All Questions
Tagged with buck voltage-regulator
141
questions
0
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1
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125
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battery voltage supply too high for electronics
I am driving brushless DC motors with an STM32 blue pill. My application includes said STM32 blue pill, L6234 motor drivers, 2 MPU5060 gyros and 2 AS5048a encoders.
I am using a 14.8V battery to feed ...
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1
vote
0
answers
105
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MIC28515 overheating with high input voltage
I've designed this MIC28515 buck regulator based on the manufacturer schematic reference. I'm planning to run it at 70VIn
I'm doing the tests with @ 5V 2A load Temp(Amb) = 20C.
When I set a VIn of ...
- 155
1
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1
answer
3k
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Buck converter input voltage lower than the designed output voltage
I have this buck converter which is designed to produce an output voltage of 9V for an input range of 18V-36V.
The datasheet of the buck converter mentions that the minimum required input voltage is 4....
user220456
1
vote
1
answer
114
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Synchronous Buck Converter Mathematics
Ive been trying to find a mathematical explanation on how a Synchronous Buck converter maintains continuous operation under ideal steady state conditions. I understand the underlying concept but i ...
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2
answers
2k
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Isolated Flyback vs Isolated Buck Voltage converter. What are the Pros and Cons?
I am working on a project where I need an isolated power supply. My input is 10-20V and I am looking to get an isolated 3.6V out @ 5A or more. My priorities are easy of implementation, voltage ...
- 231
2
votes
2
answers
179
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Can I use a buck regulator for mains voltage if I put a resistor before it?
I am reverse engineering a consumer product that I have, and the circuit seems to be mains voltage (85-250VAC) -> resistor (10ohm) -> bridge rectifier -> buck regulator -> linear regulator ...
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2
votes
2
answers
1k
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Understanding Buck Converters and Solar Panels
I have a solar panel rated at 5V 80mA and want to increase the output current significantly higher to around 500mA and decrease the voltage to either 3V or minimum of 2.7V, how can I go about this?
I ...
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2k
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Powering an ESP32 from a car 12V supply
I'm confused.
The datasheet seems to say 3.3v, but I read (e.g., https://techexplorations.com/guides/esp32/begin/power/) that one may apply up to 12V to the 5V pin.
However the car runs at about 14.5V ...
2
votes
2
answers
593
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Limiting input voltage for buck converter
I want to power some micro controllers and a couple of leds on my electric bike, counting up towards 5 Amps.
Power supply is a 36V battery, with a range of about 42V to 33V. This voltage is to be ...
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1
vote
1
answer
142
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Buck converter ringing on rising and falling edges before failure
I have recently designed a PCB with a buck converter based on the LM3671 buck converter IC from TI to step down 5V to 3.3V. However, there is ringing on the rising and falling edges, and after a short ...
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60
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In my dc to dc buck converter(0 to 17V - 12v), when i connect a load ,converter output voltage decreases to 1V [closed]
I try a buck converter of variable input(0 to 17) to 12V. when i connect a load with very small resistance , voltage decreases.if load increases , converter voltage looks constant.
what happens if i ...
-3
votes
2
answers
82
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Buck converter or regulator [duplicate]
I have a battery supply consisting of 3 AA batteries of each 1.5V.
I need an operating voltage of 3.3V.
Which choice of buck converter or regulator would be better?
My application requires 100mA of ...
- 49
2
votes
1
answer
559
views
How to calculate RMS value for current square wave?
How do I calculate the RMS value for the current waveform during a transient event like the picture below?
Assuming:
Ix = 6 A
Iy = 38 A
duty cycle = 38%
frequency = unknown
My goal is to know what the ...
1
vote
0
answers
77
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Considering the inductor in a buck DC-DC converter, how to compute the current through it?
I've been stuck for a few days to the very first point of a lab in which we analyse the behaviour of buck and boost converters. The circuit is built by the university I study in, so there is no acutal ...
-2
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4
answers
75
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Is it OK for capacitor voltage rate for this circuit?
I have a DC-DC buck converter circuit.
C5 capacitor in this circuit is 10uF with a voltage rating 10V(only available for me ).
is this circuit work as normal with 24V input??
or damaging c5(when input ...
- 1