4
votes
Identify IC marked 'MABK S14B'
It's a Texas Instruments LM3478MM switching regulator controller.
(Source: lcsc.com)
- 7,843
3
votes
Help identifying PWM controller SMPS ICs and other
It's probably an On-Bright OB2361MP PWM controller.
There are some variations in the markings when you search for pictures online, but here is one from taobao that shows similar markings:
(Source: ...
- 7,843
2
votes
Accepted
Can anyone help me to identify an IC marked FSHT?
It's a ACT512US-T PWM controller made by Active-Semi (now Qorvo).
(Source: alibaba.com)
- 7,843
2
votes
Accepted
Buck/boost inductor design calculation
I think you are misusing the formulas because they are producing minus signs for inductance. Below the formulas are these words for equation 3: -
...
- 473k
1
vote
Switched mode PS2 power supply failure
You destroyed it with overvoltage by plugging a 100VAC device into 220VAC mains. The main bulk capacitor is rated for 220VDC which is good for rectified 100VAC being about 140VDC, but rectified 220VAC ...
- 172k
1
vote
Accepted
Fundamental question regarding the working of a PWM voltage mode controller in SMPS
My doubt was what happens once the output is 10V and the error is
zero?
It won't happen; the error won't be zero because it needs to be finite to drive the right level of PWM. It's exactly the same ...
- 473k
1
vote
Forced CCM Buck Operation
Modern buck converters switch to DCM at low load currents for better efficiency.
The trade-off is higher ripple due to DCM.
With an extremely sensitive digital circuit like an FPGA being powered, that ...
- 172k
1
vote
Diagnosing possible SMPS feedback loop failure
Granted yes, I changed the same four caps as mentioned above (One- 400V 120uF, three - 35V 1000uF), but I found the two 50V 10uF caps (green electrolytic caps) were my issue with the other four.
The ...
- 11
1
vote
How to find mean length per turn (MLT) for magnetic design from ferrite cores datasheet?
Conventional low frequency transformers with a square or rectangular core and no waste laminations. I put the measurements of say Miles Platts bobbins into a database including the wdg width for 1 ...
- 11
Only top scored, non community-wiki answers of a minimum length are eligible