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144 Threads found on edaboard.com: 5v Dc Converter
Thank you all for taking the time to go through my post. I really appreciate your Kind gesture.Sir i would be very glad if somebody could try and explain this concept to me. Like klausST said above. I actually used a 250 Ohms resistor at the Input pin of my ADC circuit and i measured the current at that Point. The value of the current was 3.8mA whe
Hi all! I have been trying to build an inverter to go from 14.7V to 120VAC @60hz I have also been trying to learn more about power supplies which I'm find very interesting. I have been looking around at different designs of power supplies by finding junked ones and taking them apart. While it is not junk I bought a 5V boost converter with
Need a Heavy Duty Buck converter with Negative Common. Conditions and Ratings: Input: 18 ~ 30V DC Output: 12.5V / 10A Continuous. Run time: 24hrs at 10A. Cooling system: None / Air Cooling. Input and Output Ground is common. N-Channel MOSFET. This was the conditions. I tried with Push-Pull type, Single Inductor Buck converter and
Hi, I need to design a 24V dc (input supply tolerance 19.2V to 32V dc) to 5V, 3A dc converter with 1.5KV isolation between the input and the output. I want the dc-dc converter to have a high efficiency (90+ if possible) and low ripple (<200mVp-p) at the output I don't want any software control over the converter i.e., I dont want (...)
You'll use a circuit that doesn't connect the -100V directly to an amplifier pin but drops the voltage across a resistor. A basic inverting OP amplifier will already achieve this. So you're saying that "let's say I use a voltage divider as a sensor t
Hello everyone, i am making a wireless charger for my phone. I need to fit a small ac to dc circuit in my phone's back(<1mm). I can't find small diodes ( i need to convert 5v, 1a or more). Can you post a schematic with small parts ? Thanks.
Use a relay simply... (Contactor): It has two switches, controlled by the act of electromagnetic field, you supply the relay with 230v AC and branch two terminals to switch 1. From the same source use an AC/DC converter and branch its two terminals (+5|-5V). At the end the output would be for switch 1 230V AC and for switch 2 two terminals as +/-
If I converted a 9v DC to a 5v DC, what will happen to the voltage that has not been used. Will the voltage be preserved or the circuit will just consume it? Thanks :)
A battery gives a DC voltage, not an AC voltage. Maybe your multimeter is broken. A 12V lead-acid battery that measures 12.5V with no load is almost dead. It should measure 13.2V to 13.8V when fully charged. We know nothing about your DC-DC converter since you did not post its schematic and parts list here.
Hi, I want to design a DC-DC converter to get 5V from 28V(DC). The following are requirement has to match 1) The unit should operate with a power supply with a nominal voltage of 28V. 2) The unit should operate correctly in the input voltage range of +16V DC to +31.5V DC 3) The unit should functional when the power supply voltage drops t
Regaridng basic pwm operation, the transistor voltages are only determined by the converter input voltage, there's no difference between e.g. 5V and 10 V output regarding switcher voltage levels, just a different voltage level. It's not explicitely specified in the datasheet, but implicitely Voutx pins are limited to Vcc (as "other" pins in maxi
5V wallwart? Depends on how much current you are going to need?
Use a transformer for safety. Select a high secondary voltage, say 24V, and use a diode bridge. You should get a pulsating DC wave out that is 24V X 1.414 - 2 X .7V = ~ 31.5V. Then use a pair of resistors to step it down to so 230V in gives you 5 V out. If you want a pure DC, connect a 100 MF 35 Volts working or greater capacitor across the output
hi, I want to implement a ac/ac speed controller for 1/2 HP induction motor. I have issues in driving the gates of THYRISTORS. There are 8 THYRISTORS as shown in the converter file. Is it a good idea to make 8 isolated 5v dc supplies using 8 small transformer , rectifier bridges and linear regulators such as lm7805 and connect them as shown
can i do same as this : ELM - Pocket LED light thank you Yes that circuit will work - it is used a lot for low voltage input - you will need a good quality transistor if you want to get 500mA out though, and a well designed magnetic part suitable for the boost t
hello... i need circuit for converter dc -dc for step up and step down my regards Checkout make it confirm that you really need 5V. Why don't you try it at 3V ? You can save power on low voltage.
I would like to build a DC-DC converter that with a command is able to switch its output voltage from 12V to 14.5V. I am thinking about changing the resistor between the FB pin and the SW pin of LM2673 by using solid state relay. Before building it I am wondering if there are any issues during the relay's turn-on/turn-off phase. I attach the schem
I've seen some design in this forum for a dc-dc boost converter for Nixie tubes running at 180V. Though all designs I've seen are running from 9V DC supply and more... This week I came across this item on ebay, and it looks like it is using a LT DCDC converter chip and a MOSFET packaged in SOP-8, delivering up to 5W at 5V DC input: w
Buy a 1:10 geared motor and attach a handle to make it a hand cranked generator. 98266 Now connect a DC-DC converter to it's 5V output
Input Voltage : 24V Output Voltage : 5V Current 1A
I'm designing DC/DC converter for low power application of up to 50 Watt using MOSFET half bridge configuration. MOSFET will be supplied with 325V (dc) which I've to convert into 1.5v(min)-50 volts(max) at isolation step down transformer's secondary. Please suggest me gate driver ICs for 800V. plus any IC with inbulit isolation? Can you sug
Having tested 3-4 schematics of 1v2 to 5v using discrete components, I have been disappointed by their efficiency and I would like to know if an efficient DIP chip exists for that purpose. Output current is low I would say under 100mA maybe much less, but It must be a DIP packade or a three terminal device, no SMD Any help on this?
My question is, that the voltage accross the potentiometer the dc/dc converter has reaches 32 V. Unable to understand the exact meaning of this sentence. MCP41010 is a 5V part, so ist's power supply and voltage on any pin shouldn't be above 5V by design (7V absolute maximum rating). The question refers to your (yet unknown) circui
Hello I have made this power inverter for a microcontroller project that uses a atmega644 and two 24c512. I have used a 1n5711 for the schottky and I have not built the negative voltage section. The micro seems to start at 4.3-4.4v but the maximum loaded output I
how can i design a LM2577-ADJ Fly-back Regulator for 6V battery to +12V/300mA, -12V/300mA and 5v to +12V/300mA, -12V/300mA http:/
Hello, I search high efficiency, low bom size, low cost, DC/DC converter - input voltage 5-28V (for work with 9-24V PS) - output voltage Adj. ( typically 3.3V or 5V) - output current min 500mA better 1A, but solid efficiency on 10mA - over current and over temperature protection I found a synchronous TPS62175DQCT, but - I do not know if
I am making a AC to DC converter using IC UCC28600 and TPS62240 but I am nt getting how to get the desired output. Datasheet of both the ICs are only telling me the pin configuration and nt any extra details .Can anybody help me to get 5v or 12v output using the same. Links will be very much usefull
No pins of 8051 can accept analog voltages. So you need an adc converter. If it is a matter of reading the applied voltage only, then why don't you rectify the supply. This way you can rule out the negative half cycle... Use a rectifier & a good filter, convert it in dc, read through adc, multiply by 44( if step down is 220v - 5v) & divide by 1.414
I repaired HP nx6320 ac adapter rated output voltage of 18.5v -after replacing the power mosfet(it was open) the output voltage is 19.5v. Now my laptop will shutdown automatically after I plug the adapter in less than a minute of powering on and will not power on again. I think the overvoltage protection of the laptop dc converter is doing this to
hii... quick question...any one knows a replacement IC for OP2177 , with a single input supply of may be 3.3V, 5V or 12V. These are the power supplies available on my board and i dont want to use any DC DC converter as well. Or any website where i can find replacements. Thanks a lot in advance. :)
The MCP1253-ADJ is an inductorless, positive regulating, low noise charge pump DC-to-DC converter. It has an adjustable output of either 1.5V to 5.0V and can deliver 120mA of load current at the desired regulated output voltage. Since the device incorporates an automatic buck/boost feature, it will maintain the regulated output voltage whether the
You can get both 5V and 12V from PC PSU on higher currents. Search for small PC Micro PSU, its around 100W and very small.
What is the dropout voltage for a LM2596 DC to DC buck converter? for 5v 7805 voltage regulators i know that the output voltage drops around 6-7v depending on the regulator but what about buck converters? does it work in the same way? does it even have a "dropout voltage?" thanks You can see in datash
Hey guys, I'm trying to design a dc-dc converter. I've successfully built one that is powered by a 1.5v cell, 9v gen. pupose cell and a 280mAH 9v cell. The problem is when I try to power it with high capacity batteries like a lead acid 6v, 4AH cell, it doesn't work! The inductor heats up and the voltage stays at 1v! The same happens when I po
What is the value of your load and smoothing capacitor? Even a 320k ohm load, drawing 1 mA, will require several hundred mA from your 5V supply. Can your supply provide that? Is the resistance low enough through the power loop to permit this? At startup it will draw a few amperes (if possible). If resistance is too high then the converter may n
First post here. I'm a beginner in electronics and is just starting out with arduino development. So, I'll power an arduino board and a stepper driver circuit with a lead ackumulator 6V 12Ah. Stepper uses approx. 1300 mA the Arduino more or less nothing in comparison. Both the stepper and the arduino run at 5V regulated. I got the suggestion tha
Hi i am going to connect two dc to dc converter output (54V) in parellel to charge a (4 12V) battery. my two dc to dc converter output has voltage difference of 3 to 5v . Is this cause more circulating current in my circuit . if so how i limit it.
You can use a 'Boost converter' or a Flyback converter to get Higher Voltages. Topologies for these are easily available on the internet. You can also try a charge pump type circuit too. But You can not get higher power. If your input power is 5V * 500mA = 2.5W you cannot get power higher than this.
It mainly has to do with the low losses and the high efficiency. You won't get much of a benefit from 5V to 3.3V since the voltage gap is so small. The advantages would be far more noticeable if your input voltage was greater than, say, 9V.
Hi, Can you please let me the impact of current loading for the attached circuit? The attached circuit is a 4-stage dc-dc converter- charge pump. When I give an input voltage of 1V, the output voltage is around 4.6 V using cadence simulations. The expected output voltage is 5V. I am able to understand and see the increase in the output volta
LT3579 is little close to your requirements- 5V in, 12V 1.7A out. I can only guess that if you could provide full 8V as Vin, the output current could go to near 2 A. See if you can go with it....
A buckboost converter will do what you want. It inverts the supply polarity, so you'll need to orient your project to be compatible. Your control circuit will need to detect volt level to the load, and adjust duty cycle accordingly. To show that the same components can provide 12V output, for a range of input between 5V and 20V, here is a
A dual interleaved buck converter could be suitable. Schematic of my The switches must be replaced by mosfets/transistors. Component values are theoretical and can be changed. A single buck conv
dear all please help me for making a supply for led circuit. i am having a 24v, 6A smps & i required 5v 9A dc output for my led circuit
Those current requirements are quite easy, and your software can make a great saving too if well written. If your design requirements allow it, then the MCU can power down for most of the time, just powering up from an internal timer for the sensor read and transmit. Also, you might be able to turn off the sensor power supply if they have a quick s
hello, i am designing a v to i converter, voltage input range is 0-5v dc, n the output current should range from 0-100ma. Please help me with this. please upload the necessary circuits. which opamp is best suitable for this application.
Hi all, I want to design a circuit for supplying 12v to lm741. I have considered to use flyback to fulfil it but I do not sure whether able to supply the voltage to lm741 simultaneously.(because it relies on the switch on/off to supply the +/- voltage) Thus, I design the following circuit, it is two boost converter for supplying +/-12v and th
The adjustable current limit, an external 5v source with control the output current that flows into the load. I think it is the same in the laboratory power supplies. I only drew the basic circuit in psim but haven't selected an IC for it yet, i cant get to understand the working of operation of current limiting in this w
Your DMM have 5 Ohm shunt resistor at mA range and 0.1 Ohm in A range of current measurement! V So 0.5V drop at 100mA .....
hello everyone currently am working on a project to design a boost regulator for an electric vehicle system. The boost converter should be able to convert a varying input voltage from 6 to 12V dc to 13.5V dc which would be used to charge the batteries during the process of regenerative braking. i made the calculation for the boost converter the spe