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Questions tagged [boost]

A non-isolated DC/DC converter topology.

0
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1answer
47 views

Adjustable non-inverting Buck-Boost converter failing right after starting in boost-mode

I am designing an adjustable non-inverting buck-boost converter based on LM5176 chip. Adjusting is done by DAC via feedback network, more on that technique can be found here. The input voltage is 32V ...
0
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2answers
40 views

do I have to separate grounds when using opto-coupler in boost converter?

I have a DC-DC boost converter: where the mosfet is driven by PWM signal generated with a PIC18F4550. However, the PWM isn't directly feed in the mosfet. It passes through an opto-coupler first. ...
2
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1answer
36 views

paralleling switching regulators

If one has to design a boost power supply that should generate high output current, it can be a solution to parallel multiple boosters and connect their output nodes to each other. Does this approach ...
0
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1answer
30 views

Backup power supply boost converter TPS61030

I'm developing a backup power supply using a supercapacitor and a TPS61030 boost converter based on this Texas Instruments circuit design. This is the circuit shown in the reference guide: and it ...
0
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4answers
61 views

how to choose components for boost converter

I'm relatively new to electronics and I'm trying to make a boost converter for a nixie tube watch that runs off of 3v. I'm pretty sure that the most current that will be drawn is about 70mA. I'm not ...
2
votes
1answer
24 views

Output voltage of boost converter in shutdown mode (no switching)

Is it common that a boost DCDC converter has an output voltage which is the same as the input voltage, when the switching does not occur? I'm reading the TPS55340EVM-017 datasheet. In the caption ...
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0answers
44 views

IR2301 Boost Converter

I am trying to build a boost converter using the IR2301 MOSFET gate driver. I succeeded in building a buck converter, by following the diagram shown below. The mosfet was driven on a high side whereas ...
2
votes
2answers
76 views

How to deal with “peaks” voltages in mosfet in boost converter?

I'm designing a Boost Converter to go from 5 [V] to 12 [V]. The design I came with is the following: To understand better the design, please note the following: 1) To drive the mosfet I'm using a ...
4
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2answers
96 views

Buck, Boost..etc Is there always an IC for that?

First of all I am still in school so perhaps I have not been exposed to material that may answer this question for me. I have recently become interested in power electronics. I have purchased a book ...
3
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4answers
238 views

How to convert a wide voltage range (1 V-12 V) to 5 V?

I have an unusual application where the input voltage can vary from 1-12 V DC. This must be converted to 5 V @ ~200-250 mA. Since there are no available buck-boost converters suitable for this wide ...
1
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1answer
115 views

What might be the reason for improper turn on of IGBT

Here I am applying 3-phase rectified dc to the non-isolated boost converter, the magnitude of applied voltage is 450V and desired o/p voltage is 475V. Switching frequency of PWM is 28k. I am using ...
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2answers
66 views

DC/DC Converter Output Power Rating

Looking at chips such as AP6502A TPS5430 The output capability is rated in peak and continuous current. Why are they not rated in terms of power? What output voltage is this current rating for? ...
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1answer
139 views

I need 5v@500mA to 12v@5A for 2.5 seconds every 5 minutes

I've run into quite the problem. I have a load that requires 12v@5A for under 2.5 seconds. However, my supply is a USB 5v@500mA. This is not an immediate load. The load will only need to be activated ...
0
votes
1answer
95 views

Parallel 18650 battery pack voltage not stepping-up with Boost converter. Why?

I'm new here and I hope this is the right place to ask! I have assembled a 6P 18650 battery pack out using Samsung 25R cells, soldered altogether with Nickel strips, effectively giving me 3.7V 15Ah. ...
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2answers
259 views

How many amps does a 18v cordless drill draw?

I have bought an old 18v black and decker cordless drill but with broken batteries, for that, I want to buy a boost converter to convert 12v (max 20A ) from a computer power supply to 18v and use this ...
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3answers
55 views

Increase Boost Converter Current

I'm building a portable charger for my phone using a large 2.7v supercapacitor, which uses a very simple boost converter to create 5v. I am not concerned about input current, however, when a load (my ...
3
votes
1answer
74 views

Boost converter with battery issues

I have a battery application. With an 11.1 V battery input, I need to maintain a 12 V, 2 A output as the battery discharges. I bought a 1500 mAh, 11.1 V LiPo battery pack with a 35 C rating and I ...
2
votes
2answers
159 views

Cheap way to power blue LED on coin cell

I need a cheap way to take a 3v nominal coin cell and power a 3.3 forward voltage blue led. It needs to be cheap in production on a large scale, so a rudimentary joule theif won't work. Ideally it ...
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1answer
50 views

About zero voltage switching boost converter designing [closed]

I am developing zero voltage switching in a boost converter for input 48 V and current is 20 Ah. Also: output power is 60 W, output voltage is 200 V, output maximum current is 0....
0
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2answers
219 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 ...
0
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0answers
68 views

TPS61222DCKR 5V fixed boost regulator not fixed? 7V open load and drops linearly with applied load

I have been working on my first SMD pcb and needed to get 5V from 3V batteries. I used the TPS61222 5V boost regulator in this configuration. When I apply a voltage I get just over 7 volts out with ...
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1answer
49 views

Current limit in boost converter

The schematic is made by Great scott (a YouTuber).I need to know can we add a current limit to it by using a sense resistor and feeding the sensed voltage proportional to the current in the feedback ...
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0answers
98 views

Driving a voltage boost circuit with a piezo driver circuit

For a university project, I'm creating my own small speaker. This speaker includes a speaker driver circuit consisting of a transistor and 3 resistors (see figure below). simulate this circuit –...
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votes
1answer
92 views

12/24VDC to 240VDC Circuit For a UPS

I need to build a circuit to step-up 12vdc or 24vdc to 240vdc and have a current rating of at least 50A. I got this really expensive UPS from someone but it takes a 240v battery pack which I don't ...
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2answers
95 views

Simple Buck/Boost/Other Topologies building tutorials [closed]

For educational reasons, I want to build physical DC-DC converters. I would start with simple buck or boost topology. For start, I wish to have a simple gate-drive for switches, without PWM modulation....
2
votes
2answers
52 views

Unstable voltages in boost circuit

This is my first real circuit I've built. I've learnt a lot here, but have some problems that I don't quite understand. It's pretty much just an over engineered alarm clock. The micro-controller ...
0
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1answer
38 views

Boost converter - high current [closed]

Hi I have a generator with a 3 phase brushless motor acting as a generator rectified and smoothed to produce 0-12 volts however theoretically 2hp is approximately 1.5kw and at 12 volts before losses ...
0
votes
1answer
26 views

Why is WLED_SW connected to supply [closed]

I am usin this http://www.ti.com/lit/ds/symlink/tps68470.pdf and in the schematic they tell us to connect the WLED_SW through an inductor to an input supply. I though the WLED_SW(switching node) is ...
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2answers
91 views

How to regulate PWM to control a boost converter

I am creating a simple boost converter following the classic circuit diagram just for learning purpose. The switch is a power transistor controlled by PWM output of an Arduino (with additional ...
0
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0answers
49 views

How to design inductor for non-isolated boost converter?

I am trying to design an inductor of 500uH for non-isolated boost converter from following data. Input voltage Vin=330V DC, Maximum duty ratio Dmax=63%, Switching frequency Fsw=30kHz, Saturation flux ...
0
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0answers
33 views

Optimal method to drive a pair of 10W 28V 0.35A LEDs using PWM for dimming

Using DC/DC boost converter is inevitable because the power supply will be 12V, so the voltage has to be stepped up to at least 28-30 volts. The biggest aspect I am looking at is to have as few ...
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2answers
367 views

Hiw to build UPS using TP4056 and 18650 Batteries? [duplicate]

I have build this UPS battery supply to power a Raspberry Pi using 18650 batteries,using the TP4056 battery charge controller. The circuit as follows: This is working fine at the moment, but I'm ...
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0answers
42 views

Safe to use StepUp-Converter to power LED-Monitor?

I would like to use the following setup, since I already have the meanwell-powersupply. Can anybody tell me if this should be safe as long as I care for good cooling of the Step-Up-Converter, good and ...
0
votes
1answer
61 views

What is the reason of undesired peak current in PFC non-isolated boost converter?

I have attached inductor current waveform of PFC boost converter. After the particular current level, an undesired peak is coming. I have done some study and thinking it might be because of inductor ...
0
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1answer
91 views

Step-up converter with Vin, Vout, GND

I want to use pololu step-up converter https://www.pololu.com/product/2836 in order to power a 5V device with two Ni-Mh batteries (1.3V each). It has only Vin, Vout and GND connectors. I've checked ...
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votes
1answer
38 views

buck boost converter design using LM3759

I have requirement of DC output voltage in the range of 8V-30V and DC Output current to be max. 40Amps. I am using transformer 28-0-28, 7A rating transformer for the AC source. Can I change the ...
5
votes
3answers
755 views

Startup problem in boost converter

The figure below is a diagram of a voltage-mode controlled boost converter. I am wondering how experts solve the start-up problem for this converter. Problem: Assume the output voltage is zero at ...
1
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2answers
63 views

Different logic levels on single input

I have a circuit that has about a 1V input that gets boosted to 3.3V. To enable the boost converter IC, a switch is pressed which causes the enable signal [EN] of the converter to go high (and stay ...
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2answers
244 views

0.9v boost with Tp4056 for 6v Solar Panal?

Can I use it like this... If so how can I limit my solar panel to only output 5v cause my booster can only handle up to 5v input.
1
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1answer
82 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
1answer
63 views

MC34063A Poor load regulation in case of boost and buck converters

I'm using following circuit for a boost converter using MC34063A IC. The circuit is designed for 24 V, 250 mA output. The simulation works fine but the actual circuit on a PCB behaves weirdly. In ...
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0answers
26 views

Using a GE 65W Boost Converter adequate to charge a 13s6p Lion BMS

I have a 13s6p Lion array with BMS I want to charge from a 12v source. This is the Arduino Lion charger project I am attempting After letting the smoke out of an undocumented Chinese boost converter,...
1
vote
1answer
37 views

Phase/Gain margin measurements for current mode boost regulator

I'm looking for where to place a sense resistor in the feedback path of a current mode boost regulator with a layout similar to the one in the picture. Should I place in on the FBL or FBH trace?
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0answers
225 views

How can I simulate a Infineon IR2183 gate driver in LTspice?

I'm making a boost converter in LTspice, initially with ideal switches and comparators, but now trying to use realistic components. For the MOSEFT I just picked one from the available ones that has a ...
1
vote
3answers
201 views

Boost converter in series with buck LED driver

What I want: Drive a 17V, 600mA COB LED from a 5V 3A USB powerbank. Approach 1: Use a boost LED driver. I have looked through Digikey as well as manufacturers' parametric searches to find a suitable ...
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1answer
106 views

Is a MPPT controller basically a buck converter with a feedback geared towards power?

Conceptually, is a MPPT controller for charging (simple) batteries with energy from solar panels basically a buck converter whose feedback loop (which influences the PWM duty cycle) is geared toward ...
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0answers
66 views

How can I calculate the volt-second balance of a boost converter with 2 outputs?

Say I have a boost converter, but it has two outputs and three states. On interval it charges up the inductor, the next interval it charges one output, and the next interval it charges the other ...
0
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1answer
64 views

Continuous Filter design for measure signals from Boost Converter out

So, I found a simulation that uses PID to control the voltage of a DC bus, for voltage measure the author use a "func transfer" in simulink. I wish to know what kind of filter he design and how can I ...
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0answers
30 views

How can I drive a bridge with three states and two high-side switches?

I want to drive a configuration similar to the one presented in Figure 1 of A novel tri-state boost converter with fast dynamics, but use a MOSFET instead of the diode for efficiency. I want to put ...
0
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1answer
77 views

Inductor and Capacitor for Bidirectional DC-DC Converter with Battery

I have to design a bidirectional converter to regulate a DC bus at 250 V with a battery bank at 144 V. My question is how to do it optimally, because I do not know the maximum ripple allowed in the ...