All Questions
Tagged with dc-dc-converter mosfet
101
questions
0
votes
1
answer
37
views
DC-DC convertor-SEPIC architecture
I'm working on a SEPIC DC-DC convertor, in the reference design from Texas instrument there is MOSFECT which is derived by DR pin of the main controller (LM3488) as follows:
There is an diode (D4), ...
- 511
2
votes
2
answers
195
views
Calculating junction-to-ambient temperature rise for switching MOSFET
So I'm looking at datasheet's since I'm looking for a N-Channel MOSFET for a DC-DC Buck Converter that will be switching at 1.2MHz. Since the MOSFET will be used as a switch for the Buck Converter, I ...
- 53
0
votes
1
answer
87
views
UC3844 IC duty cycle problem [closed]
Recently I started building a flyback converter with a targeted input voltage of 12-24 V and output voltage of 150 V. The swicthing frequency is set to 100 kHz, for testing purposes I've used a ...
- 81
0
votes
1
answer
71
views
Current flow from Output To Input of my Buck Converter
I just made my buck converter, this is gonna used in MPPT project. I use simple buck converter in this project.
My problem is when I connect battery to output of buck converter, then electricity is ...
- 33
0
votes
0
answers
39
views
Switching Freq. and Output voltage error
Attached is the datasheet for the Synchronous Buck Controller: https://www.ti.com/lit/ds/snvsb32b/snvsb32b.pdf?ts=1711536038118&ref_url=https%253A%252F%252Fwww.ti.com%252Ftool%252FLM5145EVM-HD-20A
...
- 275
2
votes
0
answers
74
views
DC-DC Converter MOSFET Failures
I've been seeing failures in a few of my circuits in which Q17 and sometimes also Q16 are failed closed in the DC-DC converter. MOSFETs used are Vishay SiHP12N50E.
Below is a schematic reference for ...
- 21
4
votes
3
answers
310
views
FETs in push-pull converter keep blowing
I have a push-pull converter that uses BSC040N10NS5ATMA1 MOSFETs. I have also tried using CSD19533Q5A MOSFETs.
The FETs keep blowing at low power output (about 15 W). I am trying to get to 100 W. They ...
user224284
0
votes
5
answers
231
views
How can I protect a MOSFET from high voltage spikes in a DCDC converter?
I built DCDC converter using TL494 that is able to step down 30-200V to 12V with reasonable output. The circuit worked fine for quite a while, but I have always tested it while slowly raising the ...
- 145
0
votes
1
answer
107
views
Why is an LLC converter designed to operate in the ZVS region? how does the Resonance in the LLC circuit contribute to low "MOSFET losses"?
For the first question I understand that operating in the ZCS region can result in shoot through but why does that happen?
I understand that an LLC converter uses the leakage inductance of the ...
0
votes
1
answer
131
views
DC-DC buck converter's MOSFET or IGBT?
Motor Specifications:
Rated power: 50 kW
Rated voltage: 200V DC
Rated current: 250A
Battery Specifications:
Nominal voltage: 400V DC
Capacity: 50 kWh
Design Requirements of the DC-DC Converter
...
1
vote
1
answer
53
views
Multimeter reading discrepancy on output of HV converter circuit
I am trying to measure the high DC voltage after it is converted from 5 V to 3 kV through the EMCO AG30 voltage converter. I set the PWM output from the Arduino to 255, so theoretically the voltage ...
- 11
0
votes
1
answer
110
views
Problem with the output of a synchronous non-inverting buck-boost converter
I found this electronic circuit in an old research, along with the code necessary to operate it. When I applied it in the laboratory, the results were not the same as in the original research, not ...
- 13
1
vote
1
answer
84
views
Clock Driver - What's wrong with my H-bridge design?
I'm trying to design a drive board for a vintage slave clock. These things take an alternating 24 V pulse once a minute to advance the display.
Since the drive board should be powered by 5 V, I wanted ...
- 11
0
votes
2
answers
83
views
Current into DC/DC or LDO doubt
I need a circuit that regulate and invert the input signal 0-24V to 0-3.3V of output signal. Also a pullup that produce a low signal when the input is detached. I thought about a schematic like this. ...
- 61
3
votes
1
answer
349
views
Trouble with making a DC-DC converter
I have been trying to make this DC-DC converter:
I used a J380 p-channel MOSFET instead of the IRF9640 and a EK-04 schottky diode instead of the MBRS360 in the real circuit. In addition, I used a ...
- 439