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Questions tagged [boost]

A non-isolated DC/DC converter topology.

3
votes
1answer
44 views

DC-DC Converter - Why is the input voltage called Vg?

In the textbook I'm reading (Fundamentals of Power Electronics 2nd Ed, Erickson and Maksimovic), the input voltage for several different types of converter circuits is labeled Vg. The textbook gives ...
0
votes
2answers
59 views

LM3478 48V boost converter

LM3478 datasheet This circuit was designed with the help of Ti webench, I have checked all the connections, everything checks out. When i connect a 24V 2.2A Dc supply the supply voltage drops to 3V ...
0
votes
0answers
21 views

Adding bulky capacitor vs multiple parallel capacitors on Boost converter's output

For VOUT, I noticed you can add capacitors in parallel to handle voltage ripples. If all capacitors are populated, it will be 10+10+10+100 = 130 uF I wish to compare populating all 4 capacitors (...
0
votes
1answer
46 views

Is this inductor suitable for using in a 1A boost converter?

i have been working on making a boost converter circuit to incorporate into my PCB and have ordered these inductors. I believe i have tracked down the datasheet(difficult with these cheap chinese ...
1
vote
0answers
39 views

Voltage step up module and if I am using it correctly

I am making a "simple" bluetooth speaker and have followed instructions from a Youtube video on how to assemble the components I have bought. However... I am finding that the rechargeable li-po ...
1
vote
0answers
40 views

Boost converter with a non zero reference [on hold]

Will the general formula for boost converter relating output voltage(Vout) to duty cycle(D) still hold for the circuit in the link below? How different will be cuircuit behavior with this setup as ...
2
votes
0answers
62 views

Power Supply Nixie tubes (IN 9)

I am in big trouble with my power supply for Nixie tubes (IN 9 bargraph.) I need 140V -160V (150V prefered) output voltage and 10x 12mA --> ~140mA current. (~ 21W). I tried to design boost ...
0
votes
3answers
126 views

How can I run a 6.5V-100V power meter on 5V?

I have an eBay power meter (V/A/W/Wh) that is specced between DC 6.5V and 100V. It's wired with a 75mV 100A shunt, like this: If I wanted to run the thing at 5 volts what would be the easiest way? ...
-2
votes
1answer
35 views

mt3608 not increasing voltage [closed]

I have built on breadboard the following: Capacitors: 22uF Inductor: 4.7 uH Voltage divider: 9.4kOhm and 4.7 KOhm According to datasheet: https://datasheet.lcsc.com/szlcsc/XI-AN-Aerosemi-Tech-...
0
votes
0answers
50 views

Joule Thief Modelling

I Try to use a joule thief circuit to harvest energy from almost die battery. But the reference that i found on forum or conference paper just explain how joule thief circuit works, not the ...
3
votes
5answers
231 views

Diode type with lowest drop voltage [duplicate]

I make a small solar energy harvester. I'm searching for the type of diode with lowest drop voltage. Any suggestion for the type of diode for me ? Thank you
0
votes
1answer
54 views

DC-DC converter not simulating correctly

I am trying to design a solar charge controller to charge a 12V battery, my solar panel is made of 9 cells that are 5W and 0.5V per-cell. I would like to make a booster circuit to get the voltage up ...
0
votes
0answers
20 views

Issues due to sudden load disconnection/connection

I am working on a circuit (schematic enclosed) which is being powered by a high discharge LiSOCl2 battery. A TPS61232 based 5V booster powers two loads: LOAD1 is directly connected to the 5V bus ...
2
votes
1answer
50 views

Voltage doubler using 555 timer

I found this circuit, a voltage doubler with 555. The duty cycle of the 555 is 50%. Does changing the duty cycle of the 555 timer affect the voltage output like in boost converter? Or does it not ...
20
votes
4answers
6k views

What do the “optional” resistor and capacitor do in this circuit?

I'm designing a circuit that includes a boost converter with a few mysterious "optional" components and I'm trying to decide whether or not to include them. Does anyone know what they do? At first I ...
0
votes
2answers
85 views

Can I add output capacitance to a dc/dc boost converter to help with current spikes?

I have been playing around with achieving better power in my 30-year old RV. I want to create both AC and DC systems to provide power. This has essentially 3 routes from my battery to device: Samlex ...
-2
votes
2answers
57 views

is it possible to boost up the current by keeping the voltage constant?

I have a source that can deliver 20mA and 4.5V (MAXIMUM). I need to boost the current to 1 A without using any further source. Also, the voltage should be maintained constant at 4.5V. is that ...
0
votes
2answers
46 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 ...
1
vote
3answers
96 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
votes
3answers
100 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 ...
0
votes
0answers
24 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 ...
0
votes
0answers
41 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 ...
5
votes
3answers
705 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 ...
0
votes
1answer
88 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 ...
0
votes
1answer
148 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 ...
1
vote
0answers
58 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 ...
0
votes
0answers
19 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
votes
2answers
168 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
votes
4answers
92 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
votes
0answers
166 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
vote
2answers
70 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 ...
0
votes
1answer
36 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 ...
0
votes
0answers
19 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
votes
1answer
100 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 ...
0
votes
1answer
70 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
vote
1answer
90 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
votes
1answer
58 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. ...
-1
votes
1answer
91 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 ...
2
votes
1answer
105 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 ...
0
votes
1answer
101 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 ...
0
votes
1answer
74 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 ...
0
votes
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 ...
0
votes
1answer
153 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
votes
1answer
61 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 ...
1
vote
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 ...
0
votes
0answers
50 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
votes
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 ...
1
vote
2answers
46 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
votes
1answer
64 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 ...
0
votes
2answers
55 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 ...