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Questions tagged [boost]

A non-isolated DC/DC converter topology.

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22 views

Small power supply for nixie tube from 3.7V battery

I would like to build a nixie watch like this one I presume that this kind of watch is powered by a lipo 3.7V battery. Do you have any suggestions on how to build a step-up converter in such a small ...
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2answers
25 views

Is it possible to control DC-DC boost convertor by N-ch MOSFET @ Vin-?

With the widely available DC-DC boost ready built modules based on MT3608 chip can I control it by adding the N-ch MOSFET to the Vin- line like this: The module itself are pretty reference in design ...
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3answers
57 views

LTSpice: Produce Bode Plot for Compensated & Uncompensated Boost Converter

I am designing a product which uses the LTC3122 as a 5V-12V boost converter (datasheet here). This particular device provides the ability to add gain compensation, phase lead, or both. In my case I am ...
3
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1answer
49 views

Boost LED driver output spikes

I designed a boost LED driver based on TPS92691. It drives 56V 5A COB LED from 22-50V input. It works ok. Oscilloscope shows small spikes on input (100mV), but large spikes on output (3V). The spikes ...
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0answers
17 views

Oscillating boost converter output voltage that has a differential amplifier for load, in DRV8662 piezo actuator driver IC

I am building a circuit to drive a piezo stack in a pulsatile fashion and I am using the DRV8662 piezo driver from TI to do so. The circuit diagram is shown here (please disregard the several ...
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0answers
13 views

How to turn off Boost Converter PSOC 5LP completely?

I have this code in PSOC creator (not the best code since I'm doing tests with the PSOC): ...
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0answers
14 views

Disconnecting TP4056 DW01A from load when plugged into USB

I have adapted a load sharing circuit that was posted online that uses a MCP73831 to charge a Lithium battery. In my case I wanted to to use the TP4056DW01A and connect its output to to a boost ...
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3answers
632 views

DC-DC converter from low voltage at high current, to high voltage at low current

I want to build a DC to DC converter with: 25 V input side 400 V output side 4000 watts of continuous rating That means (obviously) 160 amps on the input side and 10 amps on the output. I can’t find ...
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1answer
82 views

Analog implementation of imaginary roots in a transfer function

I have a simple boost converter, and from multiple papers I've read through, a Type 3 Compensator is recommended. I designed one in Matlab/Simulink, and it reacts very quickly. The problem is, when I ...
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1answer
139 views

Single Cell LED boost Converter

I am planning on powering 10 white LEDs (LUXEON 3014) from a single AA rechargeable battery with Vin min=0.9V, Vin max=1.4v VLed=2.8v @ 23mA so total Vout for 10 LEDs Vout=28v, iout=23mA I found this ...
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0answers
51 views

How to disconnect 3.7V battery when USB is connected (boost)

I am developing a circuit which enables me to charge a lithium battery and boost the output voltage up to 5V for a microcontroller. My boost converter is the MT3608, and the charging circuit is the ...
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18 views

Converting boost controller to sync boost controller using H-bridge or 2 gate drivers

I am trying to reduce power losses in a boost led driver. For example TPS92690, uses a MOSFET and a diode for boost mode. Is it a bad idea to use H-bridge instead, or two gate drivers (one in straight ...
2
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2answers
146 views

LT3761 LED driver explodes

I am designing a boost LED driver using LT3761 Using the datasheet examples I designed and ordered PCBs, assembled them, but every time I connect the power one of four things explode: fuse, driver, ...
2
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4answers
73 views

LiPo Voltage Drops

I am experiencing voltage drops with the following setup and I hope someone with mad electronics skills can explain my mistake to me: Raspberry Pi 3 Model B TFP401 Display Driver 7.0 Inch TFT Display ...
2
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0answers
138 views

Large negative current spike in N-Channel MOSFET source when turn-off

I am working on repairing a power supply board of a LCD TV (200W power), more specifically, the PFC section (active power factor correction). See schematic (adapted from here): I've replaced some ...
1
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2answers
66 views

boost converter circuit behaving strangely

I built the following circuit: The boost onverter works fine when applying 0.5 time ON PWM signal (Vout = 2.5V) but when I try to increase the voltage using 0.8* time PWM signal the Vout** stays ...
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1answer
28 views

LT8330 Boost Converter burst mode

I have a LT8330 Boost converter issue. As the output load decrease, this boost converter will use a burst mode, switching between sleep and activity, and thus decreasing the switching frequency. The ...
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0answers
16 views

Boost converter load regulation

I am currently building a boost converter with PID control to control the output based on the discharge. The output will be fed into a DC/AC converter which, ideally, will power different loads. As of ...
2
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1answer
86 views

What could cause my boost converter to output below its nominal voltage?

I'm very new to electronics and I'm building things and experimenting as a learning opportunity. I've put together a boost converter circuit and it works OK, but I've noticed that under larger loads ...
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1answer
62 views

What is the current draw of a capacitor in a VOLTAGE BOOSTER

I'm trying to learn by myself the principles of a voltage boost converter. **BATTERY IS 1.2v@4300mAh I noticed that many sources* suggest not putting a resistor in series with the capacitor (as in ...
1
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1answer
70 views

Boost converter drawing too much current

I am trying to play around with some SMPS boost converters, in order to power my Nixie tubes at around 170V (boosting from 20V to 170V). Yes, I know that there are already existing power supplies that ...
0
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1answer
43 views

B6284 boost converter

Has anyone tangled with the B6284 boost converter IC? It has an enable line that is supposed to shut down the device when connected to ground but I can only get it to drop the output from 12 V to 3 V. ...
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1answer
45 views

Boost converter control in DCM

I am trying to find a reference where a boost converter is controlled in discontinuous conduction mode (DCM) with constant duty cycle and by changing the frequency of operation. More specifically, I ...
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0answers
79 views

Boost converter voltage drop when charging battery

I made a 4s battery pack made of 18650 LiFePO4 cells that I'm planning to use for a mobile computing hobby project. My plan for charging it is to use a salvaged power supply from a computer along ...
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1answer
76 views

Why does duty cycle seem relevant when calculating inductor current in boost converter circuit?

I've been working hard to understand boost converters and the role of inductors in the boost converter circuit. I found a pretty good list of basic calculations from Texas Instruments and I started ...
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1answer
73 views

How do inductor specifications impact their effectiveness in a boost converter circuit?

I've been trying to understand how to select an adequate inductor for a boost converter circuit. I'm a hobbyist so I'm not always sure what to look for, so I haven't been able to find something that ...
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0answers
48 views

How can an inductor/coil turn a bjt on and off?

I've seen a boost converter circuit on YouTube, and the guy uses a second coil, wound on top of the first coil, and in the same direction, it is connected to the base of a BJT. The BJT acts as a ...
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1answer
137 views

Trying to increase amperage of Arduino Uno digital pin (20mA) to control a cabinet lock that is rated at 12v / 2A

I am trying to use my Arduino Uno to send power from one of its digital pins to a cabinet lock, the cabinet lock is "fail-secure," so you send power to it to unlock ...
0
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1answer
55 views

Design questions regarding LM2735 (boost-converter) for DC-DC

I'm doodling with a future circuit. The application (Commodore 64) expects 5VDC (which I will provide with a pass-through) and 9VAC 50Hz. I do not have any working circuit or a schematic, because the ...
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2answers
60 views

Does this circuit adequately represent the thermal considerations for a boost converter?

I'm new to electronics, and I'm trying to use a boost converter to get 5V at 1.2A from a lithium ion battery. I've selected the TPS61232 step up converter for this solution. The datasheet has a ...
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0answers
49 views

What's wrong with my boost converter circuit?

When I first created my circuit, everything worked fine. I didn't use a logic level mosfet at the time but I managed to acquire over 10V at the output (DC motor) and the next morning it stopped ...
2
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1answer
55 views

Buffer capacitors' role in boost power supply design? [duplicate]

In the power supply design, there are always smaller value capacitors placed at the output.What is the main role played by these capacitors in the module? Check the screenshot attached and I am ...
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2answers
45 views

Can I use this inductor in my boost converter circuit?

I used TI Webench to spec out this boost converter circuit: The design calls for an inductor that is marked as end of life. Can I use this inductor instead? My hypothesis is that they are ...
2
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1answer
57 views

Does capacitor package size matter?

I'm selecting parts for this boost converter circuit: The BOM lists these devices: I'm at a hobbyist level with electronics so I can't tell when design decisions are arbitrary and when they're ...
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2answers
54 views

How do I decide which which oscillation frequency and capacitors to use with a boost converter?

I'm working on a few projects where I'll be driving about 8 WS2812B LEDs on a 5V rail with an ATTiny85 (I think the whole circuit is going to draw about .5A; I'm using .75A for my calculations). I'm ...
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1answer
97 views

Easiest (or cheapest) way to get both 5V and 3.3V on one circuit

I'm working on a circuit based on an ATTiny85 and I need accelerometer input. I was looking at using an analog accelerometer (KXTC9-2050 that runs around 240 uA) because I have the extra pin and I'm ...
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2answers
60 views

Calculating the peak current of my boost converter

I am stuck while calculating the peak current in the boost converter through the inductor. Can you please check if I am right? Ipeak=(Max Voltage/ R2) = 18/1000=0.018. So, my peak current through ...
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1answer
50 views

PCB design for MAX1709ESE

I am thinking of using MAX1709ESE step-up converter in my DIY project, and from the datasheet I have found that the chip is manufactured in SOIC16 case without a thermal pad (as opposed to MAX1709EUI+)...
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0answers
14 views

How to find the peak current and Vswce of this IC - NCV3063 [duplicate]

I need to design a boost converter using this IC. From (7.5V to 16.5V) to 23V. Load current max is 255mA. I am having some difficulty in understanding some of the design calculation. How will I ...
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1answer
54 views

Working of boost converter [duplicate]

Can someone explain me the working of this boost converter and the function of individual components. Please. I am unable to understand. Why are the transistors connected to the MOSFET. What purpose ...
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2answers
64 views

Input current for boost converter

I am using this IC in boost converter configuration : boost converter It steps up the voltage from 16.5V to 23V. It drives a load current of 270mA. I need to calculate the input current of the ...
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0answers
29 views

How to design a slope compensation circuit for a boost converter having different output levels at different input ranges?

I am working on a non-isolated boost converter, has 30khz switching frequency and uc3842b is used to implement peak current mode control. Three phase ac after rectification is applied as an input to ...
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1answer
66 views

Parallel LED not achieving expected current from 18650 battery pack and Boost converter

This is kinda a follow up to a previous question I asked here: Parallel 18650 battery pack voltage not stepping-up with Boost converter. Why? I have now added the correct boost converter to my 20 LED ...
1
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1answer
56 views

Question on TWO stage power conditioning

Suppose a induction motor is connected through a inverter. Inverter is fed from a DC-DC boost converter. My question is: to boost converter how load current will look like? Will it look like DC or AC?
4
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1answer
358 views

Why are the input and the battery connected in a transistor amp?

I'm trying to make a simple boost pedal for my guitar using the simplest schematic I found. I'm wondering why the input is connected to the +9v battery in this schematic through a 430kohm resistance. ...
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1answer
26 views

Multiple boost converter voltage pulled down

I need to make a simulation of multiple boost converter design for different load ratios. I have designed 2 boost converter both of them have same duty cycle and same L and C values. Voltage input is ...
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0answers
36 views

DC Voltage Multiplier for Positive and Negative Input

I have a small DC motor being driven by a controller which supplies +6V/-6V to the motor to control its speed and direction (elliptical machine resistance control motor). The issue is that 6Vs is not ...
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2answers
123 views

Choosing inductor and capacitor for boost converter

I am working on a IoT project that involves an arduino and a 4G LTE module. The device will be operated with two Alkaline batteries. Both the arduino and LTE module require 3.3V input so I want to ...
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2answers
112 views

DC 12 V to 2000 V circuit

I want to design a battery operated pest trap (electrocuter). So far I have found out that the electrocuter snaps the insect at about 2000 V when it completes the circuit by landing on 2 nearby wire-...
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0answers
62 views

Hybrid Boost-Flyback Stability Issue

I tried to design a step up SMPS to create ~200-300v from a 24V input with an expected power of ~12W max. Since the project is for a hobby, I chose to attempt a hybrid boost-flyback converter to get ...