All Questions
Tagged with buck voltage-regulator
141
questions
5
votes
4
answers
8k
views
What is the difference between voltage regulators, resistors, and buck converters?
I am new to electronics and I would like to know the difference between voltage regulators, resistors and buck converters like the LM2596 and their advantages, disadvantages and use cases.
I tried ...
- 96
0
votes
2
answers
174
views
I would like to drop a variable DC voltage from input 30Vdc to 200Vdc to output 5Vdc with a max 200mA
I am new to electronics and would like some help if possible.
The incoming voltage will be variable from 30Vdc to 200Vdc coming from a bank of solar panels. The output is 5vdc at a max of 200mA. I ...
- 11
1
vote
0
answers
78
views
What voltage regulator is used for PoE Splitter and Switches?
What is the working principle / hardware that is used for common PoE switches or PoE splitters. Please see following hardware examples:
TP-Link PoE Switch
RPI PoE Splitter
I am asking this question ...
- 377
-2
votes
1
answer
139
views
Does a voltage limit in a battery increase amperage over all? [closed]
I have an 18 V battery with a 4 Ah battery. If I limit the voltage output to 9 V with a buck converter or voltage regulator, how would limiting the voltage affect the amount of current output?
- 1
5
votes
3
answers
2k
views
What is the purpose of capacitor C4 (47 pF) in the feedback network of this buck converter circuit?
What is the purpose of capacitor C4 (47 pF) in this circuit?
Datasheet
- 214
0
votes
3
answers
1k
views
Buck converter unstable output voltage
I am trying to use an AP6507 to power a Raspberry Pi from a 12V battery. In the datasheet is written that it should provide a continuous current of 3A, but when I try to power the Raspberry Pi, the ...
- 1
0
votes
2
answers
525
views
Low-dropout buck converter [closed]
Do they even exist?
I looking for a solution where I have a system with the voltage can vary between 12-20 V, and I need a stable 12 V 5 A output (or more).
I'm using a regular cheap buck converter, ...
- 19
0
votes
1
answer
62
views
Can I margin a synchronous Buck regulator to output all the way from 0V to VIN?
When using a synchronous buck regulator without bootstrap supply for its top MOSFET, it should be possible to margin the output voltage all the way from 0V to VIN by feeding an additional CTRL voltage ...
- 22.5k
-1
votes
2
answers
273
views
Buck / step down voltage in limited space
I am designing a small PCB. The supply voltage is 12V, but I also need 5V with supply of maximum 250mA.
The most obvious solution is to use voltage regulator - there are plenty of them and some like ...
- 555
1
vote
1
answer
221
views
Design a PMOS buck converter - some guidance needed
Some data:
Vin ~24VDC/12VDC
Vout ~12VDC with worst case 4A peak current (short) or around 2A continuous.
Parts: PMOS Schotky Inductance
Board is put into a switch cabinet with no direct air. Only ...
- 311
0
votes
2
answers
104
views
How can the output current be programmed in the LTC3649 step-down regulator?
I use Analog Devices' LTC3649 regulator as a step-down regulator. It is said that there is a programmable output current in the datasheet, but I have no idea how to do this. Does anyone have an idea ...
- 11
0
votes
2
answers
373
views
Charging mobile with solar panel Issue
I want to charge mobiles using a solar panel.
Most phones would charge well with 5V 1A/1.5A.
My panel specifications are as follows-
Key points:
Maximum power 10Wp (peak wattage)
Voltage at maximum ...
1
vote
2
answers
324
views
Idiomatic way to control output voltage of buck/boost converters using microcontroller
I'm trying to design an appliance that efficiently regulates power to some Peltier elements.
The manufacturer states that optimally, you should drive these with regulated voltage and not PWM. They ...
- 171
-1
votes
2
answers
348
views
I need help for design high voltage buck converter
I have a 500 Vdc from rectified 3 phase power and then I will make output to 220 V phase to phase 60Hz power. But 500 Vdc doesn't stabilized and Its need to step down to 220 Vdc stabilized.
So, I use ...
- 115
0
votes
1
answer
307
views
Simple buck circuit reducing 240V AC to around 5V at 300mA
I work with a lot of ESP8266 microcontrollers, and often need to power them from 240V AC mains. This generally involves either a wall-wart or a dedicated isolated module such as the HLK-PM03.
However, ...
- 1,465