Questions tagged [dc-dc-converter]
DC-DC conversion. Implies conversion of a DC voltage level up or down. DC-DC converter can be isolated or non-isolated. Electronically it can be done by many kinds of circuits, depending upon the application (charge pumps, voltage multipliers, linear voltage regulators, boost/buck switched converters, etc)
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Maximizing power transfer from 50Hz AC line via toroidal current transformer
This paper looked at ways of achieving high power-to-weight ratio for harvesting power from a 50Hz overhead line.
https://findresearcher.sdu.dk/ws/portalfiles/portal/250674676/...
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Circuit analysis for DC-DC convertor SEPIC architecture
I'm analyzing the following reference design from Texas instrument for making a variable dual output (+/-60V form 11V):
What I'm curious to know is to understand the signal waveform for the following ...
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plecs simulation of output impedance of switched capacitor(SC) converters
I am trying to simulate how output impedance of several DC/DC switched capacitor converters(dickson, ladder, and series-parallel) changes as switching frequency increases.
I referred to several papers;...
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Filter on SEPIC architecture output for making +/- 60 V from 11 V input
I'm working on a LM5155 Boost/Flyback/SEPIC controller reference design PMP40488 from TI. The goal of the design is making variable output (maximum +/- 60 V) from 11 V input. My question is related to ...
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Constant output voltage in buck-boost converters
I'm a self-taught student. I'm trying to understand the working principle of buck-boost converters in continous conduction mode.
When the switch is turned on, the equation describing the inductor is ...
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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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Zener instead of resistor divider on dc-dc converter feedback pin
This dc-dc converter steps up voltage from 3.1V to 7.5V. I'm curious about the unusual D2 zener + R3 resistor to set the output voltage, instead of the traditional resistor based voltage divider. I ...
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Current spike through bootstrap circuitry during turn-on and off of HS FET (GaN FET half bridge dc-dc)
I am looking at the Vds overshoot behavior of Gan FETs through a half-bridge buck boost SPICE simulation. I have been varying gate resistance and parasitic inductance in the power loop. I noticed ...
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DC-DC converter to make variable output +/-70V from 5V input
This is a SEPIC DC-DC architecture from Texas Instruments to make a variable output from +/-5V to +/-70V. Iwould like to understand the principle of how the negative voltage is being made from the ...
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Bipolar 15 V DC from 9 V DC
I’m looking to get a regulated ±15 V DC @100mA minimum from a 9 V DC source. It’s for an audio circuit, so it needs to have a switching frequency well above audio range, and it needs to have a small ...
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Level shift a digital 1.8V signal to split supply rail, using BJT
I have designed a DC/DC converter (based on Zeta technology) that will generate a split supply with a single buck controller and coupled inductor.
The controller's GND pin is the negative output. ...
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DC-DC converter design simulation tools and Webench design tools to identify the best-suited IC and schematic
I did a research about what are the simulation tools and webench tools for major companies like AD and TI to find a effective tools for my design purpose:
For example for Analog Devices, there is the ...
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Does this DC-DC converter model require an external switching signal?
I looked at the datasheet TPS62742. It says that there is a required input DC voltage and it looks like an output voltage is produced but it says "sw" which I thought was where the switching ...
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RCD snubber loss in flyback converter
I have few queries in analyzing the curves. Below is the flyback converter with RCD snubber circuit and waveforms.
When the FET is turned ON, there is no primary current flowing through snubber as the ...
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DC-DC SEPIC convertor design
In a reference design form Texas instrument for a SEPIC architecture:
I noticed there is a specific consideration for connection between HVGND and PGND for LM3488 as follows:
At the same time that ...
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DC-DC convertor-SEPIC architecture
I'm working on a SEPIC DC-DC convertor, in the reference design from Texas instrument there is MOSFECT which is derived by DR pin of the main controller (LM3488) as follows:
There is an diode (D4), ...
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SEPIC DC-DC converter
I want to do the layout for a SEPIC DC/DC converter as follows:
In the datasheet of the driver LM3488, they have recommendation for layout, which means the traces should be as short as possible for ...
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DC isolation - 3 separate circuits with same power source and shared I2C
I am trying to build one small project and based on the needs I need to isolate few components but also keep them connected using I2C. I was doing a research and found few DC DC isolator converters ...
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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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How does MPPT maintain a constant voltage?
I have a slight confusion in the working of the MPPT algorithm in solar inverter. I am confused about how this converter maintains a constant 310V (required for H-bridge) with MPPT. MPPT is a maximum ...
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DC DC boost giving high voltage , minimum quiescent current
My dc-dc gives 25 V on load instead of 5 V, Arduino calculator shows similar values for 3 V supply.
Supply is 3 V 2 AA batteries.
Led blinking ON for 100 msec OFF 900 msec, current 150mA
The intended ...
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Calculating junction-to-ambient temperature rise for switching MOSFET
So I'm looking at datasheet's since I'm looking for a N-Channel MOSFET for a DC-DC Buck Converter that will be switching at 1.2MHz. Since the MOSFET will be used as a switch for the Buck Converter, I ...
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LM2675 outputs wrong voltage, not sure about layout
I'm making an ESP32 board to control some 12V outputs, so I got an LM2675-3.3 buck converter IC (datasheet) to power the MCU. This is my first time designing and soldering a PCB and I'm guessing I may ...
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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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Periodic Voltage and Current Fluctuations in Autonomous Robot System
I have an autonomous robot system powered by a 24V LiFePO4 battery that has several distributed PCBA's getting their power from the 24V battery, and also having their own on-board DC-DC buck ...
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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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How should I come up with a power supply for 5 motors, one micro-controller (ESP32) and one microprocessor (Jetson Nano) for an object sorting arm
I am trying to design a power supply for a robotic arm with 5 servo motors(2 are MG90S and 3 1501MG motors). I'm planning to use an ESP32 microcontroller and Jetson Nano.
I have the option of using ...
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TPS65131 inverting dc-dc overshoot
I am trying to make a ±12 V power supply with a TPS65131 DC-DC converter.
The positive rail looks just fine, but the negative rail overshoots to around -12.7 V and then slowly recovers to -12 V, then ...
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Why are these transformer windings used connecting the switch and the series pass regulator in this circuit?
I am looking into this multi-output forward converter and cannot figure why these highlighted windings are connected to the switching side. There's already an inductor to handle the recovery reset. ...
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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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