1
vote
1
answer
57
views
Is it possible to improve the rising-slope of a buck DCDC converter?
I designed a DCDC converter that accepts an input voltage between 14 V and 18 V and outputs 3.3 V. Here the schematic:
It works fine but I had a problem with a couple of sensors. The manufacturer ...
- 1,450
0
votes
3
answers
81
views
Connection help for DC-DC converter R2D-0524
I want to use R2D-0524 in my circuit, I will input a voltage of 5V to it, and expect to produce ±24V output. But I am confused about its COM pin.
This is the link for this converter.(https://www....
- 1
0
votes
1
answer
58
views
Forced CCM Buck Operation
I bit confused regarding ripple voltage comparison for forced CCM mode buck converter and asynchronous buck converter in DCM. Which case we will have higher ripple voltage?
Next question, when should ...
- 119
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votes
1
answer
104
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Understanding primary current in half-bridge push-pull converter
I am currently investigating a half-bridge push-pull converter and I am struggling with understanding what I see on the oscilloscope. (And why it keeps blowing up).
So for the circuit, its as basic as ...
- 191
0
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0
answers
34
views
Adjusting the negative output voltage of a bipolar step-down converter in Proteus
I'm working on designing a bipolar step-down DC-DC converter with a +12V input, targeting ±5V outputs. I'm using flying capacitors for the configuration, and I'm modeling the circuit in Proteus 8.17 ...
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votes
2
answers
102
views
Powering STM32 Directly with a DC-DC Converter: Considerations and Recommendations
I'm a bit concerned about directly powering an STM32 with a DC-DC converter. For a project, I want to supply 3.3V at 20mA from a 12.6V 55mA power source, and I’m considering using a DC-DC converter ...
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0
votes
2
answers
59
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Issue with understanding the frequency response of an open-loop flyback converter
I am trying to simulate the frequency response of a flyback converter circuit as shown below to verify the location of the poles and zeros.
Attached below is the frequency response obtained after ...
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0
votes
1
answer
42
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What is the "Forward voltage drop of the ringback rectifier" in an impulse power supply IC?
I have been looking at various impulse power supply ICs and most of the ones that I've found (e.g. MC34063A: https://www.rcscomponents.kiev.ua/datasheets/MC34063A.pdf) require me to know a value of ...
- 3
0
votes
1
answer
57
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Trying to build a buck converter with LM2576 Adjustable
I'm trying to build 12V buck converter based on this schematic
this is what I did
Is this already good enough, or does it need some more change?
this is my first trying to build something like this ...
5
votes
2
answers
260
views
Help calculating and simulating buck converter
I want to simulate a DCDC buck converter to go from 6V to 3.3V, with a max. output current of 100mA.
I'm using this buck converter online calculator to find out the values I need. This is the results ...
- 1,385
0
votes
2
answers
50
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Higher or lower input voltage for my dc-dc step down buck converter?
I've searched the web and didn't find an answer that suitably answers my query.
I have a dc-dc buck / step-down converter. Input range: 72-144 V DC. Output: 5 V 60 A.
My question: Is there a ...
0
votes
0
answers
33
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DC-DC voltage converter design advice
I am planning to build a DC power source for EDM/plasma polishing.
Both processes require a DC power source with difference being that plasma polishing needs voltage to be 300 to 400 DC
and for EDM ...
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1
vote
1
answer
46
views
NTC inrush current limiter steady current rating
I understood most of parameters to choose NTC inrush current limiter, but couldn't understand steady current concept. In particular, how voltage comes into play.
For NTC to work as designed it has to ...
- 314
1
vote
1
answer
119
views
Type 3 compensator for forward/buck converter
I am trying to build a isolated forward converter with voltage mode feedback. For some reason, I am unable to achieve required crossover frequency. To simplify everything, I have change the circuit to ...
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1
vote
2
answers
30
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MPPT setpoint buck battery charger IC operation and input/output voltage
I am trying to understand how CN3795 by Consonance works. CN3795 is
a PWM switch-mode multi-chemistry battery charger controller that can
be powered by photovoltaic cell with maximum power point ...
2
votes
2
answers
141
views
Troubleshooting voltage drop in dcdc power supply when driving load through H-bridge
I have designed a DC-DC power supply with an output voltage (Vout) of 1.6V and a current (Iout) of 8A.
When I connect this supply directly to a large load, it works fine.
When I use the same 1.6V ...
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1
vote
0
answers
39
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AL8853AQS boost dc-dc converter malfunctioning
I've assembled a boost converter using the AL8853AQ (datasheet). The load is 6 white LEDs, at ~400mA. String voltage is about 34V when cold, dropping to about 31V when hot. The assembly worked without ...
3
votes
1
answer
244
views
Control to output transfer function
I am trying to derive control to output transfer function of phase shift full bridge converter.
Applying small signal analysis, I reach to the point/schematic as shown in the picture below:
Document ...
- 730
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1
answer
56
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Output LC filter transfer function
I was trying to construct small signal analysis for phase shift full bridge converter. Below is the point that I reach.
According to the document, the transfer function of the output filter is given ...
- 730
0
votes
2
answers
51
views
DC/DC converter topology identification
Can you help me to identify the converter topology in the attached schematic?
Is it a resonant converter?
It looks similar to forward converter, but without the LC filter and with 2 extra capacitor.
...
- 21
0
votes
1
answer
70
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DC-DC bulk converter: Build a module or buy off the shelf
I have two stepper motors onboard with two stepper drivers to control them, two endstop sensors, an esp32-c3-devkitm-1 to control the system, a smart battery powering all the system and finally, which ...
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5
votes
4
answers
1k
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Do I need a fuse for each device connected to an AC-DC power supply?
I have 14 single board computers (SBCs) that each require 5 V, 5 A DC power. I have a 5 V, 60 A power supply that I want to use to power 12 SBCs. I also have a 12 V to 5 V 20 A DC-DC converter which I ...