smps

Hello! So the other night me and my wife had gotten a tread mill (Nordic trac elite 3700) off of Facebook marketplace for $50 and I tilted the walking track upwards last night and for some reason the incline motor decided to continuously lower itself. It appears it Endlessly increased its draw...

Hello everyone, I have a problem with understanding the power factor of a switch mode power supply. More specifically, a phone charger. So it all started with me trying to measure the efficiency of my phone charger. I just measured the voltage, then the current after loading the charger at...

Hi Experts, I've SMPS (AC to DC) which gives output of 12V, 20A, 240W, & I've to attach Peltier device (TEC1 12706) with SMPS, but Confusion is Peltier have max. Current rating as 6A, but SMPS is giving 20A, So how to limit o/p of SMPS to 6A, so it wont damage Peltier, how current regulation...

Hello, I have a power supply which have V480LA10P varistor connected at input between line and neutral but I want to replace it with the V480LA40AP from same family. Looking at datasheet they seem to have almost similar characteristics except for "Peak Current 8 x 20µs" and "Energy 10 x 1000µs"...

Hello everybody. I am trying to increase my power Supply's default 12V 3.3A output to something like 20V 3A. I Decided to use a potential resistor via the shunt regulator at the opto-coupler which i was sure it had. But the problem is that when i opened the power supply, most of the output...

I tried to understand PFC in an SMPS voltage converter. I read from many websites but still confused very much about the following things. Situation: it’s an SMPS flyback (for example) converter, to output (for example) 24v dc to an inductive load of 100W (average). Input 230v AC mains 50Hz...

Hi All, I have made an electromagnet of using 1 mm diameter wire appx 60 turns. here is the problem... i have 600W smps(computer power supply) and i want to use that to power my electromagnet. On smps it shows 3.3V with 25A and 5V with 18A. If i connect my electromagnet to one of these terminals...

Hi, I have a crt monitor that dosent work now, I figured out that a mosfet was running very hot and was shorting the smps(making it stop and restart), I removed it and saw that theres no short circuit now and the led/buttons works but theres no picture, it's the mosfet that generates the B+...

I've been looking at UCC28C43 models provided by TI. Why do we need two different Spice models such as "Transient steady-state" & "transient start-up" for MOSFET driver IC? How do we use them? When do we need these analyses? Do all microcontrollers in power electronics have such separate models...

Hello All, I have an SMPS that i want to change its transformer (image below) in the original transformer, pin 7 is connected to ground and pin 9 to a rectifier diode. with another transformer (image below) Now, the primary of both transformers are similar but the secondary of original...

I am wondering how will these two differ, One is Ac to DC converter module, second one is SMPS. Link1(AC to DC module) Link2(SMPS) when link 1 is available in a small size than Link2(SMPS). Under what circumstance we have to use Link1 and link2. I understand that SMPS is 5watt, Link1/Module...

Hello Everyone, I am currently working on a 2.5kW PSFB converter using UCC28950 ic from TI in TINA simulation (unfortunately couldn't get a similar model for LTspice). The simulation is working however I am not getting the desired results (i.e. Vout = 84V and Iout = 30A). I have a uploaded a...

Hello all, I have a SMPS power supply based on the TNY276 PMIC, I did a "No-load input power consumption" test using DMM connected to AC line input to measure current values while varing the input voltage from 85VAC to 265VAC... I got the following results: Input Voltage (VAC) Input...

Hello, i have an issue with a 12v30A PSU: low output of 4v instead of 12v, SMPS transformer noise like low frequency issue. No short element in the secondary, RT/CT of tl 494 within specs, but i suspect the capacitor at VCC of TL494 : it is only 10mF and has only 7.5V. The DC output voltage...

i have developed a small board that has a controller and a 16x2 display. I am powering up the board using external smps power supply. I want to add serge protection, so that my system will be protected from any time of serge or spikes. One option is i can use fuse but i want to know what else...

Hello i am an engineering student working on a project of Switch mode power supply with outputs of 12V 1Amp .For this reason i have used power integration software to design smps supply circuit *(Schematic attached )with 12V 1 Amp required outputs. I have implemented this Circuit on PCB as...

I am using Arduino and Controlling FAN which works on 48v. so i am using 2 power supply smps in my design. One for Arduino that 5V smps and another for FAN that is 48V smps. I want to use single power supply in my design that is of 48Vdc. I was looking for a buck converter that will take 48V as...

Hello all, I have the following 12V center-tap transformer with below number of turns, I used (Np/Ns = Vp/Vs) to calculate output but i didn't get 12V although transformer specification says it's 12V. Can someone point out where I have mistaken? Also How can I calculate primary current given...

Hello, I need to design a linear regulated supply to power an dac output stage based on op amp. It must be a negative + ground + positive one. The problem I encounter is that I don't know wich topology to select between the first and second arrangement. I suppose that the first one induce a...

Hello all, I am designing a 12V, 18W Flyback SMPS and i can't figure exactly the characteristics of high-freq transformer (Both Core, Bobbin) to send for transformer manufacturer!! Can someone already went through these procedures guide me little bit!? Regards,