Questions tagged [boost]

A non-isolated DC/DC converter topology.

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1answer
88 views

Why isn't my 5-to-24VDC boost converter supplying enough current to turn a 24 VDC motor?

UPDATED 2020-03-27 based on feedback. Closing this since it is basically a problem delivering current with a boost converter, and there are many other issues similar. Problem: I cannot get a 24V ...
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1answer
57 views

Boosting 18 V drill battery to 60 V to power LED lights, problems with voltage stability

I have a bunch of Dewalt 18 V batteries and 2 LED shop lights that I converted to DC, specifically 60 V, 1.5 amps per strip. I have had mixed luck and I am looking for a better approach. I have no ...
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2answers
71 views

How to implement step-up DC-DC converter with reverse current capability

I am trying to step up voltage from 24V to 36V using a boost converter, specifically the PI3740-00-LGIZ by Vicor, in order to power a motor. However, I want to be able to do regenerative braking with ...
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0answers
29 views

Boost converter - low inductance and discontinuous or high inductance and continuous?

I'm working on a battery powered application and I need to step up from ~3v to ~25V. I'm trying to balance the peak battery loads vs the overall performance. I'm torn on the inductor. I'm at ~2MHz ...
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2answers
67 views

how to measure current of high voltage 150Hz pwm signal?

I have a step-up converter which produces 130V DC and 12mA max current I generate 130V pulses using an optoisolator PWM duty vary between 10 to 50 (255 max) at 150Hz frequency, but my load (...
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2answers
82 views

Boost converter 3.3 to 5V MAX756

I want to step up my power supply from 3.3V to 5V. For this I choose the MAX756 for his price and his availability. But I don't understand the pinouts... Pin 1 : I can leave it on fly ; Pin 2 : To ...
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1answer
54 views

Why doesn't this diode conduct in a boost converter?

It seems like current should pass through the diode even in the "on state" because the current is flowing in the right direction. Is it because the current will be too low because of the closed switch ...
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2answers
88 views

Is a 24V-48V 40A boost converter possible?

I would like to produce a buck/boost converter that can convert 24V to 48V with a 40A max. output current. It would be used to control a DC motor, specifically the MY1016Z3 DC motor. I cannot use a ...
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0answers
19 views

Non-ideal inductor effect on inductor current in a quadratic boost converter

I'm studying a quadratic boost converter and I'm expecting to see in the lab a constant current in the inductors, with a small ripple associated with energy exchanges between the capacitive and ...
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2answers
41 views

Through hole buck-boost ic [closed]

I'm looking to create my own buck-boost converter but want to test it on a breadboard. I have done online searches but only surface mounted ICs show up. The Texas instruments TPS63061 looks ideal for ...
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2answers
96 views

Create a power supply that accepts 3.7v - 5v and outputs 5v

Hello i was wondering if there is a solution for a power supply to accept a range of 3.7v to 5v and output a constant 5v. Im trying to get a low powered circuit to be able to be powered from either 3....
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2answers
80 views

Boost converter: Finding conducting period for diode in DCM (theoretically)?

I am having a problem finding the conducting period for the diode in a boost converter operated in DCM (theoretically). It is part of a multiple-choice assignment with three questions related to the ...
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5answers
137 views

9 V to 360 V via boost converter?

So I'm fairly new to electronics and I wanted to make a boost converter. I was trying to get 360 V from 9 V and ran my circuit through LTSpice and EveryCircuit but it didn't seem to work. It's a ...
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1answer
62 views

What is wrong with this LCD backlight boost converter circuit

I have been working with a dev board with the LCD backlight circuit shown below. The boost converted used is the TPS61041. On page 18 of the datasheet, there is an example of the backlight circuit ...
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2answers
97 views

How can I tell if this boost converter is in continuous or dis-cont. mode?

I'm trying to intuitively understand a boost converter, so I've built a variable duty-cycle oscillator circuit that can go from 1kHz to 50kHz and allows me to adjust the duty cycle from 5-95% without ...
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2answers
38 views

Subtleties of Boost Conver (Step-up Converter)

simulate this circuit – Schematic created using CircuitLab Generally Boost Converter fault happens in my workplace and difficult to find the problem of converter. So I try to understand the ...
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1answer
57 views

Charge pump vs. boost converter for high current LED driver

I am designing a high current LED driver circuit to power a matrix of pulsed IR LEDs. The LEDs will operate at 5A; 4.6V; 0.1ms pulses (~10 pulses at this frequency, wait 300s, repeat.) The device is ...
0
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1answer
48 views

Charging a big battery with small solar panels very very slowly

I have a 6V, .7amp solar panel that typically puts out 2-5V under normal conditions. I would like to charge a 12V 5 amp hr lead acid battery over a few days to weeks. The device that I want to ...
1
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1answer
65 views

Can I safely use a MOSFET switch at the input of a MC33063 boost regulator?

I have a predominantly 3.3V system which occasionally needs to power on a 12V component. Most of the time the component will be off, so in order to preserve power I'd like to avoid idle voltage ...
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0answers
32 views

Charging a LiPo Battery with 1.5V Battery

I have a lithium-polymer battery with a voltage of 11.4V. If I want to charge it with a 1.5V power source (AA battery) and I boost the voltage to 11.7V will it slowly charge the LiPo.
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2answers
151 views

Why is this boost converter application circuit done this way?

The schematic below comes from boost converter AP6714 datasheet - so I assume it's good, but it is very atypical. Most (all that I used) of the impulse power converters have VOUT connected to the ...
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1answer
71 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 ...
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0answers
95 views

Will this Arc Lighter Circuit Work?

I am attempting to build a really cool thing (at least I think). The goal is to build an arc lighter that I can shake to charge (kinetic power). It's a circuit that combines an arc lighter circuit ...
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0answers
22 views

Slope compensation of MAX17498

I want to use MAX17498 in boost mode. I have a problem setting the slope compensation. The slope (as I understand) is the gradient of the inductor's current ramp. The unit is [A/s] or [A/us]. However,...
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1answer
69 views

How to control a boost converter by using pwm from Arduino [closed]

I am creating a simple boost converter that step up voltage in the range 5V-30V. The switch is a MOSFET controlled by PWM output of an Arduino (with additional necessary components.) I want to ...
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1answer
40 views

Feedback resistors not connected to boost regulator

I was using a TPS65131 boost regulator and accidentally forgot to add feedback resistor R3. I noticed that my output negative voltage was -30 volts. I realised that there was no feedback and added the ...
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4answers
152 views

Why does nMOSFET keeps blowing up?

I have designed a Boost PFC circuit, But upon switch on transistor is getting blown up and fuse is burnt. So I removed transistor and just connected source to ground. the circuit worked fine. Then I ...
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1answer
49 views

Boost converter efficiency

I simulated a boost converter on LTspice and have measured the steady-state output power to be 80.49 W and the average power drawn out of the input source during steady-state operation of the ...
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2answers
82 views

Boost converter ringing

I'm working on a Nixie clock based on a STM microcontroller. It consists of two boards: one includes the microcontroller and a boost converter and the other includes the tubes and two HV5530 high ...
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2answers
147 views

Boost converter based on 555 timer not working

I tried to make a simple boost converter circuit for driving an LED using 555 timer IC, but somehow the output voltage is not increased at all. I suppose that the problem is the inductor I used, since ...
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0answers
32 views

LTspice Transient Analysis Simulation error

I am simulating a boost converter, however LTspice is telling me the transient analysis is only 13.8 % done, as seen below. Why is this?
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2answers
49 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 ...
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1answer
58 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.
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1answer
39 views

What is the range of feedback resistors of LM2577 adjustable version?

I am making custom boost converter with LM2577 adjustable version. I have a question about selecting feedback resistors R1 and R2 For R1 and R2 formulas available in the datasheet, but they do not ...
2
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1answer
39 views

Sensible way to power an OLED display from AAA Cells

I'm designing a small battery powered device and I want to use an SSD1327-based OLED display. Unlike the SSD1306, this one doesn't appear to have an integrated boost circuit to power the panel, which ...
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1answer
27 views

Boost Voltage before Regulating or vice versa

I have an input voltage from a 3S battery from 7.4V to 11.1V and I need to regulate / boost it to 5V and 12V. So what is more efficient or what is used in industry Regulate the voltage to 5V with e.g....
12
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3answers
1k views

Why are boost/buck converters never fully integrated/all-in-one?

Moving from small arduino applications to higher-power applications for work, I've had to switch from using simple linear regulators to switching boost/buck converters any time a different voltage to ...
2
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1answer
39 views

Boost converter output power issue

I have LT1302CN8-5#PBF, fixed 5V DC/DC boost converter. I have built the same circuit as shown in the following datasheet document. (https://www.analog.com/media/en/technical-documentation/data-...
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0answers
45 views

MIC4830 output voltage too low

I have built the typical applicaiton circuit from the MIC4830 datasheet. I have used the values for 0.4inch2 EL panel running at 900Hz (REL=0.369MOhm, RSW=321kOhm). The input voltage is 3.3V. My ...
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1answer
64 views

Boost converter output still active when boost IC is turned off

Am using the tps61175 boost converter ic in a project. per the datasheet here i noticed when i pull the EN(enable) PIN LOW and the boost converter ic turns OFF , i still read voltage at the output ...
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0answers
29 views

Modification of boost converter (output voltage as function of external voltage signal)

I would like to modify the boost converter in such a way that it would set its output voltage to the value depending on externally applied voltage from battery or DAC so that for example Vout=2*Vext. ...
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0answers
59 views

Modelling DC/DC-Converter

i want to model a cascaded Buck/Boost-Converter with FAST like mentioned here: https://cbasso.pagesperso-orange.fr/Downloads/PPTs/Chris%20Basso%20APEC%20seminar%202013.pdf. The goal is to implement a ...
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1answer
83 views

State-Space Model of a Buck-Converter in DCM

I have a problem getting the State-Space Representation of an Buck-Converter in DCM. There are 2-Switch Cycles between one Period. If the Switch is closed the Circuit looks like: after applying ...
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2answers
74 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 ...
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3answers
665 views

How much energy is stored in a AA battery when its voltage has dropped to 1.2V?

The general question is how useful it is to use weak batteries with a boost converter - say, boosting 3AA of 1V each to 5V? According to this image it seems that only 5% of the energy is left when ...
2
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2answers
270 views

LED diodes as both diode and load for boost converter

I'm doing an LED project with a Cree CXB3590 LED that I intend to underpower to experiment with efficiency and learn about boost converter design. I've made a 5uH inductor with 14 gauge magnet wire ...
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1answer
151 views

how to increase output current (5V Output, 1.5V input Switch Boost Converter) [closed]

I designed a small boost converter with discrete transistors, and now I need to increase the output current. The output is 30ma/5V but I need more than 70ma. How can I improve the circuit? R5 is load....
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1answer
69 views

Gate driver using switches UC3842 PWM Controller

I have prepared a crude model of boost controller using PSpice simulator of UC3842 IC Gate driver has Ron and Roff as 1 and 100meg respectively (S3 and S5) and Vout will go to external mosfet or a ...
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1answer
76 views

How to implement a transformer into a boost converter instead of an inductor

I am trying to build a boost converter that would output a high DC voltage (several hundreds). My concern is that I should use a transformer, but how should I implement it so that DC voltage input is ...
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1answer
46 views

Boost Converter - Input follows Output

I have a boost converter. \$V_{in}\$ = 7V \$V_{out}\$ = 14V \$I_{load}\$ = 0.35A While testing, I observe that as long as Vin<14V, I observed switching at the inductor switch node. But, as I ...

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