All Questions
99
questions
0
votes
4
answers
246
views
Best option from 30–60V to 3V3
I need to take power from ebike's battery (30–60VDC) for a datalogger (3V3) based on STM32 with almost no consumption.
My question is what is the most efective conversion from 60V to 3v3?
Is it good ...
- 15
0
votes
1
answer
129
views
Wide Range Input DC DC Buck Convetrer Design
Im having trouble understanding how i can achieve a constant output voltage with a varied input voltage. I know how to design a buck converter with a constant output when the input voltage is fixed ...
- 89
4
votes
1
answer
880
views
Why 2 diodes in parallel buck converter design?
I have been looking up dc-dc buck converter designs and have question regarding the diodes.
It says "5A High current Schottky diode" is it common in buck converter design to parallel ...
- 127
0
votes
1
answer
46
views
Buck converter output power definition
I'm designing a buck converter to feed the following loads:
A control circuit 3.3V/100mA
A 80V solenoid which has a DC resistance of 300 ohms. This means a current of ~270 mA.
My plan is to ...
user115094
1
vote
1
answer
1k
views
Creating a DC input ATX power supply using buck converter
I am working on a project which requires me to use a battery to run a computer. I planned to work with a 24V battery connected to a DC input (24V,1000W) ATX power supply and connect it to the PC. But ...
- 11
2
votes
3
answers
301
views
Why do some switching regulator ICs have single VCC pin but multiple PGND pins?
This is a follow up question to Reason of multiple GND and VCC on an IC
I found a switching regulator IC (buck) that has multiple PGND pins and one analog ground (AGND). It has only one VCC pin.
(...
- 3,032
0
votes
1
answer
223
views
The best way to bring drop 700VDC to 12VDC?
I am currently working on a PCB design that will be using 12VDC to power all of its components. It will be mounted on a vehicle, which is powered by an external power supply, which supplies the ...
- 57
0
votes
1
answer
56
views
How to measure correctly efficiency at high load with LT8646
i'm trying to measure efficiency of a LT Part LT8646 at high load with the attached schematic.
i'm using a dynamic load and a power supply to give 12V. I'm using a digital multimeter to read the ...
- 11
2
votes
0
answers
329
views
Inconsistent Output Voltage in DC-DC Buck Converter
I'm trying to implement the following tps54302 DC-DC buck converter, for a 5V 3A output:
All resistor values 1% tolerance, capacitors 5% tolerance, inductor 20% tolerance.
I'm testing with a bench ...
- 21
1
vote
1
answer
251
views
Power a guitar pedal (usually takes 9V power) with a single AA battery
This is not necessarily for real life application, but more for the challenge: would it be possible to power an existing guitar pedal (let's say a Roland / Boss saturation, fuzz, reverb, delay, etc.) ...
- 1,946
0
votes
1
answer
162
views
JSN SR04 not giving correct readings when connected to ESP32?
When I connect a JSNSR04 to ESP32 and power it with USB of my computer, I am able to get correct readings.
But when I power it with buckconverter for short distances ( <150) JSN gives correct ...
1
vote
2
answers
350
views
(THEORY QUESTION) If a diode was not placed in a buck convertor, when the switch is off would the load still be powered on?
(For Theoretical Purposes and Understanding assume the diode is not in the circuit)
I just have a bit of confusion regarding the buck convertor when the switch is off. Since an inductor cannot change ...
- 495
0
votes
1
answer
234
views
Buck converter LC output filter contribution to phase margin
I'm trying to develop a better understanding of how my power distribution network can affect the stability and performance of buck converters, which has lead me to documents like this one.
The main ...
- 1,439
1
vote
4
answers
3k
views
How does a buck converter increase current?
I am confused regarding this. In a buck converter, Pin=Pout. If I reduce the voltage then the current has to increase. If my resister load is fixed at, say, 5 ohms and resistors follow Ohm's law, ...
0
votes
3
answers
987
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? ...
- 397