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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2answers
364 views

LM2596s-Adj dc to dc buck converter

Does the schottky diode current rating affect the performance of a dc to dc buck converter when loaded? Im using a 1N5822 shottky type instead of a 1N5825 on a National Semiconductor LM2596s-Adj based ...
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331 views

Synchronous Buck High Side Driver - Why is the Fall Time of High-Side Gate Drive so Slow?

Below is the picture of my gate drive signals. The blue trace is the low side gate signal and the yellow trace is the high side gate signal. Both signals are measured across the gate and source of the ...
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1answer
840 views

I would like to use MC34063 in step up mode, but when I change the resistor value it stopped to work

I would like to use MC34063 in step up mode, to step up 19V to 24V and 1Amps current. I made this circuit: (the values not correct its only an image from the internet) The correct values: input 19V, ...
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1answer
124 views

Multi-phase Buck Converter - Does the inductor breakdown during the startup transient?

In a multi-phase buck converter, when and how does the inductor breakdown? Lets say the multi-phase buck converter has the following parameters: V_in = 50V, V_out = 25V, P_in = 225W (so max amps = ...
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2answers
58 views

measurement range of tdc

While going through some datasheets of tdc's (time to digital converter ) there is this parameter which is called 'measurement range', could someone please explain what exactly it is? If the ...
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201 views

CP2108 with level converter txb0108 - UART communication TTL and LVTTL

My project uses four different modems (one 3v3 LVTTL(?) and three 5v TTL) for AT communication. Each modem has a UART interface (TTL compatible). For my application, i chose the CP2108 to ...
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1answer
536 views

DC bus inversion to 3 phase AC modified sine wave using IGBTs

I'm working with a variable voltage inverter. I have 3 phase AC voltage coming in at 480V RMS line to line. It hits a full wave SCR front end, has a DC bus link, and is inverted with IGBTs to created ...
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1answer
287 views

How does this non-isolated buck converter work?

I found this converter-circuit on the Internet. I will use it to power an IR2153, which contains a 15,6V zener. I chose to use it because of the large losses of a resistive dropper. The unmarked ...
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1answer
199 views

Serial DB9 to Serial 3.5mm over HDMI cabling

Good afternoon everyone. I am trying to control a Samsung TV via Serial from a remote processor and I am trying to use spare installed HDMI cabling to do it. Samsung does not have an open API for IP ...
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2answers
1k views

Negative level shifter

I need to connect two circuits that use different PSU voltages. The first is a microcontroller clock generator, it outputs a clock 0V to 3.3V at 150KHz as maximum freq. I need to connect this clock ...
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1answer
221 views

Buck converter question

I am trying to design a step-down power supply. I was searching and browsing from Texas Instruments products and found one that might be the best for my use. I want to step down from 24V to 5V, output ...
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1k views

Calculating values for compensation network (boost converter RC+C network)

I'm trying to build a boost converter with current mode PWM control, but I'm stuck at selecting capacitor and resistor values for compensation. I'm using a LT1619 as the controller IC: simulate this ...
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745 views

Transistor based Voltage-Current Converter

For my last design question, Transistor current control with collector feedback, I want to add a NPN transistor between OpAmp and already shown transistor in common emitter mode. With new design, the ...
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2answers
745 views

How can I add adjustable current to a DC-DC converter?

I would like to use a DC-DC converter to adjust the voltage and the current too. I would like to use MP2307, XL4015 or something similar what can easily buy. How to add adjustable current? I dont ...
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1answer
329 views

Transistor current control with collector feedback [duplicate]

In my last question, Transistor current control with positive feedback differential amplifier I made a mistake. The actual circuit seems like this I am beginner in linear electronics and I am very ...
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2answers
1k views

How to trim up voltage on DC-DC converter

I'm using the TVN5-2421WI DC-DC converter where I need an output of at least +/-6V (which will then go into 2 LDOs that will drop it to +/-5V), so I'm trying to use the trim pin for this, however the ...
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3answers
79 views

how to convert the difference in voltages into a digital signal

How can I convert the differences between two voltages into a digital signal? ie. if sensor 1 V > sensor 2 V there is a digital one, but if sensor 2 V >= Sensor 1 V, there is a digital 0. I understand ...
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1answer
407 views

What's the difference between the LM2917 and the LM2917-N?

The schematic I'm looking at says to use an LM2917. The specs from the TI site use both LM2917 and LM2917-N and the shop on ebay uses both names too. http://www.ebay.com/itm/like/270864373784?lpid=...
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2answers
402 views

Boosting voltage from a current source

Hiah all, I have a beginner question about boost converters. I would like to model a solar cell using the following equivalent circuit: This effectively gives me a current source (constant in the ...
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0answers
62 views

Why doesn't the output of the rectifier come out?

Hello, I made a rectifier circuit. I also include a comparator. I referred to this paper --> An ultra-low-voltage self-powered energy harvesting rectifier with digital switch control. The circuit ...
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2answers
260 views

Is this inductor and caps a good choice for a buck converter?

I wanted to get together a simple and efficient 12V to 5V switching power regulator using only through-hole components that can be soldered to a nice protoboard. For my purposes, I need to provide 0....
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1answer
73 views

pH Sensor with current loop

I have a ph sensor(S272CD) that give the output from -2000mV to +2000mV. I need to interface it into a current loop converter(XTR117). The current loop ic will accept only 0 to 5v. How can i connect ...
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3answers
276 views

Question about Non-isolated Buck Converter [closed]

I have a tutorial problem about buck converter with MOSFET, anyone can help? During the test of the non-isolated buck converter (see the circuit below), when we measure the gate signal, there is an ...
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1answer
301 views

How is SC16IS740 programmed?

I'm interested in using the SC16IS740 UART-SPI converter to interface with W5500 Ethernet controller which has SPI inputs. Because the datasheet is unclear to me, I'm asking if anybody knows how is ...
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2answers
99 views

Connecting a medium sized 1 kVA Inverter with a 2 kVA Generator

I have a 1 kVA inverter which is using a 12 V battery to generate 220 V AC (battery is connected to a charge controller and is being charged by a PV). In addition I've got a 2 kVA generator. ...
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1answer
121 views

2mA Current Limiter from a dc to dc converter

I have a 12V power supply connected in a 12V to 5V dc to dc converter. The problem is, the current at the 5V side is 5A which my optocouplers cannot handle in fact, the only current i need is 2mA.The ...
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2answers
229 views

This circuit uses a transformer on a rectified DC voltage, what purpose does this serve?

I am trying to design a USB charger from scratch, and I have come across this schematic in the data sheet of a AC-DC converter that I would like to use (NCP1011): Unfortunately the circuit does not ...
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1answer
1k views

Is it possible to convert 12V dc to 220V AC?

One of my friend said it's possible to convert a 12V dc to 220V, I cann't belive that it's possible because IF that's possible we don't have to have too many power plants for our power needs. There ...
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2answers
547 views

2 dc-dc boost converters to create dual power supply

I'm doing a project with a Silicon Photo-multiplayer where the breakdown voltage when negatively biased is -25V. I was wondering is there anyway to connect two DC to DC boost converters to give me a ...
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0answers
349 views

very high current buck converter

Need to convert 40 volts to a 24 volt 2000 amp 1 second duration pulse. long duty cycle. Current must be settable from 500 to 2000 amps and time from 0.1 to 1.0 seconds. Ideas please.
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3answers
607 views

Mathematics of Cap Charging Circuit

To teach myself the basics of power electronics I've been trying to build a circuit, which charges up a capacitor to a voltage higher than the input voltage. Basically it's a boost converter with no ...
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1answer
351 views

What resistor values should I use with this boost DC-DC converter IC?

I'm trying to use a STOD1317BTPUR DC-DC Boost converter to drive a 12v OLED Display from a 1-cell lipo (~ 3v - 4.5v). The thing is that in the application circuit provided in the datasheet the values ...
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1answer
747 views

How do PWM AC/DC converters work

My question's subject is the SMPS(PWM) AC/DC converter design used for chargers. There may be more ways to make what I'm speaking about, so I'll try to narrow the list down. The circuit works using ...
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1answer
171 views

Noise Shaping of \$ \Sigma \Delta \$ Converters

I am currently reading the book Continuous-Time Sigma-Delta A/D Conversion to get myself a better understanding of \$ \Sigma \Delta\$ converters. Unfortunately I got stuck at the point where noise-...
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1answer
207 views

Cycloconverter , MOC3021 problems?

i am doing a cycloconverter single phase design and i have a problem , i use microcontroller to control the firing angle ,i have used zero crossing voltage (741) to trigger INTERRUPT port of MCU , i ...
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5answers
761 views

Voltage level translation between +3V and +3.3V

In a project of mine I have two ICs that work at different voltages. IC_A at 3V and IC_B at 3.3V and they talk to each other through UART. In my prototype I use a mosfet with two resistors for each ...
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1answer
4k views

Polarity symbols on universal AC-DC adaptor

I have a universal AC-DC adaptor that has the following symbol by the polarity switch: Is it safe to assume that the top part of the diagram indicates the polarity of the inner surface of the ...
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0answers
479 views

Flyback Converter Design Help

I am unsure whether I should edit on my previous question or create a new one. Please give me your feedback on the proper way of doing it here.Back to the question, I have struggled for the past few ...
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1answer
805 views

LTSpice Simulation Problem - Controlled Rectifier Single Phase Dual Converter

So I am having problems simulating a Single Phase AC/DC Dual Converter on LTSpice. At the first converter I am getting the perfect output but when I take the voltage probe from the second converter ...
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2answers
1k views

USB to TTL converter: why doesn't TX need a voltage selector?

I plan to flash new firmware for a Sonoff ESP8266-based switch. So I need a 3.3v USB to TTL for the programming. I see an inexpensive converter from China which has pinouts for 3.3v TX RX GND 5v ...
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1answer
919 views

How to turn off DC-DC step-up converter to run on 3 AA batteries

simulate this circuit – Schematic created using CircuitLab I am using this step-up converter : DC-DC step-up converter with 3xAA batteries (input voltage for the circuit is ranging from 4.65v ...
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2answers
2k views

CAN to SPI converter

I am looking for a chip which will convert CAN messages to an SPI message. Is there any chip available as such? Until now I have found MCP2515. But this chip does not serve the purpose, because SPI ...
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2answers
169 views

PWM controlled Input Voltage/Current regulated Converter (for solar panel)

(newbie question) Briefly: In a converter (let's say DC-DC), I want to dictate a voltage to the output of solar panel, on the fly. As I look around online, for example in some IEEE papers, Buck or ...
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2answers
1k views

Run a 120V/60Hz motor at 230V/50Hz

I need a step up converter for a 5.1A, 120V vibration motor I have in the US that I need to use in Ireland. The motor runs at a fixed frequency of 30Hz in the US. If I step up to 230V for Ireland will ...
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1answer
2k views

Upgrading automotive heater blower motor resistors with a PWM based device

My 2004 car has a resistor module attached to the DC heater motor circuit that has three coiled resistance wires (2.1 Ohms, 1.5 Ohms and 1 Ohm), two which have burnt out as only two out of four speed ...
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4answers
3k views

110 AC to 12 DC with high Watt

I'm looking into purchasing a winch that is powered by 12V DC. It's a 1 horse power winch, so I assume it requires just over 700 Watt to function at max load. Right? I want to use it at home, so I ...
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1answer
88 views

DC/AC Converter using Motors

I have two motors: One from a DVD player and Stepper motor. I was wondering, if I use the DVD player motor to spin the stepper motor will I get an alternating current?
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3answers
769 views

Convert low power Alarm Clock from 120V 60Hz to 230V 50Hz

I recently bought a vintage flip-digit radio alarm clock from ebay, because I plan to refurbish it and basically use it for the rest of my life. However I only realized that the device must be ...
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1answer
1k views

24V to 5V converter using a LM3489

I'm currently trying to create a converter 20V-26V to 5V with an 2.1A output. So I use the LM2489 chip (datasheet: here). My circuit is the following: I make this circuit but with I power up ...
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1answer
300 views

Use car speaker output as input to IC?

I have a circuit that is to be used together with a car stereo. The circuit detects DTMF tones (touch tones) using the Holtek HT9170B. I need to feed the HT9170B with the high level speaker output ...