Questions tagged [converter]

A circuit that converts a signal from one form to another. Analog to digital, Digital to analog, Voltage to current, Current to voltage etc. The key to understanding is the transformational properties of the circuit as opposed to just amplification or buffering.

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SFP, understanding control pins

I have an FS SFP (SFP-GB-GE-T 1000BASE-T SFP 100m). My device has some I/O pins such as TX_DISABLE, RATE_SELECT_1 and RATE_SELECT_0, etc. I am having a hard time finding documentation on these ...
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Connecting the grounds on a non-isolated DC/DC converter

For isolated DC/DC converters, I know that it's a good idea to have two different grounds on both sides and that we should avoid to connect the two grounds together as the isolation is useless when ...
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Inverting DC-DC converter input ripple issue

I'm trying to implement an inverting Cuk DC-DC converter on a 2 layers PCB, in order to generate a -3.3V rail from 3.3V, but the circuit affects greatly the input rail. The 2 rails are used to power 4 ...
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Why is the input current for a forward converter negative for a short time? [closed]

We have made some lab excercises with a forward converter and I was wondering why the input current of a forward converter is negative for a short time. Screenshot of oscilloscope can be seen below, ...
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Is there any problem to test the following topology without load?

I've implemented the following PFC boost 80W converter. Is there any problem to test the following topology without load?
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XL6009 and isolated output

I want to make an isolated DC to AC power supply, with the XL6009 circuit, and I don't know what role "Cdc" have in the circuit. Can I take it off? My power supply is powered at 5v DC and at ...
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Problem connecting two DC-DC converters in one circuit

I'm building an audio mixer for microphones, and have a problem with the power supply part. I'm designing this board to work with several voltages which are +/-15V, 5V, and 48V (for phantom power). I ...
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78 views

Bidirectional voltage-to-current converter

How to make the following voltage-to-current converter bidirectional, so that bidirectional current can be driven through the load?
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CH340G set of chip partially working

I bought quite a number of these CH340G USB-to-UART chips for a project. I initially mounted them on PCB and soon discovered some of them are working and others don't. To help me testing each ...
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How can I drive an LP101WX2 LCD panel with the Chalkboard Electronics HDMI-dualLDVDS converter?

I am trying to drive an LP101WX2 panel with the Chalkboard Electronics HDMI-dualLDVDS converter but all I am getting is a black screen. I tried to flash the board's firmware with both the demo and the ...
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How to properly tune a PR controller on a Hybrid Active Filter

So, I'm designing a modular multilevel converter which should act as a shunt hybrid filter. The goal is to synthesize 5th harmonic currents with a PR controller in alpha-beta coordinates. The thing ...
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Critical inductance for buck converter

I have this problem: - The critical current must be \$P_{out} = V_{out}I_{crit} \Rightarrow I_{crit}=\dfrac{45\text{W}}{16\text{V}} = 2.8125 \text{A} \$ Using eq. 3.43 from Ned Mohan's book we have $$...
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How to reduce 20 V to 3.6 V to power flashlights

I am planning on using a DeWalt 20 V battery pack to power two Thrunite TH30 flashlights. They need 3.6 volts and 5.18 amps for both of them combined. The flashlights will be physically connected, but ...
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993 views

Circuit that converts sine wave to RMS voltage

How do I design a simple circuit that converts a sine wave to an RMS voltage? The input will be a sine wave and the output an RMS voltage. I know I will need an ADC, but not sure which one. I also ...
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2 answers
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Convert 12V PWM to 5V for Arduino input (ZigBee LED controller)

I got this ZigBee controller. The output of which I assume a 12V PWM signal because of the 12V LED strip you can connect it to. I want to connect it to my Arduino input. This way the ZigBee ...
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DAC converter: offset error

If I have for example a 5-bit DAC converter with a Vref = 16V and the Vout = 0 when the input is '00000': Can I calculate the offset error of this DAC if the Vout = 375mV and input is '00000000' even ...
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How to design a filter for multiple buck converters

I am designing an electronic circuit with multiple buck converters on it. All bucks are supplied by a 12V DC input voltage from a converter which is on an other card. I want that my converters don't ...
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Converting an AC Bookshelf Stereo to Use DC Batteries (e.g. Power Tool Batteries)

Summary of my Goal: Convert a standard AC-powered "bookshelf-style stereo" to use 1 or more of the power tool-style 18V DC batteries. I would like to use (up to 4) 18V 2.0AH batteries like ...
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High Voltage PWM

I really hope someone can help me with this difficult issue: I want to generate a PWM signal from a 170V DC input. ok, so far I have an arduino that can generate a PWM signal and drive a MOSFET that ...
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1 vote
2 answers
76 views

Buck converter output voltage dips and makes noise when connecting 1A load

I've designed a buck-converter board using a ROHM BD9F500QUZ-E2 for 12 V output. Input will be connected to a 4S battery. On no-load conditions, the IC outputs 12 V, and when the IC is loaded with 500 ...
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3 answers
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Connect rectifier to DC power source? [closed]

I'm thinking about DC appliances and energy efficiency. A common appliance like an air conditioner has a rectifier to convert 230V AC into 50V DC. If I connect the appliance directly to 50V DC instead ...
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Frequency converter for spectrum analysis

I have an oscilloscope/spectrum analyzer that has a maximum sampling frequency of 20MHz and I would like to analyze the spectrum of a higher frequency band (also 20MHz wide) for example 90-110MHZ to ...
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Why are Coax-to-Ethernet converters causing the entire network to stop working?

I have installed nine of these Coax-to-Ethernet passive converters, which allow me to use existing coax cables to transmit Ethernet traffic from IP cameras. This was necessary due to the inability to ...
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Convert DC frequency (square wave) to AC

I have a DC frequency generated as a square wave from a 555 at 14 kHz (actually will be using a variety of frequencies but 14 kHz is one as example) with a voltage of 4.0 V. I want to convert this to ...
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Making a DC to AC converter at home

My idea was to build a DC to AC converter, and I want to make sure it's feasible: simulate this circuit – Schematic created using CircuitLab A supercapacitor has very low voltage operating ...
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197 views

AC to DC converter that outputs positive and negative voltage [closed]

I have to design a power supply that takes AC, converts to DC and outputs 9V and -9V with respect to ground. The current being handled is no greater than 100mA (Possibly much smaller than 100mA). The ...
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Waveshare High-Precision ADC HAT ADS1263 10-Ch 32-Bit for Raspberry Pi

I want to use an analog to digital converter but it has input - + 5 volts. My sensor is a magnetic sensor that has output - + 10 volts, my question is how do I do the voltage division so that - + 10 ...
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2 votes
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Booster Circuit Input Capacitance Design

I am trying to design a booster circuit. I need to find the inductance, output capacitance and input capacitance. I have successfully calculated the inductance and output capacitance. However, I am ...
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power available to a DC-DC step down atached to an ac power adapter

I have an AC-DC power adapter with output rated at 3.42A @ 19V and a Step Down Buck converter Xl4015 rated to manage up to 5A with 96% efficiency conected to the power adapter output. What is the ...
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1 answer
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Why do I get these voltage spikes in my buck converter? [closed]

I want to make a buck converter with bidirectional GaN FETs, so each switch is made up of two back-to-back GaNs: The problem that I encountered is that if I have a deadtime (DT) higher than 0 ns ...
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Using ARM or any microcontroller text output [closed]

As you may notice, some microcontrollers have an output in textmode with four pin assigned to send serial data. In some cases we may need to use this output for finding our problem,without forcing to ...
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What is difference between MPQ8645PGVT-3010-Z and MPQ8645PGVT-3011-Z?

The both MFG no mentioned above has same datasheet? In datasheet they have mentioned like there is a programming for the configuration. Link: https://www.monolithicpower.com/en/documentview/...
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Step-down converter in an ATX PSU, why?

I was recently looking at a 500W PSU schematic, and found out they used step-down converters on 12v and 5v output. Schematic is attached(pls see hi-res at https://ibb.co/nbDRJPq) The D2 diode charges ...
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Converting dry contact to momentary switch with feedback [closed]

I need to adapt a fan that is turned on/off with an SPST momentary switch to also work with a dry contact. Additionally, I need to ensure that the desired fan state is reached when the dry contact ...
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Design considerations for 3-phase AC-DC converter 60 vs 400 Hz

If I want to convert 400 Hz, three-phase, 200 VL-L to 28 VDC, how would I go about doing that compared to a conventional 60 Hz equivalent. In other words, what design considerations need to be taken ...
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Purpose of Input Resistor On AC/DC Converter?

I am currently in the process of sourcing an AC/DC converter module for a project I am working on. I am thinking about using the PSK-3D-5 120VAC to 5VDC converter, which gives the following example ...
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Synchronous DC-DC buck converter body diode switching loss

I have a couple of questions regarding the body diode of MOSFET. I was looking at the calculation of the switching losses in the synchronous buck converter. For calculating the turn-off switching ...
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Converter power loss and efficiency: Is there an error here, or am I just misunderstanding these two facts?

I am currently reading the textbook Fundamentals of Power Electronics, third edition, by Robert W. Maksimovic and Dragan Erickson. In the introduction, the authors say the following: High efficiency ...
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Optocoupler pull down resistor

How to use optocoupler pull down resistor at forward converter? I have to use pull down resistor, because I have to use to TL494. Vo=25V Vo.sen=2.5 CTR=0.8. Are there any rules?
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Multi carrier frequency conversion and phase noise

I have a oscillator with a phase noise mask that was represented in dBc at specific offsets from a carrier. Two options with a multicarrier signal going into a converter, apply the phase noise mask (...
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2 answers
405 views

How to generate a -12V to +12V PWM signal from 0V to 3.3V (or 5V)

I want to build my own Type 2 electric vehicle (EV) charging wallbox. In order to communicate the maximum charging amperage of my wallbox to the EV, I have to generate a -12V to +12V PWM signal of 1 ...
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Which resistor should I add in place of potentiometer in XL6009 boost converter module to increase 3.7 V to 12 V? [closed]

I'm using 18650 batteries with XL6009 boost converter module to increase 3.7 V to 12 V. There is a potentiometer to control the output voltage in boost converter. But can we fix the output voltage to ...
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Understanding Buck Converters [closed]

I need a little help designing a buck converter. Basically I want to generate a 5V output that will stay the same regardless of load resistance and that will exist when the input varies between 12 and ...
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Converter RS232-Optical

Based on the configuration below: [Network Element 1] ----(RS232 TX)----[Converter RS232-Optical]-------[Converter Optical-RS232]----(RS232 signal) ----> [Network Element 2] From the network ...
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AC converter with MOSFETs

For this AC-AC converter circuit: and these VGS signals: I would like to know how the current flows through the circuit when the FET1 is OFF. These are the output signals - VDS1 and VDS2: It shows ...
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3 answers
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What is the function of the inductor in the "Dual active bridge" DC/DC converter?

Studying the principle of operation of the DC/DC converter "Dual active bridge", I'm trying to understand what task the inductor (Ls) shown in the diagram performs. The transformer ...
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2 votes
1 answer
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Boost converter drive inductor into saturation

The boost converter I'm trying to put together might seem a little bit odd, as it's made out of parts that belong in a museum, but I've quite a lot of them so I thought to use them for something. I ...
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Serial to Multimode Fiber Converter

I'm looking for a way to convert UART data to multimode fiber. I've seen a few examples of single mode conversions, but that won't fit the application. Has anyone ever done this? I know that most SFP ...
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5 answers
181 views

What is an analog to duty cycle converter?

What is an analog to duty cycle convter? A typo or a real thing? Source: https://www.researchgate.net/figure/Accelerometer-block-diagram-12_fig2_267558886 This is the block diagram of the ADXL202E.
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RL circuit with thyristor not working as expected

I'm trying to simulate the following circuit to test how it works: The control circuit uses a PIC 18F4550. The isolation circuit, and main circuit are these: Unfortunately when I try to simulate ...
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