Questions tagged [buck-boost]
A non-isolated DC-DC converter topology
96
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46 views
Parallel LTC3127 based software controlled supercapacitor charger
I am trying to charge 3 supercapacitors rated for 2.7VDC-300F connected in parallel, giving a total of 900F@2.7V. The IC I am trying to use is the LTC3127 from Analog Devices(Linear Technologies). I ...
0
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1answer
37 views
ISL85403 buck-boost converter
I have a requirement for a 24V +- 15% rail to power a laser sensor off of a 24V lead acid battery pack. I implemented the reference design provided by renesas for a 12V buck-boost converter(...
1
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1answer
48 views
How does an inductor limit a voltage booster?
I’m making a voltage booster to boost li-ion voltages 3v-4.2v to 5v with high current and a small footprint. I’m using TI’s Webench tool to help. It suggest a 1uH inductor for a 12A load, but if I ...
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2answers
62 views
Dividing output voltage from a buck boost converter
I am a student in high school and have been working with buck boost converters. I currently have a buck boost converter that steps up 5V to about 58V. I created 3 voltage dividers that should step the ...
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37 views
bode plot of LM3481 as boost converter
I have simulated an open loop boost converter using LM3481 average model, given by texas instruments and I got a very strange bode plot (More precisely, strage phase response), please can you tell me ...
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2answers
45 views
Buck - Boost converter inductor selection
Hello i am creating a circuit that uses the TPS63070 buck-boost converter. As i was looking at its sample circuit and application in the datasheet on page 18 (under Inductor Selection), i am given 4 ...
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1answer
23 views
Simple Solar Circuit
I had a very cheap solar panel + controller where the controller died. To cheaply replace it I was going to build my own using some parts I had laying around and use a step-down (LM2596) to limit ...
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32 views
How to activate FP6293 converter from EN pin?
I'm making a portable device which is powered by a lithium battery and boosted with a FP6293 boost converter IC. I want to turn on and off the device from a switch that activates and deactivates the ...
0
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1answer
39 views
Ramp compensation for UC1843 and UCC38C44
When we pick up the datasheets of UC1843B-SP and UCC38C44, we notice that they have the same functional block diagram, specially the PWM generator circuit (Error amplifier, current sensing PIN and the ...
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1answer
63 views
What would happen when supplying lower voltage against boost converter?
I'm new in these field. So, help please :)
3 Questions about buck-boost dc-dc converter, the module is: XL6009. I've seen this: Behavior of Boost and Buck Converters
What would happen when supplying ...
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1answer
41 views
Current Sensing Design
while using MCP1630 in switch mode power supply design, in the datasheet they gave the input bias current of the "current sense pin"
what are the considerations the designer should take while ...
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1answer
44 views
How to create a buck-boost converter with a low-voltage cutoff
Hello i would i am in need of a constant voltage regulator to power my motors, as voltage will affect the motors rpm. Although i could compensate via software, i would like to add a hardware ...
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1answer
40 views
Problem with Proteus Simulation of Buck Boost Converter - please help
I built the attach circuit, I was simulating a solar panel buck boost voltage regulator to regulate the output voltage.
The problem is that while it works and shows the appropriate output. It doesnt't ...
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0answers
40 views
Current mode boost converter design
I was trying to design a current mode boost converter in CCM using a MCP1630 and the specifications of the design are as follow:
...
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0answers
48 views
Placing Input capacitor of boost after output capacitor
I have a battery charger for 12V input with integrated buck that charges a single cell (3.7V nominal). The charger also has a power path and I would like to place a boost converter to boost the 3.7V ...
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2answers
56 views
Inductor current ripple ratio of buck boost converters
I have a question about this paper: https://ieeexplore.ieee.org/document/1210630
I have always thought that the maximum current ripple of a buck converter occurs with a duty cycle of 0.5. The paper ...
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2answers
112 views
Power electronics DC DC converter question: What is the function of the capacitor and resistor connected between two series inductors?
This is a power electronics DC DC converter question:
What is the function of the capacitor and resistor connected between two series inductors?
This is part of the schematic from a photovoltaic ...
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2answers
61 views
LTC3112: Limited Output Current
So for the past couple of days, I was testing out the LTC3112 Buck-Boost IC from Linear Tech. I'm using this for my heated glove project to step up/step down the voltage across the heating element. ...
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1answer
25 views
Output voltage of NPC1403 boost converter circuit 0 during simluation
Currently, for my needs I'm trying to boost a 5v input to 15v with a minimum of 20ma current at the output. I found the NPC1403 to require my needs however, when i'm trying to simulate using EasyEDA ...
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1answer
69 views
how to choose a dual power supply for rail to rail amplifier?
I need +15VDC and -15VDC dual supply for rail to rail supply of op-amp.
I have found buck-boost inverters used for this task.
I have a doubt whether the inductor in the buck-boost inverter circuit can ...
0
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1answer
66 views
Designing a 6V --> 40V step up converter [closed]
I need to design a step up converter with the following requierements:
Vin = 6V - 8.4V
Vout = 35 - 40V, Iout = 2.5A
Could anyone give me some insights on how to ...
1
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1answer
80 views
Noise in portable power supply to guitar effects pedals [closed]
I am constructing a battery powered power supply for a guitar effects pedal board.
There are 5 pedals and I am using a phone charging battery and a boost converter to supply 9V (centre negative) to ...
3
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1answer
69 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 ...
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1answer
46 views
Complete discharging of Initially charged capacitor through Inductor
I have been trying to simulate a parallel resonant circuit in Pspice . The idea of the circuit is to discharge C18 (Cin) completely (This cap is initially charged to 1.3 V) through the inductor and ...
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1answer
115 views
Buck-Boost converter without low side switch
Please look at the buck -boost converter below. It is 2 outputs, one buck and one boost output.
Would the circuit work as describe in the picture? In what condition the circuit will it work?
If so how ...
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1answer
31 views
LTC7813 buck-boost IC max output power
I am developing a power supply for a 24V 10A BLDC motor, which has to work with car and truck batteries (12V-24V). The real thing is that those batteries never have 12V nor 24V, instead, they could be ...
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2answers
79 views
How inverted buck-boost Boosts & Bucks
I am struggling to see how the "inverted buck-boost" converter works the same as a "4-switch buck-boost" converter. In my mind, a 4-switch buck-boost is simply connecting a buck and boost together, ...
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1answer
55 views
Buck/Boost converter TPS63070RNMT is not working properly
I am working on a Buck/Boost converter design which is based on Buck/Boost converter TPS63070RNMT. Below is the schematic design. All the selected components are as per the Section 9 of the datasheet.
...
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1answer
42 views
DC-DC charging different voltages
I have several banks of batteries on a boat, two larger banks
48v electric propulsion system with regen
12v house bank
Each has a charging source the 48 has regen up to 2kw while sailing
The 12 has ...
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2answers
60 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 ...
1
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1answer
41 views
Buck Converter and WS2812 LEDs
So to start off I am powering 70 LEDs through a 24V 6A power supply. The WS2812 LEDs require 5V operating voltage and about 50mA at their brightest setting (white light). I'm having this really ...
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2answers
71 views
I want to boost 0.45V and 0.6mA to 0.7V and 3mA suggest me a circuit which can do that [closed]
I'm doing a project that basically transfer the power from a laser and light up an led using it.
The power output we are getting from the laser is at most 0.45V and 0.6mA (we used photodiode to ...
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0answers
76 views
KCL and KVL in AC AC Buck Boost Converter
This is the circuit of ac ac buck-boost converter with 4 switches.
When \$V_{input} > 0\$, switch 2 and 4 are fully turned on and switch 1 and 3 controlled by D and (1-D) respectively, and vice ...
0
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1answer
41 views
Increasing TPS63001 Under Voltage lockout from 1.8V to 2.5V for use with LiFePO4 cell
The Under Voltage Lockout threshold for this chip ranges from 1.5 V to 1.8 V. I want to use this with a LiFePO4 cell, whose minimum voltage is 2.5 V.
With reference to the datasheet here, the VINA ...
2
votes
1answer
115 views
Current sensing techniques in SMPS
I have gone through the following circuit provided by microchip technology and I get trouble in understanding the circuit circled in red the the image!!
As I understood, this circuit is used as a ...
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0answers
59 views
Buck/Boost Regulator Problems (TPS63070)
Questions:
1.) Why do input voltages of 9v and higher cause the regulator to output voltages in the range of 1.2v to 2.0v instead of the configured 3.4v if a load is connected to the output when 9v ...
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1answer
104 views
explain the working of this circuit [closed]
I'm basically trying to understand how this Dc to Dc step-up converter work. please help me.[![dc-dc step-up voltage converter 1v-9v][2]][2] I need to design a DC DC step up converter using bjts. ...
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0answers
36 views
Battery Powered System and Input Capacitance
I have a battery powered system in which the battery is connected to a buck/boost converter to derive 3.3V from two or three AA batteries. The regulator I'm using is a TI TPS63050, and it has a power ...
2
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2answers
97 views
Buck/Boost converter interaction with MCU in sleep mode?
I am trying to design a battery powered remote controller that has the following components, TPS63802 (converter), AP9211 (battery charger/protection), Atmega328 (MCU), NRF24 (transceiver). The ...
0
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1answer
64 views
Small DC voltage boost without step-up boost circuit?
I have a simple DC circuit (Arduino related) with a USB power supply that's giving me 4.9V.
Is there a way, with minimal components and without using an inductor, to boost that voltage to 5.2V? I ...
0
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0answers
292 views
Buck-Boost Controller Arduino Nano vs STM32
I have 900W (150W*6Panels) solar panels and 12V inverter (1000VA) which have inbuilt PWM solar charge controller. The distance between pannels and inverter is around >10m and the wires are 6 sq mm ...
3
votes
1answer
124 views
How does the coupled inductor, capacitor and diode combination work?
I was reviewing a buck regulator circuit. Circuit was designed for 3.3 V output (Vout1)
simulate this circuit – Schematic created using CircuitLab
From this buck regulator output, a coupled ...
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0answers
69 views
What are the drawbacks of using a ferrite inductor in a boost converter circuit
I have dissected a boost converter so I can remake it on my own PCB. It works fine but I am now experimenting with using different inductors to reduce the overall footprint. I tried installing a ...
0
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1answer
78 views
SEPIC vs. ZETA feedback
When I was reading through the RECOM book of knowledge DC-DC, I found out that the SEPIC converter has more chance of having resonance feedback than the ZETA converter. They mention that the SEPIC has ...
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2answers
90 views
Buck Boost Battery 3.6V (Lithium-thionyl Chloride) to 5V
I hope this question has not been asked and it's not as far as I have seen.
I am developing an IoT project which uses almost no current (< 100uA) when sleeping and up to 80mA when running. The ...
0
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1answer
101 views
Adjustable non-inverting Buck-Boost converter failing right after starting in boost-mode
I am designing an adjustable non-inverting buck-boost converter based on LM5176 chip. Adjusting is done by DAC via feedback network, more on that technique can be found here.
The input voltage is 32V ...
0
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2answers
80 views
The output of a boost converter doesn't stay at 5 V
Let me start by apologizing for my english in advance :)
I'm trying to build an UPS for my raspberry Pi (even though I have basically zero experience in electronics). When the power cuts out, I want ...
0
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1answer
159 views
Low power design, choosing correct buck-boost converter for LiPo battery
I want your opinion on subject considering low power applications. I want to build basic loraWan tracker with Murata Lora module(3V3), and I want to use LiPo battery. What Im struggling with is power ...
1
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1answer
171 views
Buck-Boost converter not working right when fed by dynamo
So my plan is to charge a powerbank with a bicycle dynamo. I have got it to work with a full bridge rectifier and a linear regulator, it just isn't very effective. I used the following circuit:
(The ...
3
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4answers
326 views
How to convert a wide voltage range (1 V-12 V) to 5 V?
I have an unusual application where the input voltage can vary from 1-12 V DC. This must be converted to 5 V @ ~200-250 mA.
Since there are no available buck-boost converters suitable for this wide ...
