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 ...

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1answer
30 views

Powering multiple devices with different ratings from a single supply

I'm planning to power devices with different ratings from a single supply. Some of the devices have ratings such as 5V/2A, 5V/4A, 12V/2A etc., Currently they're being powered with seperate adapters. I ...
1
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0answers
31 views

DC/DC Converter MOSFET switching

I am currently building a SEPIC converter. The signal arriving from the MOSFET driver to the MOSFET seems all good, however the Vds doesn't seem to follow the drivers signal and it makes the MOSFET ...
0
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0answers
27 views

Arduino Ethernet shield

I have some problem with Arduino and Ethernet shield. I have a small project with Arduino. Sensors send data to webserver. Everything works fine when arduino getting power from PC usb but when i give ...
0
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1answer
21 views

current density value for inductor used in boost converter

I am designing boost converter. I need to select inductor for the same. As a new bee i don't know the criteria for selecting the same. (1)what is the maximum current density of copper bare wire for ...
1
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3answers
64 views

How to power a 12V fan simply using a PV panel?

I am an electronics noob and I'd like to create some air circulation through my friends cellar using a salvaged 12V 0,8A brushless DC computer fan and a suitable PV panel. I have searched Ebay for 12V ...
0
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1answer
36 views

DC DC converter control design, PID vs compensators

I have to make a dc dc converter to power a resistive load, and I have reviewed various applications notes, and applications reports like SLVA633 and SLVA662 They make uses of an compensator design ...
1
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1answer
51 views

Boost converter with 2A load

I'm trying to put together a boost converter to take a 11-14.4v input and boost it to ~17v with a max current of 2A. Most of my designs (made either by calculations done by me or a calculator tool ...
0
votes
1answer
49 views

Problem with inverting DC/DC converter

I am using an inverting DC/DC converter from TI (TPS6735)(5V,200ma). When connecting a load of 100ohms it's output dramatically drops to -1V.May I know why it happening like that.Sending my schematic ...
0
votes
1answer
99 views

How to easily get -10V and 170V

I have just managed to control an old LCD of type TLX-1013-E0 using an arduino. I would now like to use it for a project. But it needs -10V for the contrast and 170V for the background lighting. ...
1
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2answers
90 views

TPS61240 Boost converter IC is not working at all?

I am currently using TPS61240 as a boost converter for my project. As i did not have any sample previously so there was no way I could test it. I ordered the IC and placed it on my final PCB directly. ...
0
votes
1answer
66 views

Looking for possible cause for poor regulation in self designed transformer

I am trying my hand at designing and winding my own ferrite transformer for a push pull 1000watts dc-dc converter from 10-12vdc to 400vdc, with copper foil of 0.3mmx30mm for the primary, and copper ...
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2answers
26 views

Stopping Vehicle Mounted Units from stopping abruptly

I have installed a touchscreen computer in my old car. The computer runs on 12V DC power supply. I have installed a standard 24V DC to 12V DC converter to power the computer. The 24V DC input to the ...
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votes
2answers
135 views

Is it possible to add up DC/DC converters in series to create 500V output from 5V input on a PCB?

If I have a 5V input source and I wanted an output voltage of 500V, can I use the output of one DC/DC converter to serve as the input voltage to a second DC/DC converter?
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0answers
61 views

Which DC to DC voltage booster circuit is appropriate with respect to efficiency and stability?

I have a sensor that outputs 2mV/V. So for example, If I excite the sensor with 5V, then the sensor outputs 10mV. So, now I want to boost or double the excitation voltage from 5V to 10V. From my ...
1
vote
2answers
46 views

Peer Review of Buck Converter

The only limitations I can think of are: Comparator/Schmitt not gate output swing time, and Transistor switching time simulate this circuit – Schematic created using CircuitLab BTW, ...
1
vote
1answer
27 views

'Dielectric Strength' parameter meaning for cheap inductior coils

Initially I need an inductor to be used in cheap low-power AC-DC power supply. I'd like to use LNK304 solution: When I reached 1mH coil I found Bourns 77F coils: very cheap (only 8 cents at some ...
-4
votes
1answer
55 views

Programming undervoltage lockout in Boost(Step up) converter

Requirement is to convert 3 V (1.5 x 2 alkaline batteries) dc voltage to 5 V Dc voltage. I know battery voltage decrease with the use and i am required to set a threshold voltage so that if battery ...
0
votes
1answer
18 views

How to view voltage graph in simulink

I am trying to simulate Synchronous Buck DC DC converter I have created the circuit now i want to test it to check whether it is giving me the correct output or not , I have tried the same circuit in ...
5
votes
2answers
88 views

Is there a DC-DC converter topology that can output positive and negative?

E.g. Is there a converter topology that can take a 12v input and convert it to -12 to +12v output with respect to GND? For the record I'd really prefer something that doesn't use rare magnetics. I ...
0
votes
1answer
47 views

Cant figure out a solution for 27V, 3A supply

I have a pretty weird situation I need to produce 27V, 3A from a supply of 27.5V, at first I thought of using a zener as the voltage regulator but I could not find a zener of over 81mW, with zener as ...
0
votes
3answers
48 views

The role of reference voltage in buck converters?

I asked a question here which made it quite clear that it's probably not a good start to make something that I plug directly into the mains. Instead, I've decided to build a low-voltage buck ...
1
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3answers
114 views

Buck converter based switching power supply?

simulate this circuit – Schematic created using CircuitLab I have designed this circuit based on a buck converter. I'm just having trouble finding out which values to plug in. I.E. C1, ...
0
votes
2answers
69 views

Solar Cell to DC-DC converter to Li-Ion charing module, is the DC-DC converter necessary?

I have the following components: 1W Solar Cell (5V at 200mA): http://www.ebay.ca/itm/291435192356 DC-DC Converter (2.5V Vin_min, set to 5V Vout): http://www.ebay.ca/itm/200983543561 5V Lithium Ion ...
0
votes
2answers
56 views

DC-DC & Solar Question

I normally am pretty good with electrics and they taught us about them in a few of my classes, specifically my into to engineering courses. I however don't know a ton about solar panels so this ...
0
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0answers
42 views

How does Mean Well LDD range DC-DC constant current drivers handle dimming?

Mean Well LDD range DC-DC, constant current buck drivers have dimming function. 5v PWM signal allows you to dim the LEDs. Without PWM, you get the full rated current output. Now knowing anything ...
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2answers
178 views

Is it OK to use switching regulators to charge mobile phones (and such)?

I had several issues with car usb adapters (dc-dc step-down regulators), and I'd like to make one myself. Issues: Nokia cell phone refusing to charge Motorola phone power supply circuitry fried ...
2
votes
1answer
74 views

Switching supply burning mosfets, what is happening?

I have been working on a SEPIC converter for an electronic cigarette power supply. This application involves using two 3.7v INR batteries in parallel, rated for an appropriately high current ...
0
votes
1answer
26 views

Does DC DC switching converter needs pot readjusting on input voltage change?

I have adjusted my LM2596 regulator to 5V output with 16V input. I'm about to change the input to 25V. Will my 5v output stay the same or do I need to adjust the pot again ? I can't easily test ...
0
votes
2answers
50 views

Working 12V ups circuit?

I've looked at similar threads on stackechange but none seem to provide an answer. I have 2 devices running on 12v DC. One at 1A and the other at 2A. I had an existing 12V 7Ah lead acid battery ...
0
votes
0answers
66 views

Does anyone know why DC-DC converter have noise

I am running an issue that my custom board has noise come from DC-DC converter after running a while. I used V78W-500 as the DC-DC converter and already replaced a new one. Except noise, the voltage ...
0
votes
1answer
27 views

Periodic Steady State voltage Buck Converter

What does Periodic Steady state mean with regard to a Buck Converter ? Does it mean the normal operation ? Also, From what I read, the net change in the capacitor voltage in the buck converter is ...
-1
votes
1answer
60 views

MC33063 heating problem

I'm using a MC33063 to generate a -9V supply to power 7 TL084's. I'm using a 7805 regulator to power the 33063 circuit. However, the IC and the regulator heats up a lot -- I burned one IC due to that. ...
0
votes
1answer
33 views

Power switchers copper fill / region

When is it considered that too much is too much when it comes to copper fills on DC-DC switchers. I am currently laying out a Buck, 3 Amp max output. Every literature that I have scanned before ...
0
votes
2answers
73 views

LM2623 Regulator

I'm implementing a DC/DC regulator and you can find the datasheet in this link. What I'm trying to do it's basically reproduce the application note in order to have Vin = 12V and Vout = 5V 1Amp but ...
0
votes
1answer
49 views

Design and analysis of Two inductor boost converter [closed]

how to decide inductance values in case of two inductor boost converter?
0
votes
1answer
38 views

Linear Technology PMIC (LTC3566) - powering circuit entirely from VOUT1

I'm looking into Linear Technology's LTC3566 PMIC for an upcoming portable design. Its a really nice PMIC with a buck-boost regulator on-board. Here is the typical application: The reason I want to ...
0
votes
1answer
43 views

boost converter load problem

I am designing a boost converter for wind turbin, with load 12Vdc, 2A. Before I install my boost converter on my windturbin, I putt a test to make sure it work properly. So I use this circuit to ...
-2
votes
1answer
80 views

Solar boost converter unstability

My design of a boost converter is the following Input: 40V/1.5A Output: 100v/0.62A Inductance used: 3.15mH Capacitance used: 220uF (rated 200V) diode switch used: IRF830 (rated Vds=500v) ...
0
votes
1answer
99 views

An current source with UC3842

I find an adjustable current source circuit with UC3842, but without description. The main difference with a voltage regulator is the error amplifier's negative input comes from the current sensing ...
0
votes
1answer
48 views

Inductor Core Loss: Volt-uS vs. Irms vs. Switcher Frequency

For DC to DC application, I see these charts often for inductors, but I don't understand what they actually mean. What does this chart mean, and how does it relate Volt-uS, Irms, & Freq? Edit: ...
0
votes
1answer
36 views

Supply microcontroller and solenoid with the same battery at different voltage levels

I'm working with a microcontroller which its supply voltage range is 1.8V to 3.6V I want to connect a solenoid to this mcu (this solenoid will be activated occasionally). Current–voltage ...
0
votes
1answer
194 views

RPI with power supply alternating between Li-ion battery pack and DC 5V

I have a Raspberry Pi model B+ and I've been trying to design a solution so that I can switch power supply without having to shutdown. The idea is this: I have 2 li-ion 18650 batteries with ...
0
votes
0answers
67 views

MC34063 issue. Switches off every cycle

I am using MC34063 in step down configuration but the converter switches off every cycle. Following are the calculations and specifications: Vin - 9 to 12V Vout - 5V Imax - 0.3A Rsc - 0.36 ohms L - ...
0
votes
2answers
91 views

Can I safely substitute a DC converter for the Macbook's AC adapter?

I want to go from this: to this: The converter would be this: http://smile.amazon.com/dp/B00HVCWGNE or something like it. Does this sound safe? The step up converter would be set to a specific ...
2
votes
1answer
104 views

Standard transformer for higher-voltage dual output flyback converter

Is it possible to modify this flyback converter to get the output voltage somewhere up in the range of +/- 26-60v (preferably 30v or more) without having to make my own transformer? I would also like ...
1
vote
1answer
102 views

Voltage step up for bidirectional current source

I will be using a circuit similar to the following to create a bidirectional current source driving a max load resistance of 10k at a max of 2.5 mA. (based on this article ...
0
votes
2answers
106 views

How to design a boost converter? And how to specify the inductor and capacitor values?

I want to design a boost converter with input of 48V and need to get to a voltage of 100V. How to select the inductor and capacitor values in it?
0
votes
3answers
78 views

Which low pass frequency filter to configure to measure/calculate DC-DC converter efficiency?

I am measuring the DC-DC converter active power (P in watts) efficiency of a TI (Webench) LM3150 PCB that converts 12 to 5VDC. In the answer of question Measuring precisely the efficiency of a power ...
5
votes
2answers
252 views

What is dead time in DC-DC converters?

In a power management integrated circuit (PMIC) documentation I came across a programmable dead-time parameter for a DC-DC converter. What does ...
7
votes
3answers
822 views

How does DCDC save power over an LDO?

I am using a camera module of our custom application. The camera module started consuming more current when compared to a previous board which has all the same settings, chipsets and modules. In our ...