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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Using VOUT to Power Up a DC-DC Switching Regulator
I am trying to use LM5117 to convert 36V (VIN) to 32V (VOUT) for constant current constant voltage application. It seems the datasheet is saying if the VIN > 14.5V I can use VOUT with a Zener diode ...
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Sampling gain effect in buck converter
I recently learned that there is a phenomena called sampling gain effect in dc-dc converter and I am struggling to understand what this phenomena really is. Could someone enlighten me?
And I have seen ...
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Reverse current into DC/DC or LDO
Suppose we have a generic scheme like this in figure, in order to protect the inputs of a microcontroller or logic gates from overvoltage essentially. For instance now we're applying 10 V at the input,...
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Building a constant current circuit [closed]
The constant current output should be able to be set from 0.2 mA to 20 mA with a load of 3500 ohms ±50% from a 5V battery source and a PWM signal set by a microprocessor. Do I need a transformer or ...
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Clock Driver - What's wrong with my H-bridge design?
I'm trying to design a drive board for a vintage slave clock. These things take an alternating 24 V pulse once a minute to advance the display.
Since the drive board should be powered by 5 V, I wanted ...
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Why is gate driver circuit input voltage and current varying? [closed]
We are developing a switched capacitor type DC-DC converter where we are using IGBTs with gate driver circuit. However when we are increasing input voltage of converter above 7 volts the gate driver ...
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How to tell if buck converter outputs are isolated? [closed]
I'm looking for a cheap CC CV buck converter with separate grounds.
How can I determine which converters have isolated outputs and how can I find such modules?
I know sites like ebay and the likes are ...
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Transformer Design Understanding [closed]
I have been asked of this challenge from a fellow mate. In light of my current understanding of the problem, I wanted to reach out to see if the community would be so kind as to provide guidance with ...
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Current into DC/DC or LDO doubt
I need a circuit that regulate and invert the input signal 0-24V to 0-3.3V of output signal. Also a pullup that produce a low signal when the input is detached. I thought about a schematic like this. ...
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Boost converter output instability
I'm currently working on a DC-DC boost converter project and encountering this issue where the output initially peaks but falls back to the input voltage. My desired output is around 140 V.
I'm using ...
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Can Forward Converters be used to Boost the Input voltage [closed]
I have been trying to design a forward converter that boosts the input voltage of 5V to 15V, with RCD Active Clamp reset, is it feasible to design such a converter?
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12 VDC to 24 VDC conversion for PLC input high signal [duplicate]
I have Siemens S7-1200 PLC DC/DC/RLY. It takes 24 VDC inputs. One of my inputs to PLC is 12 VDC. I want an intermediate circuit that converts the 12 VDC to 24 VDC. Moreover, I have a 24 VDC source ...
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Circuit to convert 14.8v battery with max 4a discharge current into 12v, 9v and 5v output?
I am making a robot with multiple devices mounted on top. I am planning to buy either a 14.8v or 11.1v Li-ion battery which has internal BMS limiting maximum discharge current to 4A. Now I need 9v for ...
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Do I need to add a filter for an isolated DC-DC converter?
I have purchased three CUI Isolated DC-DC Converters, the models are VHK50W-Q24-S5, VHK150W-Q24-S12 and VFK600-D24-S24. I wonder you could help / guide me to the correct use of them.
Questions:
I saw ...
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Can you power 2 voltage rails simultaneously using a buck-boost converter?
I am designing a custom PCB and want to power 2 rails: a 3.3V and 5V rail, with a single 250mAh LiPo battery (3.7V) and need the 5V rail to have as stable a voltage as possible.
I understand that a ...
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Solver settings for buck converter simulation in simulink
I am trying to simulate a buck converter in simulink to operate at a 200 kHz switching frequency.
The compensator settings that I am using are shown below -
The desired input and output voltages are ...
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Why should I route the feedback trace under the output capacitor?
I'm looking at the TI TPS5430DDAR. In the reference circuit, it has a note to route the feedback trace under the output filter capacitor.
It feels like it would be much more simple/direct to not do ...
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High power dc/dc converter (or voltage clamping) with high source impedance
Short version:
I have a DC voltage source (adjustable up to 750 V 60 A) that is powering our robot which expects 320 V nominal (never exceed at 360 V) and can consume up to 30-35 A (but only 30 mA ...
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Tantalum capacitors in synchronous DC/DC converter
I'm designing a synchronous DC/DC converter with discrete components for a project. The overall power supply, which I'll refer to as the DC bus, is 5V. I wanted to know if it's advisable to use a ...
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Comparing different scenarios for DC-DC power delivery between two PCBs
For my robotics project, I am dealing with a system that is broken up into different components, that are mechanically decoupled (a head and torso part, connected via a multi-wire cable). I want to ...
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Can I use one 12 V 8 A power supply to provide 5 V 10.5 A power via buck converters?
I want to power four 5 V devices via a single 12 VDC 8 A (96 watt) supply using a buck converter for each device.
I know I could try and redo my circuit but this means disconnecting and rewiring just ...
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Troubles with a 20 V solar panel and a DC-DC converter [duplicate]
This is part 2 of my previous post. (Trouble with making a DC-DC converter)
Since my previous post, I have finished making my DC-DC converter (switched my power supply and added two 5 W 2 Ω cement ...
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Buck converter with external reference voltage?
I would like to have a buck converter that takes in a reference voltage, and outputs the same voltage.
This is assuming that I'm giving it a Vin that's high enough to support the output voltage that I ...
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What happens if one of DC serial power fault?
The circuit as this picture:
I create +/-5V dual rail powers for +/-Vs of OP-AMP with 2 power modules(IRM-03-5).
COMM does not connect to GND.
What happens if the one of following fault occurs?
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I want to control the voltage and current of a LTC3780 module using an Arduino
Is it possible to adjust the voltage of LTC3780 through this circuit?
I don't know much about circuits, but I designed it based on what I studied.
Please understand even if I’m not good at English.
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Boost converter duty cycle
In my circuit, I’m trying to solve the duty cycle to obtain an average dissipation of 5 W in the diode.
Input voltage: 100 V
Inductor: 10 mH
RL: 100 Ω
C: 10 uF
Freq: 10 kHz
Diode on voltage: 0.7 V
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5V USB-Power without Battery makes MCP73832T toggle the LED
My schema works as long as the Battery is attached to it.
In fact, it even works if I disconnect the Battery - EXCEPT that the LED1 toggles in that case.
My intention is to use the circuit either
5V ...
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Running a TV Using Only Solar Panel, Without a Battery
Objective
I would like to power single 49 inch TV (LG 49LF6300) using only solar panel without a battery. I am aware that this will only keep the TV running for a few hours each day but this is not an ...
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Why have 3 AAA batteries not one AA and raise voltage (how expensive is it to raise voltage from 1.5 to 5v)?
I have led headlight with 3 AAA batteries. I will rather have similar device use 1 AA battery, even if it will be more expensive. But seems there are no such devices. Why?
I've got the question after ...
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Inductor based or switched capacitor DC-DC converter for given load parameters for mouse's headstage
For my master's thesis project, which focuses on designing a control loop for a DC-DC converter in the receiver of a resonant inductive coupling system to handle significant and unpredictable ...
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How can I amplify an analog DC voltage signal? [duplicate]
I have a 24 VDC liquid sensor that outputs 0.6 - 1.6 VDC depending on the quantity of liquid on a substrate.
How can this be amplified to ~1.0 - 10 VDC?
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Interleaved PWM Generator for DC-DC Converter
I have an PWM signal ready from opamp which has an switching frequency around 10KHz what can be done to obtain an interleaved version (T/2 Delayed version) of this signal
FYI,
I have used sawtooth ...
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Synchronous buck converter using gate driver IC
I designed synch. buck converter by using gate driver, MOSFETs, inductor and capacitors. I am currently testing in open-loop configuration and later I will test in closed-loop with microcontroller as ...
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Step Up power (from 0.02-0.6 DC V input to 5-12 DC V output) I need a suggestion [duplicate]
I want to design a DC-DC converter to have a power supply that can charge an electronic device.
The issue behind in that the expected input range is 0.04-0.6 V DC. I chose both MT3608 and LTC3108.
The ...
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Stepping Up power (from 0.02-0.6 DC V input to 5-12 DC V output)
I want do design DC-DC converter to have a power supply that can charge an electronic device.
The issue behind in that the expected input range is 0.04-0.6 V DC. I chose both MT3608 and LTC3108.
My ...
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Push Pull and flyback converter topologies dead time confusion
I am having a slight confusion regarding the flow of the currents in the push-pull and full-bridge durig the dead time. Considering a the push-pull converter during the ON and dead time.
Image Link
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Energy harvesting using LTC3108 not working
I’m trying to boost the energy of a plant microbial fuel cell (PMFC) using the CJMCU 3108 LTC3108 energy harvester breakout board. I’ve configured it like the image below, for 3.7 V.
LTC3108 datasheet....
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How accurate is an open-loop synchronous buck converter using gate driver IC?
I've designed a synchronous buck converter using a gate driver IC and two MOSFETs. I have 10 mH and 6.6 uF capacitor at the output as described in the attachment. I am providing 15 V as an input to ...
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Trouble with making a DC-DC converter
I have been trying to make this DC-DC converter:
I used a J380 p-channel MOSFET instead of the IRF9640 and a EK-04 schottky diode instead of the MBRS360 in the real circuit. In addition, I used a ...
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Connecting GPIOs on two boards with independent power supplies
I'm trying to design a board that will accept UART/8N1 input from another board at 3.3V. While the two boards share a common GND (obviously), they otherwise have totally independent power supplies: ...
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What options exist for isolating a high power DC analog signal? [closed]
I have a high power DC signal that can range from 0-325 VDC. The source is capable of delivering up to around 150 amperes at 325 volts. I need to monitor the voltage as an analog signal by reading it ...
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dc-dc converter does not match the spec
I am trying to use a cheap DC-DC boost converter I got from ebay. I need about 300 mA at 3.3 V.
The ebay spec is:
Input voltage 0.8 ~ 3.3 V, output 3.3 V
Maximum output current: 500 mA
Start Voltage ...
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Building my own variable UC3843 dc to dc boost converter
I am trying to make a boost converter using UC3843 with the following
the input voltage = 24 V
the input current = 3 A
the output I want variable = from 120-235 V
the current output = 0.3 A
I will ...
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Bidirectional DC-DC conversion between two low power rails
Problem Statement
I have two power rails: 3V and 12V. Both of them have variable loads (e.g., microcontrollers, motors) and power sources (e.g., solar cell, battery) on them. The typical max current ...
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Redesign of a power supply with a 4-channel DC-DC converter
I'm currently working on a project involving a microprocessor, where I'm using a 5V input via USB. To power a microprocessor and other components, I need additional voltage inputs of 3.3V, 3.0V, 2.5V, ...
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Untraceable datasheets of DC-DC buck converter (5 pin SOT23-5 IC) used in TP-LINK WiFi Router TL-WR720N V2
I am trying to search the datasheets of DC-DC buck converters used in the TP-LINK WiFi Router TL-WR720N V2.
LD5AX and
TR5XF
A couple of years ago, an above mentioned router, belonging to one of my ...
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Get a negative voltage from normal DCDC
I should make a positive-to-negative dc-dc converter.
The specifications are:
Vin: 2.9V to 7V
Vout: -3.3V to -15V
Power:6W
I have seen that it is very difficult to find DCDC (module or chip) with ...
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DC-DC current mode control frequency behavior
On a buck converter in average current control mode, for example, the inner current loop sees and manages the double pole created by the LC filter, and thanks to this the outer voltage loop is blind ...
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Redesign the PTN04050A
for an old project I need to replace the Texas PTN04050A module (which is no longer available) with an equivalent module.
Since I don't want to change anything else, I would like to redesign an ...
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Best way to avoid vendor tie-in with DC/DC Converters
I frequently utilize DC/DC step-down converters in many of my projects. Mostly these converters have a low voltage input (Vin_max = 30Vdc) and low output current (Iout_max = 1-2A).
There's a plethora ...
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