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 ...

learn more… | top users | synonyms (1)

0
votes
1answer
42 views

half bridge converter weird primary current waveform

I build up a half bridge converter(as illustated in figure), today I measured current of one of the primary switchs(MOSFET), but something seems weird, while I expecting a triangle current shape, the ...
0
votes
0answers
28 views

Energy harvesting from multi source in same time

I see there are a lot of energy harvesting IC's capable to use with a solar panel or Rf to DC systems. Lets say both solar to DC panel and Rf to DC circuits outputs 1.2 V potential, is it good to ...
8
votes
4answers
630 views

Remove audible noise generated by buck converter

I'm dealing with a buck converter using an ISP452, an inductor and a capacitor to act as a buck converter driven by a PWM signal coming from a microcontroller. Some part of the circuit is producing a ...
0
votes
1answer
62 views

Working on a high current USB charger

Title says it: I'm working on building a high current USB charger for my devices so that I can integrate USB ports into my headboard. However, I'm having a few glitches. When I plug in a device, the ...
3
votes
4answers
341 views

Is it possible to eliminate output ripple of SMPS's by using two parallel SMPS's to produce outphase outputs to each other?

simulate this circuit – Schematic created using CircuitLab Obviously it can not be that way. But why? Imagine one converter with a phase detector of its switching frequency, outputs a ...
0
votes
2answers
56 views

Vout = 12V, Iout= 15A, 180 W Switching regulator [closed]

I have experience of designing DC-DC converter upto 5A. But now for one of my application, I need to design circuit with following specs: Vin = 24 - 25 V, Vout = 12V, Iout = 15A, Pout = 180W So, ...
1
vote
3answers
69 views

How to use the power good signal properly?

I'm powering a circuit from a buck converter. I've seen that many buck/boost converters (for example, TPS62177) have a PG or power good output signal which ...
0
votes
0answers
26 views

High-current dc-dc boost converter

I have been looking into powering 4x Anaheim Automation 15Y102D-LW4 by two Allegro 3977SLPTR-T driver chips, 2 parallel motors per chip. In order to get the maximum performance, I need to be able to ...
0
votes
2answers
37 views

Multi cell lipo charging or boost converter

I'm working on a prototype for a project that needs to drive a stepper motor at 12V and 2A. It needs to be powered by lipo batteries, have all of the charging circuitry in the device, charge through ...
0
votes
1answer
61 views

DC/DC Converter Instant Off

The output voltage of my DC/DC converter and my power supply both slowly descend. I believe this is due to capacitors being close to the output of each device. I want to get an instantaneous, or as ...
0
votes
3answers
48 views

Circuit for solar panel

I have done with a solar panel powered mobile charger. This is how it is now Solar Panel(5W,8V(max),0.59A(max)) -> 7806(5.4V normally) -> Female USB -> Mobile Since 78XX just reduces the ...
2
votes
3answers
102 views

MOSFET gets unusually hot in a SEPIC converter

I have constructed a SEPIC converter which is to be used for maximum power point tracking (MPPT). For simplicity, I am currently just using the hill climbing algorithm with fixed duty cycle steps of ...
0
votes
2answers
24 views

Help connecting solar cells to be 12 V

I just purchased a lot of 40 solar cells each with 1.8 W, 0.5 V, and 3.6 A. This gives a total of 72 W. Ideally, I would like to connect the cells in a manner to yield 12 V. I know I can connect two ...
1
vote
2answers
25 views

LT3750 Capacitor Charger DONE pin

I'm drawing out a circuit using Linear's LT3750. I don't quite understand the DONE pin. What I want to do is add an LED and have it come on when charging is done. Like in a camera. Can someone suggest ...
0
votes
0answers
84 views

How to get a constant voltage (8.5 - 16 V) at 70mA from a USB port

I'm working on a project with a sensor that needs power voltage between 8.5v to 16 v, and need 70mA current for work. I searched on the internet and I found some ICs but I'm worried about the current ...
5
votes
2answers
563 views

Supercapacitor bank charging process breaks down dc/dc converter

I'm an undergraduate student and I'm member of university's team, which deals with the development of an electric vehicle. One of our projects, is the implementation of a complete regenerative braking ...
0
votes
0answers
63 views

LM2722 mosfet driver failure

I am dealing with an application to drive two thermoelectric modules and control them through PWM signal coming from a microcontroller. An LM2722 driver controls two Mosfets transistors. The signal to ...
3
votes
2answers
122 views

Connecting grounds of DC-DC converter at one point

There have been questions regarding connection of grounds of an isolated DC-DC converter. However I could not find anything that discusses whether the two grounds (when connected) should only be ...
1
vote
2answers
64 views

Is this a viable mini wind turbine setup?

I'm going to build my first wind turbine. I have already constructed the prop, 5 blades 50cm long from PVC pipes. I've searched for a decent sized motor and charge controller. The turbine will be ...
0
votes
2answers
61 views

Charging lead acid battery using boost/buck converter

I plan on permanently connecting a 12v lead acid battery to my home made wind turbine (dc). I already have a dc-dc buck/boost converter so I wonder if i can use that to charge the battery. ...
1
vote
3answers
57 views

Core loss appearing in buck converter ripple current

I have been told (and have also seen experimentally) that an inductor with a high core loss will introduce "glitches" to the ripple current in a switch mode power supply. I have tried researching ...
1
vote
1answer
64 views

Voltage Mode Control of a DC-DC Buck converter

My previous question was about a hysteretic-style buck converter: Buck Converter Control Scheme- Why isn't just a comparator not enough? By what I gather from previous answers, a ...
0
votes
4answers
97 views

Can I use a DC-DC buck converter with an arduino

I'm just starting out with electronics and arduinos, but I want to ask if i'll be safe using an LM2596S DC-DC step down buck converter as the regulator for my arduino project? I have a few to hand ...
0
votes
3answers
87 views

Does a boost converter lower the source current of a solar panel?

I am trying to build a solar powered phone charger using small size solar panels. I have two solar panel connected in series, each of them are 4 V and 50 mAmps. When I connect the solar panels to the ...
4
votes
3answers
85 views

Buck Converter Control Scheme- Why isn't just a comparator not enough?

I have just begun working on a student project - full chip design of a DC-DC buck converter. I am supposed to come up with some control schemes for the converter before understanding the standard PWM ...
0
votes
1answer
80 views

CC/CC Buck Schematic (Circuit Help)

I found a schematic for a CC/CV buck using the LM2596-ADJ. I was curious if anyone knew exactly what the op-amp (LM358) is doing, as well as how the potentiometers are adjusting output current and ...
2
votes
2answers
101 views

MP1584 DC/DC step down converter cause whine in audio, how to avoid?

Short story I use the MP1584 to step down 5VDC to 1.5VDC to power an audio equalizer taken from a Panasonic walkman (RQ-P255) from the nineties. However this is working great, sound is great, it ...
3
votes
1answer
82 views

High Amp DC-DC Buck converter

I'm a bit of a newbie to electrical work much more than Arduinos so I apologise if there's any inconsistency in what I'm asking! I have a little electric vehicle project on going, a go-kart, I'm ...
1
vote
2answers
76 views

i have a circuit in which some components need 5V and some need 3V.

should i get 3V battery and go for a buck boost or 7.4V battery and go for a voltage regulator? which is easier and better to use?
1
vote
1answer
56 views

What would happen if you connect a solar panel to a buck-boost converter?

What would happen if you connect a solar panel with the following characteristics: Max Power:3.5W Voltage: 6V Open Voltage: 7.2V To a buck-boost converter that convert an input voltage in the ...
1
vote
1answer
84 views

Buck boost converter - High current 15A@12VDC +

I don't have much experiences from designing and understanding more complex circuits. I only have basic knowledge how different components work and how to create and calculate simple transistor ...
0
votes
1answer
76 views

How to step down from 5VDC to 3VDC? [closed]

just a newbie here. I just want to ask how I can step down my 5vDC adapter to 3VDC? Cause I'm afraid that my LED lights will burn out. Thank you so much for answering.
1
vote
0answers
51 views

Layout recommendations for an older DC/DC

I'm currently working on getting an old voltage regulator chip from TI to work. The TPS65530 is an 8-channel DC/DC Converter and thus quite crowded. I have not been able to find a reference design ...
0
votes
2answers
162 views

Simplest way to convert 78 VDC to 3.3 VDC?

I'm doing a ESP8266 implant on a LED light driver, which converts 220 VAC to 78 VDC. I need to power the ESP8266 with 3.3 VDC. What is the smaller, cheaper, easier and efficient way (if any) to do ...
0
votes
0answers
37 views

PWM Pattern for Isolated Boost Converter in PSIM

i have to simulate full bridge Isolated boost converter as shown in the figure. i am very confused about the PWM pattern. how can generate for four cycle in PSIM. please suggest me the how to set the ...
1
vote
1answer
27 views

Analysis of the effect a opposing voltage source has to a buck-converter's output?

I have two voltage sources Vps and V1 connected in series: simulate this circuit – Schematic created using CircuitLab There is also Load(1) connected which I believe is in series as ...
0
votes
0answers
53 views

What could explain a microcontroller reset when I suddenly feed a DC-DC converter?

We built a DC-DC Converter using a micro-controller to create and to set the frequency and duty cycle of the PWM signal. When we start supplying the converter from zero and increasing the voltage ...
2
votes
1answer
64 views

Diodes in boost/buck converters?

In either dc power converters, there must be a diode. I don't understand the need for it? Would a buck/boost converter function without a diode? Also, what is the maximum reverse voltage for a diode ...
-1
votes
1answer
136 views

How to Convert 12Volt DC Automotive Battery Charger to 1.5V [closed]

I'm not an electrical engineer of any sort but was wondering if someone wouldn't mind sharing how I could choke a common AC to DC 12 Volt automotive battery charger down to 1.5V output while retaining ...
2
votes
1answer
57 views

Crowbar circuit and choice of the SCR

I am building a Crowbar circuit for one of my sensor which is power supplied through a Recom Power R-785.0-0.5 (datasheet). The crowbar SCR is controlled by this IC. I am having troubles in selecting ...
0
votes
0answers
66 views

burning DC/DC converter at start-up

I followed a design on Webench to convert 24 Vdc to 3.3 Vdc. Schematics is the same but changed the layout a little bit I am having a serious problem on the highlighted part (24V in), my modules ...
1
vote
0answers
11 views

Active clamp forward converter (High side and lowside) with synchronous rectification

Please help me with the detailed description of Active clamp forward converter with synchronous rectification.I have seen a lot of journals regarding this and I am getting more confused when I ...
0
votes
0answers
48 views

UPS circuit for PicoPSU-powered PC

I have a small home server, which I power through a stabilized AC/DC power supply (12V/8A), followed by a PicoPSU (which is a small DC-DC converter that handles the voltages other than 12V which a PC ...
0
votes
2answers
80 views

Boost converter and a pulsed load

I'm working on a design which needs a 9V supply. This is currently provided by a 9V battery, but I'm looking to change to a lithium battery (3.3 to 4.7V). This supply has a pulsed load of up to 2A, ...
0
votes
0answers
84 views

CCM and DCM for buck/boost converters

I just want to clarify some concepts about CCM and DCM for converters. Am I right to say that Imin=0 is the boundary for it to conduct at CCM? So, if Imin<0, it will become DCM? Or is it when ...
9
votes
2answers
237 views

What to do about very hot planar inductor?

What I'm doing: I am designing a DCDC converter to generate ±24v from an incoming supply of 18v - 36v. For this I am using the TI TPS54160, and following the document Create a Split Rail Power Supply ...
-2
votes
2answers
111 views

Charging lead acid batteries using DC-DC Buck Converter

Is there any disadvantage using an 18V 2A transformer with an adjustable DC-DC buck converter(link below) to charge a 12v 7Ah battery ? I know that the charging current must not exceed C/10 (700mA ...
0
votes
1answer
83 views

How do “Inverter” or “IGBT” welders control CC and CV output?

I have a question on welding units. A lot of the newer units these days have "Dependable Fairchild or Infineon IGBT (non module)", "MOSFET design for Hobby use" and I can't tell if all of this stuff ...
0
votes
0answers
38 views

Confusion with MC34063 Vsat

I'm currently designing an e-ink panel driver. My choice is MC34063 for generating required voltages and I want to use two of these for step-up and inverting converters. However I'm somewhat confused ...
-3
votes
1answer
55 views

Which device has lowest power consumption? [closed]

In one of my project I need to scale down 12V dc to 8V. For this purpose I know that I can use, Voltage divider using two resistors. An opamp with +ve feedback A dc-dc converter I know that I ...