# Questions tagged [step-up]

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### 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) ...
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 ...
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 ...
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 ...
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 ...
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 ...
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 ...
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 ...
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 ...
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 ...
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 ...
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. ...
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 ...
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=...
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 ...
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 ...
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 ...
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 ...
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 ...
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.) ...
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 ...
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 ...
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 ...
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. ...
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 ...
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 ...
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 ...
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 ...
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 ...
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 ...
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 ...
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 ...
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 ...
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....
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 ...
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 ...
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 ...
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 ...
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 ...
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 ...
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 ...
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 ...
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 ...
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-...
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 ...
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.
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 ...
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 ...