Questions tagged [boost]

A non-isolated DC/DC converter topology.

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2answers
35 views

What voltage should DIY laptop external battery have?

I want to make an external powerbank for my laptop, since its battery cannot be removed (MSI GP62M 7RDX). What voltage should my battery have? 18650 elements have nominal voltage of 3.7. My laptop ...
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1answer
26 views

How to use chip XL6007E1 to build a boost ciruit?

My ciruit: Input: 3.7V But no matter how I adjust the potentiometer, the voltage did not rise. How can I solve it?
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40 views

12v load doesn't turn on with boost converter

I'm trying to build a power source for my router during load shedding. But the router doesn't turns on while connected to any sort of boost converter. I have tried 5 more different routers from ...
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1answer
24 views

Setting minimum output voltage of boost converter with potentiometer and resistor

I am designing an LED light project using this Cree XLamp LED, (Forward voltage is 36V, forward current is 2400mA) and I am looking for a way to limit the output voltage of a boost converter by adding ...
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1answer
35 views

How does this specific boost converter work?

So I found this Geiger counter at https://mightyohm.com/blog/products/geiger-counter/. You can also find the detailed electronic schematics there. I tried to figure out how this apparatus works, but I'...
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1answer
79 views

Guitar pedal works by itself but not in a signal chain

I just built a clone of an LPB-1 pedal, as my first ever guitar pedal project. It works great between my guitar and amp with no other pedals in the chain. When it is placed in a chain with pedals ...
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1answer
36 views

How to boost my Lipo battery automatically when connected to a load?

Ibam using a Lipo battery to boost the voltage from 3.7V to 10V using a MT3608 module. Since the MT3608 module always boosts the voltage no matter if I connect the load at 10V. Is there a way where ...
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2answers
44 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 ...
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1answer
931 views

What does ring and cylinder symbol mean? [duplicate]

I'm seeing an odd symbol in a schematic provided in a datasheet for the power management chip ADP5091: a ring that goes through a cylinder. The cylinder is connected to the inductor (SW pin) and the ...
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3answers
72 views

3.7 V to 12 V boost converter - effect on cell

If I boost a 3.7 V 18650 battery to 12 V with a boost converter, would it affect the durability of the battery? For example, if I have a 2100 mAh Li-ion boosted to 12 V, would it affect the 2100 mAh ...
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1answer
76 views

Li-Ion UPS for a 12V 1.5A Router

I know this question has been asked quite a few times on this site. The closest one i could find is: make-9v-ups-for-router-with-tp4056-and-mt3608. While there are UPS systems designed for routers, in ...
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0answers
75 views

DC-DC boost converter resets mcu

Edit: A p-channel mosfet to keep DC boost circuit separated from main circuit until its charged worked like a charm. I'm trying to build a DC-DC boost converter, controlled by a 200kHz PWM signal ...
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2answers
65 views

What are the draw back of having multiple smps stages in series?

Application output - 100V 10mA Input - single cell lipo 3.7V 5000mAh overall efficiency > 85% required. I tested Texas instruments power bench. Texas instruments power bench cannot generate ...
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1answer
43 views

LM2733 boost circuit - inductor current requirements

I do not have much experience with boost circuits, and am having a hard time picking a suitable inductor required for my LM2733 boost circuit. I have done a lot of research on the actual boost circuit,...
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1answer
111 views

switch the (pnp) BJT transistor

this is my buck boost converter in the simulation i get the desire voltage -12V but in real circuit i just getting -4.88V , and my transistor heats up i think it is even burned , I dont know how I ...
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0answers
46 views

Boosting 3.0 - 4.6 Volts to 5V

I found this circuit that will auto switch between power between USB (5V) or a LiPo Battery (3.0V - 4.2V range). The schottky diode, D4, can have a voltage drop of about 0.4V which is too high for me....
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DC-DC Boost Converter Only Works with a Second Supply

I'm trying to build a 5V to 8V boost converter to use at another mosfet's gate voltage. I'm using a PIC mcu to create a 50kHz square wave signal to switch the BUZ101L. For test purposes i also added a ...
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2answers
75 views

Drop input voltage for a boost converter

I have a 21V DC solar panel power source, that feeds a DC-DC boost converter. I set the output voltage of the boost converter to 19.5V to charge my laptop, but since the input voltage is higher than ...
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43 views

Low voltage (self-oscillating) boost for solar powered pond pump

Long story shortened: I am currently designing a small filter for my pond using a small pump (6V-12V, upto 540mA) with UV-C LEDs parallel to it. Currently, it is battery powered (9V, 6x1.5V AA cells) ...
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34 views

How does a boost converter power the oscillating circuit and load at the same time?

so I've put together a boost converter circuit of my own and I have a problem, I want my boost converter to output reasonably high current but whenever I connect a high current load - the astable ...
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1answer
51 views

Boost Converter why is the calculation result not the same as simulation

guys just asking why is my simulation result not the same as my calculation I am not sure why. My design has the specification of Vin (power supply) = 1.5V , Vout = 5Volt with a Pout(power output of) =...
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0answers
41 views

Design of a boost converter with large variation in output current and low output ripple

I'm working on the design of a 24V to 30V boost converter that needs to have an output ripple of less than 100 mV with an output current between 0 and 2 A. The output is used to power a controller for ...
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1answer
98 views

Design a 100 watt inverter, but why when the circuit is connected to the power supply sparks out?

I'm making an inverter with 100 Watt power, 220 volt output voltage. The input voltage source of the inverter is from solar panels with a maximum voltage of 18 volts and a maximum current of 5.56 ...
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1answer
70 views

Current Amplification

I have a DAC that outputs between 0-5V range but lacks the current output, that I do need to get more out of it, it provides approximately 10mA at tops. I need to boost the current by a transistor but ...
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2answers
36 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-...
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1answer
30 views

Inverting boost converter by using MC33063A/MC34063A: Where does the IC get ground connection?

I want to design an inverting boost circuit by using MC33063A. I want to generate -5.75V from a +5V supply. My question is, how does the IC connect itself to the ground? The 4th pin is the ground pin ...
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0answers
112 views

Problems on switching MOSFET for boost converter

**EDITED I am supposed to build a boost converter that steps-up a 1.5V input to 5V (also I only have 1.5V as my power source). I have designed the circuit out but the only problem I face right now is ...
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2answers
50 views

Why do I get such high values when calculating the power dissipation of MOSFET in boost-converter circuit?

I'm a hobbist interested in electronics so I don't have any "professional" training on that. Currently I'm trying to design a boost converter and now I'm stuck at some calculations. I wonder ...
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0answers
47 views

Synchronous boost light load operation and general SMPS terms

What are the differences between the skip cycle, pulse skipping, diode emulation, and forced PWM at general DC DC converter light load operations? How do they work and when do I want to use them? Page ...
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32 views

Open a MOSFET with a step-up converter

Hello smart people of the internet. Please help me to solve a puzzle. I'm pretty sure there is something simple I'm missing. So here is what I have: I have a 2.2v battery that I want to discharge via ...
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34 views

Why does my input current inverter is high?

I have a problem with input current in my inverter is high. My inverter will use for solar panel and using boost converter to convert dc voltage 12-18 Volt to 24 volt. I'm using P channel mosfet ...
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2answers
111 views

How to fully discharge supercapacitor?

My biggest problem is when I discharge a supercapacitor, let's say 100F 2.7V, I use a boost converter, but all boost converters have a minimum input voltage of about 0.9V. But the capacitor still has ...
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1answer
42 views

Laptop adapter + DC buck/boost converter or buck convereter only?

I have an old laptop adapter, with 19 V - 4.74 A DC output ratings. Suppose I need to draw 3 A @ 11.1 V for one of my circuits. I have been doing some research about dc-dc converters and have some ...
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1answer
109 views

I can't get the desired output voltage

This is a simulation of a buck boost converter. I want to get -12V as the output voltage , but I get -1.148V. I checked the PWM and the duty cycle and it is right. I think that my problem in ...
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1answer
90 views

Is boost converter enough to provide pulse currents without drawing too much current from a coin cell

I am making a RF circuit which could operate using a 3V coin cell battery like CR2032 or CR2450. In sleep mode it consumes around 10-20uA but during Tx/Rx which lasts for 10ms it consumes ~300mA-ms. ...
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1answer
44 views

Buck-Boost Transformer with Three Phase Wiring

I live in a residence with 120v / 208v electrical service. (Measured as leg1: 124v, leg2: 125v, 215v across legs) I am nearly certain that the service is the result of two legs of three phase power. ...
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30 views

Can I cascade boost converters?

Can I cascade the boost converters, each converter input connected to input solar panel (48 Voc and 9A Isc), and the converter output is 110 V? What should I do to connect them in cascade?
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2answers
62 views

Boost Converter Stuck at Around 80 Volts

I'm building a boost converter that utilizes a 555 timer switching at 60 kHz at a 96% duty cycle which drives an IRF3205 MOSFET to power a hand wound inductor (calculated to have ~330 uH) with a 6A10 ...
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0answers
39 views

output voltage of boost converter

I built a boost converter and I can't see on the oscilloscope the 12V in the output and the real frequency that I defined (70kHz.) What should I do? This is my circuit, and below that is what I see ...
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2answers
35 views

TI TPS6116 Output Voltage

I am designing an LED backlight driver as a sub-circuit for a DPI interface. The backlight in question requires 12.8V. I am trying to use the TPS61161 and have read through all of the documentation ...
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What's the best option to power up a ComputeModule and a backlight LED with a battery?

this is my first foray in a complete PCB for the Raspberry Pi Compute Module (and my 4th PCB ever) and the first one with power management components. My background is Computer Science. I did study ...
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1answer
167 views

Calculate peak input current of switch mode power supply

I have the following problem. MY ATTEMPT The switch-mode power supply looks like it's a boost converter. I found that the DC-transfer functions for the boost converter to be: \$\frac{V_C}{V_{...
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41 views

DIY 3 V -16 V, 300 watt boost converter for ultracapacitors

I am trying to build a power supply for a portable Tesla coil project using 6 × 3000 farad supercapacitors in series (16.2 V @ 500 F). I am trying to maximize the usability of the supercapacitor ...
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132 views

DC DC boost converter with TL494

I am designing a boost converter circuit 12V up to 60V using TL494. (picture below is the circuit I have designed). My problem is that the circuit cannot operate stably at the output voltage of ...
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38 views

Reverse-design simple µC boost converter: How to calculate ideal frequency & pulse width

I aim to create ~400V @ <1mA from a 12V/2A supply to supply a Geiger-Mueller tube using a simple µC driven boost converter for a Geiger counter. The converter consists of just an inductor and a ...
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2answers
30 views

Problem with LTC3872 Voltage Converter. Simulated results not matching with information provided in the datasheet

I'm trying to make a boost converter that takes an input of 3.7V and outputs 5V. I found a chip that I think will work well, the LTC3872 by Linear Technology. In the datasheet they give an example ...
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2answers
108 views

AC-DC High voltage converter

I don't have much experience with power electronics but I'm trying to design a power supply with AC 220Vrms (311peak) to DC 1500V converter to charge a capacitor in 50 miliseconds (and keep charging ...
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2answers
24 views

Boost converter for powering SD card

I want to use a switching boost converter that has 3.3V output in order to power an SD card. Also, the input voltage is a CR2477 battery, with voltage ranging from 2 to 3 volts. I have seen that an SD ...
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0answers
63 views

Home project about detecting harmful gases

I am designing a PCB for detecting harmful gases (below is the schematic in Eagle). I have used MQ7 and MQ135 sensors, and the ESP32 WROOM32D MCU. For the power supply, I have used HLK-PM03 since I'...
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2answers
160 views

step up converter

I built a circuit of boost converter and my input voltages, 6-9V. I want to get output at the converter 9-12V, my problem is that I get over 40V and I do not know why, in the code do I have to set ...

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