Questions tagged [boost]

A non-isolated DC/DC converter topology.

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58 views

TENS unit design

I've been working on a circuit to amplify TENS signals. The initial signal is coming from a phone which is then amplified to about 31 Vrms(~20 peak to peak) and then connected to the human body ...
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1answer
75 views

Boost converter extremely low efficiency

I'm trying to use a boost converter from Pololu that steps up my 1.25 input voltage from a AAA battery to 5V in order to power an Arduino. I have found that my Arduino needs .03A to be powered. I ...
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Boost PFC inductor selection

I want to make a boost PFC. I need a 260 uH inductor which can handle a current (|20sin(2pi*50t)| A + harmonics). As the peak current in one cycle is ~20A, I found an inductor (https://in.element14....
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42 views

Inrush current in the Boost Converter during start

I am making a 400V 1kW boost converter but in the LT-SPICE simulation, it is drawing a huge current of 50-60A at the start for 1ms-3ms, but the current comes down to 12A after that. The inductor ...
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37 views

Having trouble finding a good transistor to turn off boost converter with Arduino

I have a 3.3V volt logic level Arduino that is powered by a single lipo cell. Also connected to that lipo cell is a boost converter that boosts the voltage from 3.7V to 170V to drive Nixie tubes. ...
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43 views

MC34063A: Problem with obtaining step-up performance

I am working with a MC34063A voltage regulator in order to prototype step-up power management solution, with control logic to switch between three different output values. I encountered some issues ...
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2answers
45 views

Step up 3.3V to 5V and draw 500mA without a voltage collapse/break down

I would like to step up 3.3V from my power supply with the help of a dc-dc-boost converter to 5V and then I want to draw 500mA by placing a 10 Ohm resistor between the output-pin of the boost-...
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1answer
46 views

Boost regulator

How can I boost 11.1V from a LiPo battery to 24V input to an LED driver? My LED driver supplies about 20V at 1400 mA.
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34 views

PWM controller IC selection

I am working on a boost converter with analogue PI control. I want to make the PI controller using a separate Op-amp IC and giving its output to the PWM controller to generate proportional PWM signal. ...
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3answers
74 views

Initial Transient Response of Boost Converter

I have been reading about switched-mode DC-DC converters and I'm having some trouble fully understanding the behaviour. Take the following circuit for example (no feedback loop): I understand there ...
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2answers
63 views

How does increasing the capacitance affect the output voltage for a buck converter and boost converter?

From the formula of charge relating capacitance and voltage, $$ Q = CV $$ Capacitance is inversely proportional to voltage. This is how I got the idea that possibly when increasing the capacitance, ...
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1answer
47 views

Is there a mathematical representation that represents the output voltage of a buck or boost converter in discontinuous mode?

Recently I have learned that in buck or boost converters, the output voltage depends only on the duty cycle and input voltage in continuous conduction mode or when current is continuous. However, in ...
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57 views

How does a boost converter allow for a gain in output voltage by just switching the positions of the inductor and switch?

I get that in a buck converter, a low pass LC circuit was attached and this effectively filters out high frequencies. If the bandwidth is configured so that it is lower than the switching frequency, a ...
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48 views

Battery constant current discharge using boost converter

I am trying to run a constant current discharge test on a 12V battery using a boost converter by controlling the MOSFET’s gate input signal with hysteretic control. I’ve attached the circuit diagram ...
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4answers
59 views

Producing a boost converter, difference with theoretical analysis

I'm trying to reproduce a boost converter with these specifications: Po=200W Vin=40V Vout=120V L=100uH switching frequency 100kHz I tried it but the load power does not reach 200W and Iout isn't 1....
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1answer
56 views

I have a boost circuit. When the gate is low a short circuit appears

simulate this circuit – Schematic created using CircuitLab I am using a boost circuit as a constant current load, using an IRFZ44 N-channel MOSFET and an IR2104 low side driver taking the signal ...
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1answer
47 views

Best practices for parallel DC/DC Boost Converters

I'm working on a portable project that takes 4 (appropriately-rated) Li-Ion cells in a 4S configuration (14.46-16.8V) and boosts it to 27V for a 10-20 Ohm resistive load (soldering iron). The ...
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34 views

Voltage setup for lighting rig (mobile)

I'm trying to build a mobile rig with a series of powerful lights (LEDs, Infrared, UV). My question is concerning the nominal voltage requirements of my project. Some of the lights I want to use, due ...
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37 views

Not able to figure out how to solve this as \$I(s)\$ is used in the feedback

I am not able to figure out the approach to this problem because \$I(s)\$ is connected to feedback instead of \$V(s)\$
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1answer
41 views

How to take a nixie power supply and make a low power frequency modulated signal

The project I am working on requires a low input voltage stepped up to a high voltage at a certain frequency and PWM with low power. I found a nixie power supply circuit that can supply 170V at 20mA ...
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1answer
44 views

Issue with HV boost converter using TL5001

I have a boost converter circuit that (should) convert from 12V input to 500V output with a TL5001 PWM controller. The problem I'm having is that the TL5001 PWM controller doesn't seem to be doing ...
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2answers
86 views

Can I modify a PC AT switching power supply to put out higher amps?

What I have is a 250W PC AT power supply. It has 12V 8A, 5V 30A. I don't need the 5V, so I was thinking maybe I can use a booster to kick the 5V up to 12V and add some amps to the 12V side. So if my ...
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5MM Blinking (Candle) LED replacing a White 5mm LED in a Solar Garden Light

I'm looking to replace the standard white LEDs I have in my solar powered garden lights with the same size yellow blinking (candle) LEDs. My garden lights use the ANA618. I know the blinking LEDS ...
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1answer
72 views

Alternate Inductor that can be used for MT3608 boost converter circuit

I am planning to use MT3608 schematic for my project to boost the voltage from 3.7V to 5V. I am planning on making a customized PCB with all the requirements that are needed for the project. In the ...
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2answers
70 views

High current through Mosfet in boost converter?

I want to make a simple boost converter to step 5V up to anywhere from 30V to 65V I want to be able to vary my duty cycle to be anywhere between there. Did I chose a correct mosfet? I would like a ...
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29 views

XL6009E1 boost converter weird +40V voltage spike when feeding in 3V

I'm using a DSN6009 boost converter which uses the XL6009E1 chip, with the following specs: 3-30V input voltage, with an optimal range of 5-30V input voltage 5-35V output voltage, with a maximum ...
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95 views

Gate Driver keeps burning

I'm designing an MPPT charger with a Synchronous Boost Converter using the LTC4444 gate driver. For prototyping I made a 1 layer pcb where I soldered all the components and added a few cables. The ...
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1answer
38 views

DC-DC Boost Converter \w Inrush Current Protection - Voltage

I wanted to dive in Power Electronics and create a 24V DC-DC Boost Converter that would run from 2.5 to 5 V power supply. 80% efficiency was assumed, and 30 kHz frequency chosen for the PWM. Initial ...
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1answer
60 views

Are my calculations for this LED boost driver circuit correct? (TPS61169)

I have a display with the backlight LEDs arranged 6S4P (so 4 parallel strings of 6 LEDs joined internally, so must be driven as single string) and have been trying to find a suitable driver for it - I ...
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1answer
80 views

Generate +/- voltage outputs using two boost converters?

I am working on a project to power some audio equipment that requires +/- 15V DC. Output current load is about 250mA, maximum. I am wondering if there’s any reason I couldn’t create this using two ...
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0answers
31 views

Does boosting circuit requires a switch for not draining the current? Is there any anoter alternative for this case?

Iam using 134n3p module to boost the voltage from 3.7v to 5v and using that 5v to light up SMD LEDs. I removed the 5V USB hub and connected the 5V and GND pins to my LED circuit. When I am connecting ...
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1answer
95 views

3.7 to 5 V boost converter does not work as desired

I was trying to boost 3.7 V to 5 V @ max 1A. Used LTC3426 DC-DC converter for it. LTC3426 datasheet here. I made a simulation before printing PCB and I get the voltage I needed. However, now I have ...
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61 views

electromagnetic energy harvesting LTspice simulation problem

In my project I need to use electromagnetic energy harvesting that provides below 1V. Rectification and voltage level boosting are required to meet the power supply requirements of typical electronic ...
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0answers
56 views

Using LMR62421XMF to boost Li-ion voltage from 3.3V to 7.5V@0.5A but voltage droops

While designing using the LMR62421 for boosting from 3.6V to 7.5V, I followed the typical circuit from the datasheet (below) and simulated it on WORK bench for 0.5A. When used practically for a load ...
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39 views

why the 555 timer output is not the same as my calculation

Hi may i ask why is my calculation for the 555 timer of U2 is not the same as the simulator. U1 output signal 22064.24Hz, 92.81% duty cycle. t=1.1* R_1*C_1 t=1.1* 10k* 2.2n t=1.1* 10k*2.2n t=0.0242ms ...
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1answer
59 views

Powering 6E1P vacuum tube VU meter

This will probably be a rather lengthy and detailed question(s). I wanted to break things up, but since everything is kind of related, I've decided to keep it as one post. I do apologize if that's not ...
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69 views

Getting negative pulse on Q2 mosfet at gate to source pin

BOOST CIRCUIT: Working on DC-DC boost converter circuit as given bellow. Getting negative pulse of -25.6V on Q2 mosfet at gate to source pin. This is much higher then then its maximum operating ...
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51 views

Buck Converter Supplying Boost Converter - Potential Problems?

This post asked a similar question to mine, but the problems that I have noticed are distinctly different. I have a PCB that uses a buck converter to supply 12V from a 24V source, and I am boosting ...
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0answers
50 views

High voltage booster with continuous output?

I need a module that can take a DC voltage of 2V - 12V continuously as its input and produce atleast 2KV DC continuously as its output. I've come across high voltage generator boost modules but they ...
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3answers
115 views

DC to DC boost converter low frequency

I am looking for a DC to DC boost converter constant current with very low switching frequency to pass EMC. Vin- 12V Vout- 36V, 100mA. Any suitable device for my above application?
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15 views

What is RD in ST Edesign suite

I trying simulate my dc to dc boost converter in ST microelectronics Edesign suite. there are some input parameters need to be enter. Vin- 12V Vout- 36V, 100mA What is Rd I am not getting. any help..? ...
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35 views

frequency of MCP3008

I built BOOST CONVERTER, I sample the output voltage with A/D and control it using RASPBERRY Pi3, I set the switching frequency of the BOOST CONVERTER 70KHz, and the frequency of the MCP3008 1.35MHz, ...
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27 views

Boost converter vout not boosting

I am working on dc to dc boost converter using IC LED5000. schematic design and components as per E-Design suite from ST microelectronics. specifications are Vin- 12V DC Vout- 36V, 100mA FSW- 800KHz ...
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44 views

how to Calculate Equilibrium point of equations

I was reading an article about finite state machine and boost converter. I don't know how to calculate the equilibrium point $$v^* $$ for convenience the equation of v is $$ v = \frac{v_in}{1-d_n} $$ ...
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1answer
93 views

Boost Converter Enhancement

I made myself a boost converter, Since most of it is my own design (like inductor) I am surprised that it works, despite having very little knowledge of electronics, that is why I am skeptical and ...
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1answer
90 views

3.7- 5v boost converter issue

I am trying to do boost converter with using mc34063 ic for my project. When I simulate the circuit on LTSpice with 3.7V input. I can get 5V output without any problem. However, when I change the ...
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1answer
50 views

Need support LM2733 boost converter

i working on 3W DC to DC boos converter using LM2733YMF IC Specs are- Vin- 12V Vout- 36V, 100mA FSW- 600KHz Schematic and components selected as per WEBENCH design tool. find attached file board work ...
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0answers
59 views

XL6009 Boost Converter as 8V Camera (DSLR) External Power Supply - Camera not Turning on

I need my camera Canon EOS 7D Mark II powered in terrain for a long period of time (10 + hours, mostly idling). I bought a dummy battery with 5V to 8V boost converter (camera uses 7.2 Li-ion battery), ...
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1answer
54 views

Arduino based boost converter

Trying to build arduino based boost converter, The problem is, I have many coils but have no idea what their uh value is, some small ones have numbers on them, If I use what appears to be a 100uh (by ...
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0answers
63 views

Input current to a non-isolated boost converter

I am measuring the current at the input to a non isolated boost converter. See Fig 1 I am measuring different currents on the positive input and the negative input terminals to the boost converter. I ...

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