Questions tagged [step-up]

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14
votes
3answers
2k views

LM2586 - Inductor Heats Then Burns

I'm designing a step-up constant current source to drive LED strips (nominal load voltage is about 54 VDC). Requirements: Vin: 18..32 VDC Iout = 0.2 A Vout = 54 VDC (nominal) - 57 VDC (maximum) ...
7
votes
1answer
320 views

How can I rectify up to 85 kV?

I've recently gotten into eletrochemistry, and I found out that if you break through \$\epsilon_{0}\$ with a high enough voltage you can ionize various gasses. I've already wound a 1:1250 EE core that ...
5
votes
10answers
3k views

Best approach to step down 220VAC to 160VAC?

Hey Electrical Engineers, I'm a newbie to electrical engineering (I am a software developer by trade and am starting to work with Raspberry Pis and want to learn about basic circuit design). My ...
3
votes
1answer
182 views

Simple, compact 9V DC to 400V DC step up

I'm attempting to create my own Geiger-Muller counter based on an old, soviet STS-5 tube. I want it to be as compact as possible. I don't want to use ready-made modules, like this one, instead I ...
2
votes
1answer
117 views

MC34063A step up voltage converter

i need change 5v to 12v that it use to supply a device; for this use MC34063A step up voltage converter; this site can calculate the parameter. i have problem all thinks is OK but i have same voltage ...
2
votes
1answer
88 views

Step up with ideal diode

How can be perfect (ideal) diode use in 80V step up instead normal diode? I mean something like this circuit: I'm searched it on the internet and I find just something like synchronous step up, is ...
2
votes
1answer
66 views

Boost converter: doubts on signs voltages

Please, if you could explain me why on step-up (boost) converter the sign of the t-off voltage part is positive in the following equation: Vd * tOn + (Vd - Vo) * tOff = 0 I thought that the ...
2
votes
1answer
1k views

How does such an USB step-up 5V-12V work? [closed]

I just bought a cheap USB 5V to 12V step up converter: Surprisingly, it works very well. There is few place for electronic components (maybe in the USB connector?), how can we do a 5V to 12V ...
2
votes
2answers
52 views

Does boosting voltage using MT3608 from 3.7V to 10V module reduces the Lipo battery capacity?

Suppose say, Iam trying to boost the voltage of my 3.7 Lipo battery to 10V using MT3608 STEUP UP CONVERTER and I need to run 3 LEDs(connected in series) which takes 9V (3v for each LED) If my LIPO ...
2
votes
1answer
119 views

Questions for a personal LED/ATmega328P-PU project

Ok, so first of all, here's I'm wanting to use in this project x14 5mm Red LEDs x14 Resistors (1 per LED due to individual control - how many ohms each? I don't quite understand Ohms law) x1 Battery ...
2
votes
1answer
72 views

Generating +65 V (positive) and -65 V (negative) voltages from two 12 V batteries using cheap step-up converters?

I need to power a 300 W class D amplifier with positive and negative 65 V. As I'm a do-it-yourself guy, I didn't know about positive and negative voltage and ordered a bunch of these normal step-up ...
2
votes
0answers
30 views

Check my battery powered layout

Few days ago I had topic about issue with power inductor crashing circuit. I almost resolved issue without making new by 90%. However sometimes circuit crashes -> I did some updates based on replies. ...
2
votes
0answers
142 views

using a step-up voltage transformer designed for 110V input with a 100V input

I relocated to Japan (where electricity is served at 100V) recently and I am looking to buy a step up voltage transformer to be able to use my TV which accepts 220-240V. While I managed to find some ...
2
votes
1answer
405 views

TPS63070 Buck-boost not bucking or boosting correctly

Can some check my layout since I am using TPS63070 buck-boost regulator and I would like to get 4.7V output at TP12 but I am getting 11.5Vwhich is wrong and don't know why? Base on the Datasheet R1=...
2
votes
1answer
1k views

Creating a Li-on backup for a 12v router

I am building a small battery backup for my router with the 12V 0.5A DC input. Main use is to keep the router powered up during load shedding (aka. power cuts / blackouts ) while my backup generator ...
1
vote
2answers
696 views

Convert 3v to 5v very high amperage using boost converter

I am trying to build a power bank that has 3 output USB ports that can provide 2.1 amp each; it has 8 LiPo cells. So total of 2.1×3=6.3amps so basically 7 amps at 5.1v out. I have built the ...
1
vote
2answers
76 views

DC Step-up Boost Voltage regulator (High Ampere)

I’m working on a project, where I want to go from 5 Lithium-ion cells in series, to 5 Lithium-ion cells in parallel, for versatility purposes i.e. in time, I want to be able to change the output ...
1
vote
2answers
35 views

Nominal Voltage with 18650 cells and DC-DC step up board

So I'm building a simple 12v router UPS and I have trouble with one concept - Nominal Voltage. So the build is very simple, some common 18650 cells, DC-DC voltage step up board, and a BMS (battery ...
1
vote
2answers
52 views

Is output voltage of tps61041 adjustable by microprocessor

This component is a step up converter. I am confused after reading the datasheet http://www.ti.com/product/TPS61041 . It says adjustable voltage upto 28V. But i am not sure if this can be hooked to a ...
1
vote
1answer
77 views

Power a guitar pedal (usually takes 9V power) with a single AA battery

This is not necessarily for real life application, but more for the challenge: would it be possible to power an existing guitar pedal (let's say a Roland / Boss saturation, fuzz, reverb, delay, etc.) ...
1
vote
1answer
683 views

Constant Current Driver with a Step-Up Regulator IC

First of all, although I couldn't find any similar question(s), excuse me if one has been asked before. I want to make an LED driver for 2 different LED strips. One needs about 45 VDC and the other ...
1
vote
1answer
45 views

5v adaptor to 6v 6.4w UPDATED

I have a lot of 5v 400mah to 2a adaptors laying around. Is it possible to use this on an old camera with input 6v 6.4w? The battery is out of the camera and the power would only go thru the camera ...
1
vote
1answer
51 views

Finding the optimal voltage for a sealed transformer

I stumbled across a sealed transformer (step-up) which i believe came out of a neon power supply. Its completely covered in epoxy like goop and the internals cannot be seen. However,on the tin it ...
1
vote
2answers
369 views

3.7V to 5V step up not providing enough current

I'm trying to power up a circuit that consists of an Arduino Nano, 3x 3W stereo audio amplifiers (PAM8403), an audio player module and 20x RGB LEDs. The power source is a lithium battery 3.7V 500mAh. ...
1
vote
2answers
256 views

MC34064 Step-Up Regulator Design

I have a 7.4V battery supply which will gradually discharge and reduce until at about 5V I won't have enough power for my device anymore. Ideally, I need to maintain a 7V (+/- 0.5V) supply rail ...
1
vote
1answer
269 views

3.7V Li-Ion battery powered LED step-up/boost driver

Most quality COB LEDs are driven with around 35V. Are there any quality constant current step-up drivers available that allow a 3.7V Li-Ion battery to be used? Or would I have to use TI's WEBENCH ...
1
vote
1answer
208 views

Boost Converter Inefficiency

I in my design I have boost converter (using PAM2423) which is powered by LiFePO4 (3.2V) cell. It works and gives accurate output but it is very inefficient. I checked voltage on the coil and I think ...
1
vote
0answers
76 views

Why does this 6V solenoid activate on 4 AA batteries but not on a MT3608 step up booster?

I have a JF-0530B 6V solenoid that is rated at 300mA, and if I hook it up to 4 AA batteries it indeed activates on the roughly 6V the batteries supply. However, I also have an MT3608 step up converter ...
1
vote
0answers
50 views

How to bypass step-up voltage converter?

I bought this great solar panel unit on amazon that has lithium batteries, 12v input and 12v output. I use it to power a 5v ESP8266 and I have a step down voltage converter from 12v to 5v on my end ...
1
vote
0answers
46 views

Single brushed DC motor driver not working when using step up voltage regulator

I'm using this Pololu single brushed drive to control a DC motor. Its voltage working range is from 4.5 to 28V and it works fine when I supply it with two 18650 batteries in series. I want to make it ...
1
vote
0answers
83 views

How can I increse 12V and 0.5A DC to 200V DC?

I am very new in electrical circuits and I need help to create a circuit which would create from 12V and max 0.5A input, output with 200V and some small current. Consequently, I need to regulate this ...
1
vote
1answer
107 views

LTC3862-2 Step Up problem, output voltage drop

I'm designing a solenoid powering and control device which is centered around the LTC3862-2 Step Up controller (see datasheet). I have taken as a design start point the typical application shown in ...
1
vote
0answers
94 views

Issue with powering MP3 module with Amplifier

I'm not a electronics engineer/student, so please escuse me if my query sounds a bit naieve. I have a Mp3+FM module (link) which I can power with a regular micro USB charger(or desktop USB). As the ...
1
vote
1answer
519 views

Using a 36V battery with step up converter for 48v kit

I have an e-bike motor ( bbs02 48v 750watts ) which requires a 48v battery. I also have a 36v 13ah e-bike battery. Opening the battery and changing cells connection to make it 48 takes a lot of effort....
0
votes
3answers
126 views

Can a cheap transformer be used for twice the rated voltage?

Can a step up transformer designed to step up from 110v to 220v be used to step up from 230v to 460v? (I'm thinking one of those cheap Chinese auto transformers from ebay, in the 1kva-2kva range) I ...
0
votes
3answers
377 views

Can I use a Step-up Power Converter with Arduino instead of a Relay?

I want to make two projects that use a 12v input, a solenoid valve and a electrical lock. Both need a 12v current to work. I've seen some exemples for both projects that use a relay and an Arduino to ...
0
votes
2answers
35 views

Step-up transformers with varying voltage outputs in parallel on single line?

Just curious if this is possible. I also know this is very simplistic. Say I have an AC generator that outputs 24V. I have three separate devices that each require a different, increased voltage to ...
0
votes
2answers
62 views

What is the importance of dc-dc booster efficiency?

I am going through Texas instrument web bench design suit and get 40% efficiency for some booster circuits if booster can handle the load (Vout and Iout) according to design given by TI what is the ...
0
votes
2answers
81 views

how to demux 100V to 300V DC signal into 8 channels?

I need to 8 channels of 100Vdc to 300vdc, load current 10mA to 80mA. my idea is to use a step transformer to step up dc 5v 1A source to 300Vdc 50mA (typical application). low voltage side of the ...
0
votes
1answer
92 views

How to make a DC to DC step up with multiple isolated outputs? [closed]

I want to design a DC to DC step converter with multiple isolated outputs. I need ten outputs (isolated) positive and GND. Vin: 8 V DC from LiPo battery. Number of isolated outputs: 10 Vout: 50 V, 10 ...
0
votes
1answer
112 views

Will my step-up converter module burn if I connect a power hungry device to it?

I recently bought a step-up converter module. It is rated to work at 24 volts and output MAX 28 volts and 2 amps. I will connect it to a source that outputs 5 volts and 20 amps. If I connect a power ...
0
votes
1answer
76 views

3Phase + Neutral, 208VAC distribution and conversion to 1Phase 120VAC

Question 1: How to convert 3phase+Neutral 208VAC supply to 1phase 120VAC? Can I tap off one (any) leg of the 3phase supply and use that to Neutral to get the 120VAC? Or do I have to use all three ...
0
votes
1answer
35 views

Does V_EN have to be equal to V_IN to be “high” on an step-up dc-dc converter? (MT3608 on/off control)

I have an MT3608 step-up converter[PDF], that I'm using to power a small fan (DC 12V 0.1A) with a DC 5V (4A max) power supply. On my board V_EN and V_IN are soldered together ex factory, meaning it'll ...
0
votes
2answers
41 views

Can I use LM3481 for a system where no-load status can occur?

I have made a step motor driver board with LM3478 to supply 24v from 12v input. LM3478 The problem is that a user can power the board without the stepper connected board which drive the board to no-...
0
votes
1answer
89 views

Battery powered step-up converter not gives enough amps

I am creating two part PCB running on Li-ion battery 26650 (3C discharge rating, max capacity 5000mAh) powering few LED strips with controller. PCB 1 (schema 1) has step-up converter MT3608 which ...
0
votes
1answer
63 views

Is it possible to provide DAC voltage to VOUT_ADJ to control Vout?

I am using a TPS61391 booster. I need to adjust Vout via a DAC connected to FB pin voltage divider (VOUT_ADJ). is this possible? DAC voltage varies from 0 to 3.3V.
0
votes
1answer
105 views

Step-up converter current limit 2A [closed]

In the specification for the step-up booster is max. output current limit 2 A (or any other value based on the specific booster). Does this limit apply for the whole range of supported voltage or for ...
0
votes
2answers
266 views

step up from 2 AA to 3.3V [closed]

I've read some related questions, but I was not able to find/understand a proper solution I'm using 2 AA batteries to power a SAMD21 MCU (arduino mkr series), a DS18B20 probe and a MCP3424 ADC. My ...
0
votes
2answers
628 views

PCB GND Guard ring

In my design I am using the step-up converter TLV61046a. As this is the switching device, I would like to maximize EMI reduction. I would like to hear your advice if this GND guard ring in my layout ...
0
votes
1answer
185 views

Specifying parts for Induction Heater; how to determine current requirements at transformer? [closed]

I'm working on specifying parts for the following circuit: I intend to have a very large work coil, (like 12" diameter) so I'm expecting to need a lot of power. I'm on a tight budget, though, so ...