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5v Dc Converter

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153 Threads found on 5v Dc Converter
Whether 7.5V regulator is initially working and suddenly not working. Or It is not working at all in faulty board (without your touch)... For me it looks like a Dry solder or sometimes if regulator compensation is not designed or on edge we see this kind of behavior....
Hi All I have a current controlled dc/dc full bridge converter with complementary output +85V and -85V that feeds audios amplifier. I'm trying to find the best way of measuring the full bridge output voltage (+85V/-85V) to provide the proper below 2.5V level signal for voltage loop of full bridge. The differential output voltage in steady sate wo
What will be the input voltage to the converter? if it not not much higher than the 5V Arduino input maybe you ca use a regulator.
Are you considering to tie the 5v ground reference with the mains earth ? If yes, I still do not see this as a good decision, particularly if the USB will be used with HID, what mean that will not have a proper safety protection for end user against several disturbances on the mains.
I am using a Buck converter (9V to 5V) and from 5V I am using 1117 3.3V LDO. The output seems fine and everything works but the MCU connected to 3V3 sometimes goes bad. I checked on multimeter and the voltages are proper. I am using 47uF at input of 1117 and 10uF and output. I donot see a very constant output when i check the LDO out
Even the best-laid-out board will have -some- ringing because no zero-inductance trace exists. Putting a probe to the switching output is a great way to ugly up every other measurement point. For such things consider a modest series resistor from probe tip to signal of interest, anywhere this doesn't roll off signal bandwidth unacceptably. The
The problem is the power consumption... at no load the current is about 4mA but as I start drawing 15mA @ 5V the total current reaches approx. 31mA. I intend to use this converter for a low power application using a 3.6V lithium battery, but the converter current consumption of 16mA is beyond the budget. The primary problem in you
Your input signal level is almost nothing. Then if you find a circuit that does anything at such a low level then the output current at 1.5V will be nothing.
The datasheet for the OPA2140 opamp shows that its inputs do not work within 3.5V from the positive power supply voltage.
Thanks hobbyckts. I am using THN 15-1221 with 12V power. Its +-5V dual voltage regulator. I just want it to run it all the time. Can I connect it directly with 12V power supply? The reason not to switch is because I will install the switching ckt for +5V and -5V independendently and this regulator gives me the possibilty of on/off both +-5V with
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 (...)
The PNP transistor inputs of an LM358 dual opamp work perfectly when they are at the voltage of its negative supply pin so it can be a single positive supply inverter when it has a negative voltage to its input resistor. Its output goes as high as +5V only when its supply is about +6.5V.
Most phones have a charger circuit inside that needs 5VDC. If you rectify 5VAC then it produces fluctuating 5V, not steady 5VDC because a pretty big filter capacitor is also needed. How will you make the 5VAC wireless? With huge coils?
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
DC-DC converter 1V to 5V Hi , I'm new in this forum , and in the fist relay sorry for my English writing . i need Dc-dc converter 1v To 5v but i can not use any chip for this problem , any one can help me ?
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
hi i want to charge my mobile phone with "hand cranking option or solar charging" my mobile charger is having output 5v 1.5amp, but important 5v & 800mamp to 1amp can do good. is there any dynamo or solar panel which should be portable and handy to carry around easily? thx in advance
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
Hello All, I don't have 5V, 5A power supply adapter (AC to DC ). I have 12V, 3A power supply adapter. my current requirement is 5A at 5V. So, can (12V,3A) adapter replace (5V,5A) adapter? because 12V power supply adapter has only 3A current capability & i require 5A current & 5V. this adapter will be used to source the power to step dow
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!
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....