A non-isolated DC/DC converter topology.
0
votes
0answers
21 views
Choosing a power management solution
I am working on a project where i have to integrate various low power modules such as microcontroller's and IMU's with high power devices such as motor drivers and laser sensors. All of the components ...
0
votes
1answer
42 views
Boost 12V to 24V, high current output
There are a lot of dc-dc boost modules that step 12V to 24V but are limited to low current. Is there a reason why stepping up voltage, while keeping the current high is not available?
In my case, I ...
0
votes
1answer
80 views
How to turn off DC-DC step-up converter to run on 3 AA batteries
simulate this circuit – Schematic created using CircuitLab
I am using this step-up converter :
DC-DC step-up converter
with 3xAA batteries (input voltage for the circuit is ranging from 4.65v ...
1
vote
1answer
34 views
Why boost converter efficiency increases at low D and load resistance?
This slide (page 19) analyzes the efficiency of nonideal boost converter. As you can see from the formula below, the efficiency of boost converter is dependent on duty cycle D and load resistance RL.
...
2
votes
2answers
242 views
boost 100ns pulse from 5 v to 10 v
I have to amplify or "step up" the voltage of a pulse generator.
I have a pulse generator, which generates 5 volt pulses with on times ranging from 100nano seconds to 1200 nano seconds which repeats ...
3
votes
0answers
35 views
Current sensing for backup battery circuit with LiPo charger
I'm trying to design a circuit that provides backup LiPo battery power to a +5v rail. The rail is sometimes powered by an external USB supply and sometimes not - I want my circuit to act as a power ...
0
votes
2answers
40 views
Buck-boost INPUT voltage regulation stability (MPPT)
I am designing buck-boost converter with Maximum Power Point Tracker. The idea is to build feedback loop that regulates input voltage by changing output current. Output will be connected to Li-Ion ...
1
vote
0answers
52 views
High voltage, low current, power supply for night vision gen. 1+ tube - single AA cell or 3V
I would like to build a new power supply for a gen. 1+ night vision intensifier tube, the current supply is robust but big and heavy plus the input is 9 to 24V.
The tube it self requires approximately ...
0
votes
0answers
31 views
Dual Li-Po to 5V Boost? [duplicate]
I have asked many questions regarding specifics for a project I am building, and each of them has been too specific. I will make this one (hopefully) simple: I have a Li-Po battery that outputs ...
3
votes
3answers
61 views
Would this isolated boost topology work?
I've been trying to create an isolated DC/DC converter for cell balancing but I can't seem to get the topology quite right.
In the topology shown in the picture, the cell is on the left and the ...
0
votes
4answers
73 views
Boost Converter Woes
I am having some issues making my boost converter (TPS61085PWR) output the correct amount of current to 3 LEDs connected in series. I am using a 600 mAh 3.6 V lipo battery to power the circuit. When ...
1
vote
1answer
46 views
Boost regulator: Using inductors with greater value than datasheet suggests to improve performance?
I want to get the best performance out of the Boost Regulator MCP1642B, specifically highest output current at 5v output for low voltage input (0.9v).
The datasheet says :
the inductance value ...
0
votes
0answers
34 views
Boosting a single-cell Li-ion battery output to 18V @ 0.8A
So assuming 100% efficiency of the conversion and an input that may vary between 4.2V to 2.5V, because of reduction in charge and very harsh temperatures (device being powered has to survive very low ...
1
vote
1answer
42 views
Single IC for LiPo 18650 cell charger and boost?
I discovered USB power banks for a mere $1 (excluding battery) that seem to have an IC that handles everything from charging the battery to boosting output to 5v. It is apparently rated at being able ...
1
vote
0answers
51 views
MC34063 boost converter + PWM dimmer unstable output problem
I use NE555 & MC34063 to build a LED driver with dimmer function. The crcuit of NE555 , MC34063 & LED are bridged by a IRF640N NMOSFET. NE555 is responsible for adjusting the brightness and ...
0
votes
2answers
72 views
Input Capacitor Selection for Boost Converter
I'm learning about boost converters right now and have started designing one. However, I can't find the equation to calculate the input capacitor. The readings just mention that the value is listed on ...
0
votes
3answers
94 views
Powering neon indicator lamp from battery
I would like to power neon lamp like NE-2 from low DC voltage like 1.5 V battery.
Is it possible to boost low voltage like that to 85-120 volts which is needed for neon lamp? And can i use blocking ...
2
votes
2answers
160 views
Generating high voltage (100V+) from 5V USB supply
I am using an USB port as a power supply. Is there a way I can take the weak 5V of a regular laptop USB and transform if to 100V+ while begin in the smallest package possible. I've heard of boost ...
3
votes
2answers
521 views
Do DC-DC boost converters that accept a wide voltage range always require feedback to maintain constant output voltage?
I've never taken a formal power electronic course and am trying to learn a little bit about boost converters.
I assume there are different boost converter designs based on what you're trying to do, ...
1
vote
0answers
33 views
Active EN Pin When Device is Plugged in
I'm looking to use a TPS61xxx series DC-DC boost converter for a charger, but I only want the converter to be active once the USB cable is plugged into the receptacle.
Now from my understanding, some ...
0
votes
1answer
44 views
cascade of boost converter and an inverter
i am designing DC to AC converter. The first phase of the converter is a boost converter that will boost voltage from a 12 V battery into 30 V. Then the 30 V is fed to an inverter that will invert 30 ...
0
votes
2answers
51 views
MC34063 heating & low performance problem
I designed below circuit to provide 45V/200mA for a LED ceiling lamp.
First, I built it on breadboard. Everything was fine. No voltage drop. MC34063 was warm and transistor TIP31C was hot but can ...
0
votes
0answers
34 views
Boost converter - 24 V to 105 V at 1 Amp using Tiny45
I am trying to design a boost converter that will take 24 V from a battery and boost it to 105 V @ 1 A. I am using the going to use the attiny45 to generate the PWM and a TC4420 driver. I have ...
1
vote
1answer
59 views
Calculating Amperage After Boost In DC-DC Circuit
To keep this simple, I am trying to figure out what happens to the amperage when having the voltage boosted in a DC-DC circuit.
For an example here, Lets assume that the power source is a 26650 ...
0
votes
1answer
36 views
how to design transmitter circuit Ma40s4s ultrasound
I want to generate a pulse that have frequency 40khz and amplitude 20VPP to MA40s4s ultrasonic sensor operate. I use raspberry to generate pulse 40khz-5Vpp then using a IC CD4049BE to boost it into ...
0
votes
2answers
51 views
How to efficiently step up high amperage source by just a few volts
My car has an alternator that supplies 90A at 28V (it's a 24V vehicle). However, I have now fitted two AGM batteries in series, which like a higher (14.8V each) charging voltage. Therefore I would ...
0
votes
0answers
55 views
MOSFET behind 100W constant current Boost Converter for PWM control
Like some other people already did, I want to build a 100W (in this case, 2x100W) LED "flashlight" (which is more of a portable floodlight).
In my build, I want to use 2 100W constant current boost ...
-1
votes
2answers
58 views
buck converter and regulator
First:
I want to use DC DC Stop Down Buck Converter, im using this one:
- https://www.aliexpress.com/item/10pcs-24V-12V-to-5V-3-3V-3V-DC-DC-1A-Step-Down-Converter-Voltage-Regulator/32671102728.html
...
0
votes
2answers
54 views
digital control of voltage step up to 100W LED [closed]
I am trying to control the voltage going to a 100W high CRI LED, which requires 3A in and a voltage between 20 and 40 V. Normally, a 12V power source could be used with a voltage step up board to ...
4
votes
2answers
102 views
DC-DC Boost converter in Parallel
I'm trying to power a 12V 1A device with 1 cell lipo battery. At 12W, the lipo would need to provide 3.24A (assuming no power loss) to step up the voltage to 12V and providing 1A.
However the DC-DC ...
0
votes
4answers
84 views
Can anyone explain what is doing this diode-capacitor branch on a Boost converter?
I've analized the circuit through capacitor currents to find the transfer function, but I keep getting to the exact same transfer function of the typical Boost converter, is the Diode-Capacitor branch ...
1
vote
2answers
59 views
Identify “ZL5P” IC in laser driver
I would like to find a datasheet for a part labelled "ZL5P", found on a small PCB inside a very cheap laser pointer.
(large solder blob on left is 3V input, blob on right is GND, laser
diode is black ...
0
votes
0answers
46 views
Measuring output current of a switch mode IC
We've been playing with the idea of measuring the current of a switch mode regulator by measuring the "ON" time of the switch (either gate drive or collector/emitter). I was wondering if anyone had ...
0
votes
2answers
100 views
Calculating boost converter maximum current output
I built a simple boost converter from junk parts to step a 9V battery up to around 100V so I can tinker with some neon bulbs. (Schematic below.)
I didn't have any inductors in my parts bin, so I ...
2
votes
2answers
138 views
switching noise from ltc3780
I have currently built a buck-boost converter using LTC3780 on a breadboard following this deisgn.
The circuit is calculated and designed to accommodate the input voltage given in the schematic. I ...
0
votes
2answers
80 views
Debugging a boost converter (TPS61220)
I'm trying to debug a incorrect output voltage from a boost regulator (TPS61220). The schematic is below. Pointed colors represent the measuring points in graphs underneath:
The graphs show the ...
1
vote
2answers
63 views
Finding the first pin on a tps61220 smd boost converter?
I'm trying to find an unambiguous way of finding first pin of the tps61220. This is the chip I've experienced the issue with, but am hoping that the answer could contain an approach applicable for ...
-1
votes
2answers
156 views
5v to 12v converter circuit
I need to make circuit which can convert 5v to 12v. I searched this on google and found many amplifying IC but I my requirement is a bit different.
I need to control 100 leds with arduino. I am ...
2
votes
1answer
110 views
3.7 to 5V Boost Converter Design Issue
I am an electronics hobbyist who has started dabbling in making circuit boards for my projects.
I have designed and fabricated a board for a solar powered sign I am making. The sign essentially ...
0
votes
0answers
36 views
driver for mosfet irf520n for boost converter
I'm trying to use a arduino due to turn on a n-channel MOSFET (IRF520N) to switch on a voltage of 12V for a boost converter. the arduino due io is 3.3v.
I have attached the schema of my boost ...
2
votes
0answers
115 views
Schematic for common buck/boost converter designs
Does anybody know the schematics of these common LM2596 buck converter with current adjustment and buck-boost converters from ebay? I know I can easily buy it cheap but I like making my own modules ...
0
votes
2answers
63 views
Auxiliary swicht-mode-power-supply topology
The application notes of several boost-converters, e.g. from TI (TPS61070, p.18) or LT (LT3464, p.14), show similar unregulated auxiliary output circuits for doubling or inverting the (regular) ...
1
vote
1answer
108 views
Combining buck and boost converter with a single potentiometer
I'm designing a buck boost converter for a simple variable power supply by connecting a boost(LM2577) converter circuit and a buck(LM2596) converter circuit in series. They each have a potentiometer ...
0
votes
0answers
51 views
boost converter component selection
i want to design discrete boost converter with I/P=5v and o/p=24v with load current of 1 AMP .how I choose input,output capacitor and inductor values what formula used for those selection..pls hlp me ...
1
vote
1answer
90 views
Boost converter drops to 4.5V when trying to achieve 6V with an 18650 cell
I don't have a lot of experience with this but I'm working on a prototype device which I want to run off a 18650 cell. I need to boost the voltage from 3.7V to 6V using a boost converter that uses a ...
0
votes
2answers
68 views
bandwidth of digital control design in conventional dc-dc converter
I designed conventional single inductor two output dc-dc boost converter in psim. This means inductor energy is stored and thrown to 1 output at one cycle and charged and discharged to the 2nd output ...
0
votes
0answers
45 views
Driving (and dimming) LED
Inspired by this video (https://www.youtube.com/watch?v=kh9j5mDU_hA) from DIY Perks in Youtube, I'm trying to convert my lantern torchlight into LED ones, using this kind of LED. (10W, 9-12V, 900mA).
...
0
votes
0answers
41 views
Using a single cell LiPo in a 12V system (how to do the DC-DC conversion)
I have a low power 12V system that I want to add a battery backup to.
Unfortunately I only have space for a single cell LiPo battery (3.7-4.2V) or a small bank of supercaps (~6V if I string a few in ...
2
votes
3answers
263 views
Zener diode selection in a led boost ic circuit
I'm wondering how to select a correct zener diode value for this led driver I am using RT4533AGJ6 (link to datasheet). My understanding of boost converters is limited, although I understand that there ...
0
votes
1answer
143 views
DC-DC boost converter using multisim. Output voltage keeps changing with input voltage
Link to circuit schematic simulation
The circuit is from the above link. There is some problem with the control loop. The output voltage doesnt stay constant within the input range of 12-24v for ...
