Questions tagged [buck-converter]
A switching converter that steps down an input voltage with the usage of internal or external switching circuitry. Has high efficiency when compared to linear regulators.
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Connecting Grounds of Buck Converter to Circuit
You are usually told to tie both grounds of the buck converter together (non isolated), on the input and output sides. When I attempt this with a model in falstad, I get a wire loop condition. This ...
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Differential signs in schematic in a DC_DC convertor on FB and VSNS- pin
I'm working on a DC-DC convertor Buck architecture as follows (PTPS548A28RWWR):
I noticed something interesting: there are differential symbols on the FB and VSNS- pins as follows and they have also ...
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Is this buck/boost layout good?
I have this PCB layout with two TPS631011 buck/boost converters. I just wanted to know, whather thelLayout is good or if there is anything I should change before manufacturing this board.
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Switching regulator issues?
I'm trying to use a switching regulator (ptr08060w) to step 12V DC down to 2V DC, however it is not achieving this at all (even with no load connected), and is outputting a voltage that varies ...
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Buck Converters? [closed]
All I need to do is step-down my 12V power supply to 8V to power an Arduino, and I've been told a buck converter is the easiest way to do this; I see some buck converters online that look like this:
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PWM buck converter using IRFZ44N and BD139 [closed]
Please help me with this circuit diagram
I need to design a adjustable voltage supply 0-20V.
For that I want to use this circuit but somehow it's not working in my case. the PWM signal was generated ...
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Derivation of the AC small-signal circuit and the canonical form of a DC-DC buck converter
I'm new to this forum and hope you can help me. I am in the process of designing an input filter for a DC-DC step-down converter 12V-5V/1A (Pic.1).
I am trying to determine the transfer function and ...
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Inductor selection for a buck converter with uncertain output current [closed]
I'm struggling to choose the correct value inductor for my design with a TPS54331. Based on my estimations, I calculated a DC current consumption of 1.3 A for my circuit, but sometimes the circuit ...
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Why is the filter capacitor (used to filter pulsing DC) overheating MOSFETs in a buck converter?
I am trying to create a microcontroller (Arduino) based DC to DC buck converter with CC and CV features. For now, I am using a 20 V 5 A input source. Output voltage (target voltage) is settable by the ...
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Persistent ripple at the buck converter output
I developed a half-bridge buck converter, I did all the steps, from the converter calculations, such as accommodating the copper in the appropriate ferrite core, wire gauge diameter, etc., my project ...
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Buck Converter Coss Loss Equation [closed]
Why is the LS output cap not accounted for the loss due to output capacitance (Coss)?
In my mind, the LS cap is being charged by the pmoss, just as the HS cap is being discharge by the PMOS. For ...
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Can i connect two DC-DC buck converters 48V>24V in parallel to increase the current? [closed]
can i connect two DC-DC buck converters 48V>24V in parallel to increase the output current?
I have one 20A already but it shuts off by overload. The Load is sometimes 30A so im considering to ...
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Verification of Initial Conditions in an RLC Circuit (buck converter, output voltage)
I had drawn the following circuit (note that all components are ideal and european standard):
Suppose the following Situation:
\$t<0\$: The MOSFET was open for a very long time
\$t=0\$: The ...
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Average Model of Buck Converter
I am trying to understand average model of Buck Converter for Peak Current Mode Control Topology. Below is a snapshot taken from the Christophe Basso Webpage https://powersimtof.com/Spice.htm, from ...
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Verification of Initial Conditions in an RLC Circuit (buck converter, inductor current)
I had drawn the following circuit (note that all components are ideal and european standard):
Suppose the following Situation:
\$t<0\$: The MOSFET was open for a very long time
\$t=0\$: The ...
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0
answers
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Middlebrook Stability Criteria for Input Filter
I am trying to apply Middlebrook input filter stability criteria for Active clamp forward converter .So for finding Input filter output impedance over the frequency range is quite straight forward in ...
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Closed Loop Buck-Boost converter, no load condition
My question is how can I close the loop with no load condition of my buck-boost converter, by using peak limiting current mode control? Is the bleeder resistor needed or is it possible just to close ...
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Average Model of Peak Current Mode Buck Converter
I am trying to understand average model of Buck Converter for Peak Current Mode Control Topology. Below is a snapshot taken from the Christophe Basso Webpage, from file “PWM Switch LTspice: Mark ...
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Peak Current Mode Control Buck Converter Slope Compensation Info From datasheet
I am working on Buck Converter design based on LT8642S controller and trying to do average modelling ,so I contacted manufacturer regarding slope compensation info and they responded below.
"The ...
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Power Board Optimization
I've created a buck converter schematic that converts an input voltage of around 16.8V to 5V at 8A using the Sic477 buck converter. You can see my design below. While it produces the correct output ...
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Need for current protection on low current digipot
Context:
I am designing a power control system for a 24v 300w halogen lamp and to do this I am taking a stock buck converter Here with current and voltage control, removing two potentiometers and ...
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Replace battery by DC source (USB 5V)
I bought a Bluetooth audio receiver which is powered by 3.7V Li-ion battery. I tried to replace the battery source to a USB 5V with a buck converter and I managed to achieve it, here is my work around....
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Peak current-mode controller
I am studying a peak current-mode controller, and here is the schematic without slope compensation:
Before introducing RSENSE to the design, I understood that if feedback voltage increases, it is ...
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Designing a DIY low level light therapy device (LLLT)
I am designing a low level light therapy (LLLT) device similar to the one in this video.
Mine will be smaller using twenty each (for a total of 40) of two kinds of 3W LEDs:
2.4V 0.6A -- 660Nm red
1....
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LM2596 Not Outputting Voltage
I'm making a PCB that will use a Buck Converter (LM2596) to step down the voltage from 12V to 5V. When I supply 12V to the PCB it gets fed into the LM2596 but the output is coming out to be around ...
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Problem with circuit--ESP showing invalid packet header on powering the robot on by battery
I am trying to build a self-balancing robot, the circuit of which I have attached here. Now I am facing an issue, which is when I power the ESP via the 5V buck convertor output, the ESP gets corrupted ...
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Low Solar Panel Voltage Vmp Operation
so I'm currently working on an MPPT project using Asynchronous Buck Converter with the design :
Capacitor Input : 470uF/100V
Capacitor Output : 1000uF/100V
Inductor : 65uH
fsw : 39khz
current : 30A
...
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Why is this example of calculating the switching loss of a MOS transistor with an inductive load considered misleading?
I just saw an example of calculating the switching loss of a MOS transistor with an inductive load from this (page 20). Can anyone explain why they said this is ...
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Dirty VS clean ground: How to tie grounds?
I am trying to understand when grounds can be connected together and when they should not be. So far, I have learned the following:
Clean grounds should be connected together, as should dirty grounds....
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Voltage drop issues in LTspice simulation for buck converter using SW model
I have a LTspice design issue where I encounter the same problem, even when I use other available simulations.
Whenever I increase the load, there is a significant drop in voltage, despite having ...
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Possible noise from tps63020(buck converter) that is affecting audio MAX98357
I'm pretty new to the engineering but I hope this will be an easy question for those who have done much job in this area.
So I'm making my own pcb that consists mainly of esp32-s3, 2x tps63020 (3.3 ...
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PI filter for two buck drivers for a low-emi solution
I'd like to save space on a circuit that uses two buck LED drivers. The circuit is designed for a low EMI solution and there are two separate PI filters on each Vin pin (recommanded on the datasheet). ...
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How to calculate pull up resistor for Power Good Pin?
I am learning to design buck converter.
And using LM70880-Q1 buck.
There is power good pin is available. I want to make use of this pin. It is a open collector output that goes low if the Vout is ...
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Isolating Power Fluctuations and Buck Converters
I am building a robotics control module which, of multiple parts, controls servos. When enough servos move, a large power drop causes the microcontroller to reset. This usually happens with 3/4 servos,...
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What is the advantage of using polygonal copper pours over straight traces in buck converter PCB design?
Looking through recommended PCB designs for buck converters, I have noticed that their 'traces' are not usually direct lines, but rather polygons connecting each component.
What is the advantage of ...
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