All Questions
103
questions
4
votes
3
answers
3k
views
How synchronous buck converters continue to operate in light load conditions
simulate this circuit – Schematic created using CircuitLab
For all intents and purposes lets assume this basic power stage of a synchronous buck design above. Let's also assume a steady state ...
- 41
0
votes
1
answer
2k
views
Do I need to protect buck converter when switching to alternate power source?
Noob question here; please pardon my ignorance. I am trying to power some 12v devices, (e.g. Peltier cooling device and fan ~4A), optionally from one of two power sources:
12v DC In
DROK Waterproof ...
- 3
-1
votes
2
answers
455
views
build or buy buck converter
Hi I am looking to step down a 10 volt DC to 5 DC with low output current (less then 1 amp)
Is it the best to build a buck converter or to buy it ready ?
thank you
Actually I am using an arduino,
I ...
- 29
6
votes
2
answers
5k
views
Behavior of Boost and Buck Converters
I have a couple questions about boost and buck converters.
First, do they try to hold the output voltage constant, or do they alter the input voltage by a constant factor? For example, if I change ...
- 436
1
vote
0
answers
1k
views
Buck converter freewheeling diode short circuit damaging the FET
I have a classic buck converter configuration (http://en.wikipedia.org/wiki/Buck_converter) with IXFK120N65X2 power mosfet used as switch and VS-8ETL06PbF used as freewheeling diode. The input voltage ...
- 173
0
votes
1
answer
1k
views
problem with a simple buck converter
Here's a very basic buck converter circuit. The goal is to convert a 6V battery source into a fixed 3V output.
The efficiency of this converter is about 60%. That's not any good at all and I tried ...
- 1,804
2
votes
2
answers
810
views
LM2596S-ADJ DC to DC buck converter
Does the Schottky diode current rating affect the performance of a DC to DV buck converter when loaded? I'm using a 1N5822 Schottky diode instead of a 1N5825 on a National Semiconductor LM2596S-ADJ ...
0
votes
2
answers
445
views
Synchronous Buck High Side Driver - Why is the Fall Time of High-Side Gate Drive so Slow?
Below is the picture of my gate drive signals. The blue trace is the low side gate signal and the yellow trace is the high side gate signal. Both signals are measured across the gate and source of the ...
- 121
0
votes
1
answer
157
views
Multi-phase Buck Converter - Does the inductor breakdown during the startup transient?
In a multi-phase buck converter, when and how does the inductor breakdown?
Lets say the multi-phase buck converter has the following parameters:
V_in = 50V, V_out = 25V, P_in = 225W (so max amps = ...
- 121
0
votes
1
answer
507
views
How does this non-isolated buck converter work?
I found this converter-circuit on the Internet. I will use it to power an IR2153, which contains a 15,6V zener.
I chose to use it because of the large losses of a resistive dropper.
The unmarked ...
- 31
0
votes
1
answer
263
views
Buck converter question
I am trying to design a step-down power supply. I was searching and browsing from Texas Instruments products and found one that might be the best for my use. I want to step down from 24V to 5V, output ...
- 135
1
vote
2
answers
370
views
Is this inductor and caps a good choice for a buck converter?
I wanted to get together a simple and efficient 12V to 5V switching power regulator using only through-hole components that can be soldered to a nice protoboard. For my purposes, I need to provide 0....
- 11
0
votes
3
answers
335
views
Question about Non-isolated Buck Converter [closed]
I have a tutorial problem about buck converter with MOSFET, anyone can help?
During the test of the non-isolated buck converter (see the circuit below), when we measure the gate signal, there is an ...
- 3
2
votes
0
answers
540
views
very high current buck converter
Need to convert 40 volts to a 24 volt 2000 amp 1 second duration pulse. long duty cycle. Current must be settable from 500 to 2000 amps and time from 0.1 to 1.0 seconds. Ideas please.
- 31
1
vote
1
answer
3k
views
Upgrading automotive heater blower motor resistors with a PWM based device
My 2004 car has a resistor module attached to the DC heater motor circuit that has three coiled resistance wires (2.1 Ohms, 1.5 Ohms and 1 Ohm), two which have burnt out as only two out of four speed ...
