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
19 views

Experimental efficiency curve of a buck converter

I made a buck converter, And I tested the circuit under following conditions: Vi = 32V R = 6.8 ohm Fs = 125kHz I got this result: I think it's kinda odd that the difference between ...
0
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1answer
39 views

How To make Variable Power for a Trolling Motor

I have a trolling motor that works, but the circuit board does not work. I am looking for a way to make it a 3 speed motor. I have a switch that allows for 12 Volt input and then based on the ...
0
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1answer
97 views

Why does the capacitor takes the high-frequency current at the output of a dc-dc converter?

Lets assume that delta IL = 3A if the switching frequency es 10khz, the capacitive reactance will be Xc = 0.0397 ohm, it makes sense to asume that the current ripple will go to the capacitor, since ...
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0answers
36 views

Fixed ratio dc to dc converter with isolation [on hold]

I am relatively new to electronics.I need to have a fixed ratio DC to DC converter with isolation in my design.(The ratio is approximately 6. For eg, 24 V input must output 4v). Is there a way to ...
1
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2answers
62 views

Step up converter - voltage drop on load

I decided to build step up regulator to power DHT22 (temperature sensor) from two AA bateries. The DHT22 needs 3V (or 3.3V acording to some datasheets) for operation. I picked up MCP1625 (from ...
2
votes
0answers
29 views

Switch utilization in dc-dc converters

In the book, Power Electronics, by Need Mohan at the end of chapter 7, it is this image: Relating the output power and the power that the transistor is handling, I want to reproduce this plot for ...
1
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2answers
62 views

Buck converter after 50Hz transformer

I plan on designing a variable power supply (1-50V, isolated), able to provide a power of about 50W. For efficiency's sake, linear regulation is out of the question. The natural thing would be to ...
0
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2answers
56 views

Are charge pumps better than boost converters since charge pumps do not use inductors?

Charge pumps use capacitors and not inductors. https://en.wikipedia.org/wiki/Charge_pump Boost converters require inductors. https://en.wikipedia.org/wiki/Boost_converter Both charge pumps and boost ...
1
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1answer
31 views

Guarantee Continuous conduction mode dc/dc buck converter

In a buck converter the continuous conduction mode it depends on following equation: $$ L_{min} \geq \frac{(1-D)R}{2f_s} $$ For a fixed load and inductance value, the operation mode will depend on ...
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0answers
17 views

Can I use AL- capacitor to pth05050w?

Now, I'm trying to test with PTH05050WAH module. PTH05050WAH MODULE PIP .8-3.6V 6A HORZ T/H My power source is SMPS 5V 2A adaptor and I connect directly the 5V power source of adaptor to 3 pin of ...
0
votes
1answer
54 views

1V to 5V dc-dc step-up circuit @ Iout = 1A

I am trying to convert unregulated 1V input to 5V, 1A output within a project I am working on. I have tried working with MAX757 but could not get it to work. It takes a couple of weeks for maxim ICs ...
1
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1answer
27 views

PSpice Simulation of CE8301

I have been working on a project that requires me to boost 1V to 5V. I have found a ready-to-use boost regulator that gets the job done. The problem is that I need to get the circuit simulated on ...
-1
votes
1answer
43 views

what kind of type resistor do I need in PTH05050W? [closed]

I found what I need to apply my xilinx virtex5 FPGA board, PTH05050W 6-A, 5-V INPUT NON-ISOLATED WIDE OUTPUT ADJUST POWER MODULE at www.ti.com. Maybe, this need to change by resistor to set output ...
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0answers
15 views

Estimate realistic parameters of transformer for educational simulation of DC/DC converter

I am trying to simulate a full bridge DC/DC converter with SimPowerSystems for educational purposes using the datasheet of a specific converter as example. For the simulation I need the following ...
3
votes
1answer
75 views

Is it good practice to couple the grounds of isolated supplies with capacitors

I once saw the following on an isolated dc/dc converter data sheet and have been doing it ever since with my dc/dc converters, but I wanted to ask to make sure it actually makes sense. Whenever I ...
0
votes
1answer
35 views

Does it matter what the input voltage is to a DC/DC step-up converter?

I have a converter that outputs 5v and 1 amp. The input voltage can be 2.5-6 volts. Does it matter as long as it is in the range? Also, will the current draw from the batteries differ if I change the ...
0
votes
2answers
161 views

Is my 600W boost broken or malfunctioning?

I'm asking this mainly as a sanity check and to distinguish between whether I've just done something wrong or need to buy a new one. I have a "600W" boost converter based on the UC3842A SMPS w/ CC ...
-1
votes
1answer
80 views

Automatic adjusting output into automatic adjusting input [closed]

I have a solar panel with a built-in 6-18v auto adjusting output (based on draw) and a step up/down 1.5-24v DC-DC converter with an auto adjusting input. I was thinking of using them in conjunction ...
0
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3answers
76 views

Converting voltages using LM337

I have 2 questions: Is it possible to generate -35V from LM337 regulator with -12V in input?? The voltage output from LM337 is supposed to follow this equation, -Vout=-1.25(1+R2/R1)+Iadj.R2 but in ...
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2answers
70 views

unknown component in datasheet

im using xl6009 dc to dc converter , in page no 7 of datasheet the sepic inverting topology is show which generates 12 and -12v .my doubt is what component is used, is it a transformer or coupled ...
1
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0answers
117 views

convert [-24V,24V] range to [0V,3.3V] range

I need to realise a circuit that converts an analog signal from [-24V,24V] to [0V,3.3V] before sending that signal to an ADC "MCP3208", I found the circuit in the picture above,it works perfectly in ...
2
votes
1answer
34 views

What is a point-of-load converter?

Can you please give me a definition, or at least a more specific context, of the term "point-of-load" converter/regulator? I have seen around explanations on related products or applications but no ...
4
votes
1answer
109 views

What's an efficient way to get below the standard 1.25V on buck converters?

So, I purchased a buck converter which was advertised to be able to range down to 0.8V but, as you can probably guess, it only goes down to 1.25V which I understand is the reference voltage for the ...
0
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1answer
29 views

synchronous buck converter with different MOSFETs

do you know if it is possible to use different type of MOSFETs in a syncronous buck converter for the hi-side and the low side switch? How does this improve the converter efficiency? Thank you
1
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1answer
34 views

Negative voltage from positive output DC/DC

my DC/DC ( http://www.ti.com/tool/PMP10077 ) has 200 V output on pins +HV and GND. Can I get negative output by simply swithcing the meaning of output pins -> I will use +HV as GND, and GND as +HV. I ...
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votes
1answer
55 views

Two DC DC converter with different output - In series or parallel?

Source: LiPo Battery (13V - 16.8V) Consumer #1: 5V (RaspPi) ~1A Consumer #2: 12V (variouse) 0-3A (plus ~1A if series) DC/DC step down: two LM2596 Which would be the better solution: LM2596 #1 on ...
0
votes
4answers
84 views

Implement ac-dc converter for low frequency and very low voltage without external powering?

Iam using a basic cascade voltage multiplier to boost and rectify the 0.3v ac signal. The circuit rectifies but the boost is very less. So I thought of using LTC3105 after this stage to get a ...
0
votes
2answers
88 views

Isolated 1-10V (or 0-10V) output

I need to control an LED driver with analog 0(1)-10V control input. This control device should be very cheap and compact so until now I made a schematic which uses the fact that those drivers have ...
-1
votes
1answer
41 views

How to reduce VOC of solar panels to match the MPPT of inverter

I will have an off grid solar panel system to run my deep well 5,5 Hp water pump. I already got 24 of 250Wp 36,3 Voc panels and 3 phase Delta VFD C2000 inverter/driver. for this system I need to wire ...
-1
votes
1answer
83 views

Convert 24V dc to negative 24V dc [closed]

My circuit is supplied by a 24V DC generator, but I have amplifiers in my circuit that need to be supplied by 24V and -24V, so I need to generate -24V dc from the 24V that I have from the ...
0
votes
2answers
39 views

Can I feed a 5V boost converter with 4xNiMH cells?

The spec page of my DC-DC boost converter (couldn't find a datasheet) says ”the input voltage should be kept below the output voltage”. And 4x the nominal 1.2V from an NiMH cell is below my 5V output ...
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votes
1answer
39 views

Does current flow through the potentiometers of buck and boost converters?

I'm working on a project where I'm replacing the trimpots on a buck converter and a boost converter with proper potentiometers. The new potentiometers will be wired to the converters instead of ...
0
votes
1answer
56 views

How to make a -10 V DC power supply?

I need to make a -10 V dc power supply (I_max = 250 mA) to implement in a system where +-10 will be used for powering opamps and a push-pull. I have a 24 V dc available as power supply. Regarding ...
3
votes
1answer
65 views

Effect of using two buck converters in series

Are there any limitations of connecting two non-isolated buck converters in series? Just taking the output from the first converter and connect it as the input of a second converter to produce two DC ...
0
votes
0answers
36 views

Power good state when chip is off

DC-DC regulators generally have power good signals. I would like to know what's the state of the pin when the regulator is disabled (enable being low) or there is no input power. I belive since the ...
1
vote
2answers
101 views

why Boost converter output voltage decreases at high power?

I am implementing non-isolated Boost Converter, capable of handling a power of 1Kw and output voltage is to be maintained at 400V at an input voltage of 120V . At smaller load current (around 2.5 Amp ...
3
votes
2answers
89 views

Designing for DC voltage drop in low gauge wire

Are there any types of DC low voltage power supplies on the retail market that can accommodate for long wire runs (18 gauge wire). I am worried about voltage drop and power failure; I'm trying to ...
0
votes
0answers
30 views

LM5106 gate driver for synchronous dc-dc boost converter: protection of HS pin

I am using a Texas Instr. LM5106 as the gate driver for a synchronous boost converter. I read in the datasheet (par 10.1.1 - point 1) that Transient Voltages Below Ground of the HS pin may hinder ...
0
votes
1answer
59 views

Voltage Regulator that gives an output of 12V and 10A [closed]

I'm looking for a voltage regulator that takes 9V-20V input voltage and gives an output of 12V and 10A. I found a couple of buck-boost regulators that can do that but i just cant seem to simulate it. ...
12
votes
5answers
1k views

Anything special to consider when running a 12v “Bus” throughout my house?

I've recently begun playing a lot with tiny programmable computers/controllers (like the Raspberry Pi and the Arduino), and I'm planning to distribute several throughout my house as various sensors. ...
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votes
1answer
96 views

Issue in High side Mosfet in bidirectional Buck Boost Converter?

i am making bidirectional buck-boost converter. The schismatic of bidirectional buck boost converter is attached here. Buck Mode = when PWM is applied to Q1 , it work as buck converter. when q1 is ...
0
votes
2answers
60 views

DC-DC + LDO in series [closed]

Typically the question is: after having selected all the components in a schematic minus the Power Management systems, we then define which voltage and current each block will use, then we need to ...
0
votes
0answers
35 views

Anti-ringing boost converter

From the site, page 7, there is a functional block diagram of TPS61020 boost converter. As you can see there is an anti-ringing there. Does anyone here have an idea how this block is implemented? ...
0
votes
1answer
28 views

Boost converter with pulse skipping modulation

With boost converter using pulse skipping modulation, how is it possible for it to keep output voltage constant when load current increases? When load current increases, the output voltage decreases ...
0
votes
1answer
54 views

Advice on Buck-Boost Stage

In one of my circuit, the incoming variable voltage(8.5-24V DC) from the source will be first stepped up to 17V using a boost converter. The same output shall then be stepped down to different ...
3
votes
3answers
195 views

Why isn't Ohm's law working for this simple circuit?

I have a 70W 12V-500V DC power converter, and something in these pictures is not adding up. I run the 500V output through a high-voltage 332kΩ resistor. Now, using the left multimeter I ...
0
votes
0answers
41 views

How to power a 12v LED in a 9V 6LR61 battery powered circuit

What would be the most simple, efficient and cost effective way to power a 12V LED in a 9V battery powered DC Circuit? I cannot substitute the 12V LED, as its part of an IP65 vandal proof stainless ...
2
votes
2answers
171 views

Eliminate standby leakage current of output capacitor in a DC/DC converter charging a battery

I am using a DC/DC converter to charge a battery. The output current of the converter is about 6 Ampere at 41 Volts. I'm trying to eliminate the standby leakage current of the output capacitors in ...
1
vote
3answers
429 views

DC-DC Converter vs Switching Regulator

As an example, lets say I'm looking to convert 24V to 12V for a circuit that draws 800mA. I understand that a standard linear regulator is going to dissipate 9.6W so is out of the question here. So ...
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votes
3answers
67 views

Resistor or DC-DC converter?

I have 19.5VDC input voltage and a 12V fan to be operated. Should I use a resistor connected in series to adjust the voltage on the fan or a step-down DC-DC converter? The latter might be overkill but ...