All Questions
Tagged with sepic switch-mode-power-supply
12 questions
1
vote
1
answer
127
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LM3478 MOSFET and inductors overheating
I'm trying to design a SEPIC converter based on LM3478, with input voltage range 12-36 V, and output 24 V 2 A. I'm calculated all relevant values of components, according to "AN-1484 Designing A ...
- 13
0
votes
0
answers
134
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What's causing this ringing? GaN SEPIC Converter Gate Ringing
I'm designing a SEPIC converter using a HEMT GaN from EPC (EPC2204) and a dedicated GaN driver IC (1EDN71x6U). I've been in this loop (mind the pun) trying to mitigate gate ringing, and I'm having a ...
- 325
1
vote
1
answer
153
views
How can I achieve high efficiency in a SEPIC with AC inductor losses? Where's all my energy going and why?
I'm building an asynchronous SEPIC converter with a wide input range (10-60 V) and a 24 V 2 A output. This is based on an LM5022, and I'm trying to achieve high efficiency as its heat generation is a ...
- 325
2
votes
1
answer
611
views
Ceramic output capacitor selection for ripple current (SEPIC)
I'm designing a SEPIC converter based on a wide input voltage range SMPS controller (LTC3758). The requirement is for a wide input voltage (10-60V) with a fixed output of 28V @ 1.5A. I'm trying to ...
- 325
1
vote
0
answers
673
views
Confusion of the working principle of Isolated SEPIC converter
I am a bit confused about the current flowing in the magnetizing inductance L_m when the switch is off.
I am reading a book(Erickson & Maksimovic, Fundamentals of Power Electronics, 2020), ...
0
votes
1
answer
298
views
Is a SEPIC converter truly isolated?
I have been in two separate design reviews where the SEPIC topology was rejected for an isolated < 40W application. These meetings were at 2 different companies and with different principal ...
- 1
1
vote
1
answer
224
views
SEPIC converter : why average secondary inductor is the output current?
I can't get the reason the why the average secondary inductor current is the output current.
Simulation confirms it's true, as well as documentation.
But I haven't found any clear explanation. Sorry ...
- 13
0
votes
1
answer
829
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LTspice XVII problem simulating SEPIC converter
This is the second time I'm trying to simulate a SEPIC converter today. First I went with LT3959, but after hours of trying to make it work, I assumed there is something wrong with the component and ...
- 545
0
votes
1
answer
284
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TI LM3488 SEPIC, adjustable power supply down to 0 volts
I decided to make an adjustable power supply with input voltages from 3 to 6 volts (4A), and output voltages from 2 to 12 volts. But I had a thought, that as long as I'm making it, I should make it go ...
- 545
2
votes
1
answer
238
views
Lossless Resistor model in PSpice?
Is it possible to make a lossless resistor model in spice? I want to test the large signal model of my DCM SEPIC converter (without linearizing it). OrCad's PSpice library doesn't seem to have it, but ...
- 23
3
votes
2
answers
11k
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SEPIC vs Cuk vs Zeta Converter
My understanding is that SEPICs, Cuks, and Zeta converters all provide a stable output voltage despite an input voltage that can vary either above or below what is desired. The SEPIC and Zeta ...
- 147
4
votes
2
answers
1k
views
Switching supply burning mosfets, what is happening?
I have been working on a SEPIC converter for an electronic cigarette power supply. This application involves using two 3.7v INR batteries in parallel, rated for an appropriately high current ...
- 51