A non-isolated DC/DC converter topology.
0
votes
2answers
53 views
Gate driver and instability problem
This is a gate driver circuit for a boost converter.
However, there is one part that I don't understand. Could you explain it or give me some links so I can read up about that?
Here is the part that ...
0
votes
1answer
54 views
1V to 5V dc-dc step-up circuit @ Iout = 1A
I am trying to convert unregulated 1V input to 5V, 1A output within a project I am working on. I have tried working with MAX757 but could not get it to work. It takes a couple of weeks for maxim ICs ...
0
votes
0answers
24 views
How to generate PWM signal with low voltages using Schmitt trigger or linear circuits
I want to design PWL signal to drive this Mosfet so i need to generate PWL signal using Schmitt trigger circuit or using any oscillator. I have an idea about Schmitt trigger but as i implement in LT ...
0
votes
1answer
28 views
Why dc motor is buzzing when using it with XL6009 converter?
I have the following scheme RPI, L298n with 6v DC motor. I'm trying to add a XL6009 boost converter but set to boost 5v into 6v but sometimes the motor is rotating and sometimes is buzzing. Does this ...
0
votes
1answer
54 views
What drawbacks to bucking, then boosting the same current?
Are there any real negative drawbacks - outside of the double drop of efficiency - of DC-DC boosting a power line that was already DC-DC bucked?
I'm building a modular system, serially linked through ...
0
votes
2answers
81 views
Experiments to convert analog 10ns pulse to digital 10ns pulse
My objective :
converting laser pulses from photo diode ranging from 10nA - 100mA (60dB dynamic range of incident power) to digital format, for measuring pulse width exactly
pulse width 10ns and ...
1
vote
1answer
41 views
Boost Regulator LDO bucking voltage
I'm trying to use the LT3048-5 to get a steady 5V output from a battery that outputs 4.2->3.0V
I connected together the following setup from the datasheet:
But what I'm getting when I input 4.2V ...
0
votes
2answers
161 views
Is my 600W boost broken or malfunctioning?
I'm asking this mainly as a sanity check and to distinguish between whether I've just done something wrong or need to buy a new one.
I have a "600W" boost converter based on the UC3842A SMPS w/ CC ...
0
votes
1answer
25 views
Where can I get knowledge on transient mode boost converter for SMPS?
I am working on boost converters for switching mode power supply . How can I get knowledge on transient mode boost converter ?
As I know there are different topologies named CCM , DCM and TM which ...
2
votes
2answers
108 views
How do I simulate a dc-dc boost converter in LTspice?
For a electric circuits lab I had to implement a dc-dc boost converter circuit and take certain measurements while I varied the duty cycle of the pulse applied to the MOSFET so that I could observe ...
0
votes
1answer
42 views
Power supply - Boost voltage over distances
I'm looking for a good power supply design to boost the DC voltage and convert it to AC so it can be transported over a long distances with low loss. I have drawed a example picture:
The only thing ...
1
vote
0answers
62 views
Buck Boost Driver to switch 2 LED chains
simulate this circuit – Schematic created using CircuitLab
I'm working on a project to turn 2 LED strings (each containing 6 HB LEDs).
Here is my question.
The Buck Boost driver I'm ...
-1
votes
2answers
45 views
5V stepboost low voltage [closed]
i have two 5V stepboost modules from Ebay, however they are quite poor. Blue can provide atleast 1.45W, but the green one, is the worst - can provide only 0.09W, and i noticed, after two minutes ...
0
votes
1answer
39 views
Does current flow through the potentiometers of buck and boost converters?
I'm working on a project where I'm replacing the trimpots on a buck converter and a boost converter with proper potentiometers. The new potentiometers will be wired to the converters instead of ...
0
votes
1answer
88 views
why use 2 diodes when shifting from 3.3 to 5v? [closed]
for the question "how do I go from 3.3 to 5v" people point to the microchip cheat sheet.
The Diode option has one between the data line and 5V so it pulls it almost to zero, the other one seems to ...
0
votes
0answers
41 views
How to use lithium batteries to power single high-power LED
I recovered some LiIon cells from an old laptop battery. They were 3 pairs in series and each cell is rated at 3.6-3.7V. One pair is dead, I have two pairs in good condition.
I want to reuse them to ...
0
votes
1answer
29 views
TPS61196 LED Driver chip for high Voltage Backlight applications: What to do for proper backlight driving?
I need to design a Backlight Driver which has to have high brightness.
These are the equipments I have in the design:
My Backlight String combined of 2 parallel of 28 serial LEDs(2 * 28 = 56 LEDs)
...
-3
votes
1answer
58 views
Powering peltier tile using 3.7V lipo battery?
Is it possible power the peltier tile to a reasonable temperature using only a 2500mAh 3.7V lipo battery and DC Boost Converter to boost the output to 12V?
The peltier tile I'm using is bought here: ...
0
votes
3answers
89 views
Outputting 2 different voltage with one power supply
I'm wondering if it is possible to output 2 different voltage with one power supply (a 3.7V Li-Poly Battery) by placing 2 DC Boost converter in parallel?
The schematic is as shown:
1
vote
2answers
101 views
why Boost converter output voltage decreases at high power?
I am implementing non-isolated Boost Converter, capable of handling a power of 1Kw and output voltage is to be maintained at 400V at an input voltage of 120V . At smaller load current (around 2.5 Amp ...
0
votes
0answers
55 views
MIC2251 Boost Converter Voltage Dropping
I have put together a boost converter using the MIC2251-2YD5, SOT-23 package.
http://docs-europe.electrocomponents.com/webdocs/1065/0900766b81065118.pdf
I am using to to get 5V from a single cell ...
1
vote
2answers
347 views
What is the correct replacement for this mosfet?
I'm trying to repair a broken DC-ATX power supply that I have.
After a bit of searching for faults I believe I have tracked the problem down to one of the MOSFETs.
I would like to try replace this ...
0
votes
0answers
30 views
LM5106 gate driver for synchronous dc-dc boost converter: protection of HS pin
I am using a Texas Instr. LM5106 as the gate driver for a synchronous boost converter.
I read in the datasheet (par 10.1.1 - point 1) that Transient Voltages Below Ground of the HS pin may hinder ...
0
votes
2answers
62 views
UC3843 Boost Converter Circuit
The datasheet of the chip UC3843 recommends to add an external resistor of about 10-20 ohm in series with the MOSFET. Can anyone explain how to calculate the power dissipation in the series resistor? ...
1
vote
3answers
103 views
555 high amperage charge pump inductorless voltage doubler
There's a few resources out there for indcutorless boost circuits, or charge-pump voltage doublers and triplers.
http://www.electroschematics.com/648/555-voltage-doubler/
But this circuit is only ...
-1
votes
1answer
97 views
Issue in High side Mosfet in bidirectional Buck Boost Converter?
i am making bidirectional buck-boost converter. The schismatic of bidirectional buck boost converter is attached here.
Buck Mode = when PWM is applied to Q1 , it work as buck converter. when q1 is ...
0
votes
0answers
35 views
Anti-ringing boost converter
From the site, page 7, there is a functional block diagram of TPS61020 boost converter. As you can see there is an anti-ringing there.
Does anyone here have an idea how this block is implemented?
...
0
votes
1answer
29 views
Boost converter with pulse skipping modulation
With boost converter using pulse skipping modulation, how is it possible for it to keep output voltage constant when load current increases?
When load current increases, the output voltage decreases ...
0
votes
1answer
54 views
Advice on Buck-Boost Stage
In one of my circuit, the incoming variable voltage(8.5-24V DC) from the source will be first stepped up to 17V using a boost converter. The same output shall then be stepped down to different ...
1
vote
2answers
74 views
Earth resistivity meter design
I would like to design an earth resistivity meter for use in archaeological surveying. This is essentially a current source placed in the ground and a ohmmeter to measure the resistance between the ...
0
votes
2answers
45 views
Understand boost converter's voltage conversion ratio
Below is a boost converter with its inductor current waveform operating in DCM.
The voltage conversion ratio of the converter is as follows:
M(D1,D2) = V/Vg= 1 + D1/D2
where V and Vg are output and ...
2
votes
1answer
56 views
Analyse boost converter using the three rules
I am trying to analyse the boost converter operating in DCM mode below.
By using three rules as here:
Inductor volt-second balance
Capacitor charge balance
Small ripple approximation
This what I ...
0
votes
3answers
87 views
Wiring LEDs in series and parallel
I am looking to build a light stick.
I am quite new to electronics and have just been experimenting so far. My light needs to be portable so I am using a 3.7v LiPo battery (I am into RC so have some ...
0
votes
1answer
48 views
Fried TPS61030PWP
I have constructed the circuit below which I put together based on the datasheet. I am testing this circuit using a bench power supply. I have tried 1.8V and 2.7V supplies. With no load or a resistive ...
6
votes
2answers
159 views
Maximum power out of thermoelectric generator?
The conventional method to extract maximum amount of energy from ThermoElectric Generator (TEG) is to load it with a resistance equal to the TEG's internal resistance as the maximum power transfer ...
4
votes
2answers
195 views
How does this circuit work
I am looking at this circuit which converts 5V to 13V, and am wondering how it is designed.
I have seen inductors being used in buck convertors, where a squre wave was used to convert and make it a ...
0
votes
1answer
94 views
Voltage vs Battery Life trade off
I have a PCB board which is supposed to be powered of 12V supply.However, now I would like to run this of a battery.
Most LiPo batteries are 3.7V , and 12V batteries are big and hard to get. What is ...
0
votes
2answers
36 views
Can boost converter operate under these conditions?
I am wondering whether the boost converter is possible to operate with these conditions below or not:
All components or sources are ideal
Initial voltage across output capacitor is zero voltage.
...
1
vote
2answers
67 views
Is feedforward used in boost converter operating in DCM mode?
Is feedforward used in boost converter operating in DCM mode?
I saw some examples where feedforward is used to control boost converter in CCM but not DCM mode. So I am wondering if it can be used in ...
9
votes
1answer
161 views
Boosting 5V/2A to +70/-70V for op-amp rails?
I am trying to drive an ultrasonic "tweeter" for a wearable research project. Compared to a normal speaker, the tweeter has a very high impedance, upwards of 4kohm. As a result, it requires a very ...
1
vote
2answers
91 views
Why this inverter is used in the PWM circuit?
The circuit below is a programmable duty cycle modulator for boost converter in a paper. As from the picture, there are two signals CLK/64 and CLK/64SHIFTED. Could you explain why the signal CLK/64 is ...
5
votes
4answers
2k views
Why can't you use a coil to transform 5 volts DC to 12 volts DC?
Why can't you just use a coil transformer, like when you want to get 240 volts out of a car battery instead of a boost converter? I found a thread that sparked my interest - How to transform 5V into ...
0
votes
2answers
101 views
How to change the width of a given square wave with duty cycle 50% without using microcontroller or ramp solutions?
Is there a simple way to change the width of a given square wave with duty cycle 50% without using microcontroller or ramp solutions?
Actually, this square wave is switching frequency for my boost ...
0
votes
2answers
55 views
Question on LM2577
I have a hard time fully understanding the datasheet of LM2577. I bought this product that has a LM2577 in it and the specifications indicated by the seller that it can have a maximum output current ...
-1
votes
1answer
33 views
How to get 200mA/6v supply for MG-811 sensor from 2A/5vdc psu in small form factor? [closed]
I have a wall mounted raspberry pi, which has a 5vdc cable running into it, and that supply is rated for 2A. I'd like to add a CO2 sensor to the mix, and I've got a MG-811 to hand
That component ...
0
votes
1answer
47 views
Boost converter with input-referenced output
I'm building my first switching DC/DC converter as part of a larger circuit. I need to convert a input voltage range to an overlapping output voltage (e.g. 3-5V in, 4V out). This would typically be ...
0
votes
1answer
100 views
Flyback converter for a step-up application (4VDC to 48VDC)
From what I have seen, flybacks are used for step down applications, are step-up applications possible? More specifically, is converting from 4VDC to 48VDC possible using a 1:8 transformer?
I'm ...
1
vote
3answers
129 views
Transformerless BUCK SMPS for 1kV->12V
I have a challenge to push 500 Watts (15V) at 100 meters of telco telephone cable (0.088mm2, 28 AWG, 200Ohm/km, 500MOhm insulation).
The only way to achieve this is by boosting the voltage up to ...
3
votes
3answers
113 views
Buck-Boost converter question
I have a school task for creating a Buck Boost converter that takes 12V and outputs -48V. I have done some digging and couldn't find my answer since I could only find converters that give a number ...
0
votes
1answer
55 views
What's going to be more efficient, buck from series or boost from parallel?
I've found many similar questions, and hate to ask something so similar, but my goal is to get usb power (4A continuous) from 4 18650 Li-Ion cells. I'm debating putting them in parallel and using a ...
