All Questions
103
questions
1
vote
1
answer
114
views
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 ...
- 89
0
votes
1
answer
128
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
0
votes
1
answer
45
views
High Current Buck Converter with wide input voltage [closed]
I'm currently building a powerbank with PD outputs that are capable of outputting 5 amps at 20 volts, but my battery pack is 33.6V (8S Li-ion). I've managed to find a possible buck converter IC (...
- 3
0
votes
1
answer
320
views
Question regarding chinese voltmeter ammeter module
I am new to this forum. I am a Diploma in Electronics from India and a passionate DIY hobbyist too.
I have a question regarding cheap 10 amp ammeter and a voltmeter module I bought off aliexpress.
I ...
- 1
1
vote
2
answers
419
views
Drop input voltage for a boost converter
I have a 21V DC solar panel power source, that feeds a DC-DC boost converter. I set the output voltage of the boost converter to 19.5V to charge my laptop, but since the input voltage is higher than ...
- 111
1
vote
1
answer
193
views
I can't get the desired output voltage
This is a simulation of a buck boost converter. I want to get -12V as the
output voltage , but I get -1.148V.
I checked the PWM and the duty cycle and it is right.
I think that my problem in ...
2
votes
3
answers
6k
views
Is it better to have a higher Vgs than Vds on a MOSFET (n-channel)?
I've been studying MOSFET switching applications recently, and have been playing with the Circuit Simulator Applet here. In my diagram below, I have Vds usually set to either 12 or 14, as I am trying ...
2
votes
2
answers
129
views
In a buck boost inverting converter is there any difference exchanging the position of the diode from the positive to the negative rail?
In a buck boost inverting converter is there any difference exchanging the position of the diode from the positive to the negative rail keeping the same current rotational direction ?
- 152
6
votes
7
answers
8k
views
How to reduce MOSFET heating in Buck Converter
I have designed this Buck Converter which convert 60VDC to 12VDC at 10A.
Switching Freq 100KHz.
Facing MOSFET too much heating issue.
MOSFET ON time and OFF time is decided by a UC3845B based circuit. ...
- 97
0
votes
4
answers
108
views
LED DRIVER: Buck Converters output current ripple
I need to design a led driver of up to 1A, to drive some infrared and near infrared LEDs.
Due to the nature of my application, the intensity of the light should be as stable as possible, as ...
- 23
0
votes
0
answers
42
views
Step down converter stops regulating above 6V input
I'm currently using the following step down converter in a 4xAA battery powered design -> TPS62745
I have my Vselect pins configured as 3.3v out and using 4.7uH / 10uF combination on the output ...
- 143
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
0
votes
4
answers
241
views
Switching and non-switching period in buck converter
I am using TPS54260 buck converter to step down 10V to 3.3V. Load = 1A.
While measuring the output voltage and switching frequency using oscilloscope, I am observing this:
During no load condition ...
user220456
0
votes
1
answer
3k
views
What is Pass Transistor?
What is pass transistor?. How does it work?.
while reading about the DC-DC converter, I came across Pass Transistor.
2
votes
1
answer
96
views
Why do I get this waveform at the output after power down of Buck Converter
I am having a buck converter which steps down 8-16V input to 5V output. Load current = 0.6A
But upon removing the input power, I get the attached waveform.
My schematic circuit is similar to the one ...
user220456