All Questions
17
questions with no upvoted or accepted answers
2
votes
0
answers
120
views
Power circuitry not coming up
I've created a PCB that has two buck/boost converters, the second one being connected to the output of first one. The enable pin of the second buck converter is connected to the PG pin of the first ...
- 163
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
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
0
answers
243
views
Synchronous DC-DC buck converter body diode switching loss
I have a couple of questions regarding the body diode of MOSFET.
I was looking at the calculation of the switching losses in the synchronous buck converter.
For calculating the turn-off switching ...
- 43
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
1
vote
0
answers
302
views
TI's bypass mode step-down converters
Texas Instruments encourages the use of the TPS62730 step-down converter with bypass mode along its RF devices. Does this mean :
its noise is low enough not to affect RF ? Thus being a more efficient ...
- 35
0
votes
0
answers
51
views
DC-DC boost Converter for a motor load
To give some context I have a 250 watt DC motor It is powering an electric race car for a school race my class is competing in. The rules say I have to use a specific unmodified motor supplied by 2, ...
0
votes
0
answers
50
views
Can a buck converter functioning in CCM have non-linear behaviour at light load currents?
I've been designing a Simulink/Simscape model of a TI buck converter launchpad (https://www.ti.com/tool/BOOSTXL-BUCKCONV) and I'm trying to have my model fit the behavior of the device.
The board can ...
- 1
0
votes
0
answers
41
views
Low Side N-Channel 75V to 12V Buck Converter with feedback
I want to design a buck converter for E-bike with 75V input and 12V, 20A (240W ideal case) output to drive the other components of E-bike using n-mosfet as a low side.
I also want to use a feedback ...
0
votes
0
answers
58
views
Using 2 LiPo Batteries via 2 Buck Converters for External Notebook Power Supply - will it work?
I have an old ThinkPad X220T notebook of which the internal battery is broken (and removed).
To get my notebook working on the go again I want to build an external portable power supply with 2 LiPo ...
0
votes
0
answers
247
views
How to design a filter for multiple buck converters
I am designing an electronic circuit with multiple buck converters on it. All bucks are supplied by a 12V DC input voltage from a converter which is on an other card. I want that my converters don't ...
- 1
0
votes
0
answers
28
views
power available to a DC-DC step down atached to an ac power adapter
I have an AC-DC power adapter with output rated at 3.42A @ 19V and a Step Down Buck converter Xl4015 rated to manage up to 5A with 96% efficiency conected to the power adapter output.
What is the ...
0
votes
0
answers
111
views
Buck converter design review - updated
Last week I asked this question attempting to find a solution to efficiently converting higher voltage to lower voltage.
From the answers, I arrived at TI Power Designer and I ended up with this ...
- 360
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
0
votes
0
answers
210
views
DC/DC Buck Converter PCB Layout Help
Most examples I find are for buck converters on a PCB of their own with massive traces. I want to make sure this layout is fine with the planes I'm using(both top and bottom copper pour layers are GND)...
- 35