switch-mode-power-supply's questions - English 1answer

1.310 switch-mode-power-supply questions.

I'm following standard design recommendations for a IRS2153(1) half bridge driver in the following setup: The problem is that the output (measured at the joining net of Q1, Q2, L1, pin 6 and C3 ...

Goal: Testing hot side of SMPS independently of the cold /feedback circuit I tested the Mosfet on the hot side of SMPS along with the rest of the circuit ( snubber circuit, bleeder, etc - not shown) ...

I need to build a circuit to step-up 12vdc or 24vdc to 240vdc and have a current rating of at least 50A. I got this really expensive UPS from someone but it takes a 240v battery pack which I don't ...

I have searched the web thoroughly and find very little info on smps transformers. How to take them apart ... bare bones operations in Power supplies etc. I have a smps that still doesn't work after ...

When I study PFC types, and I can’t understand why in datasheets related to most CrM PFC controllers (and even interleaved PFCs) it is all about minimum frequency. If I understand correctly, PFC ...

I have one SMPS from which a bunch of wire come out for connecting 3 hard-disks maximum. I don't know whether it is in series or parallel connection. By looking at the wires it seems in series ...

I need a power supply with two 100W isolated AC outputs. The output voltage must be a 24V 10kHz sine wave. The load regulation is not so important, what is truly important is the preservation of the ...

I was looking at "What is the purpose of using MOSFET instead of free-wheeling diode in Buck topology?" and the referenced PDF which discusses the trade-offs between a traditional asynchronous Buck ...

I'm trying to make an Arduino/Rasperry Pi (whichever works best) control a wireless Socket via funk. The Socket should be turned off when no amperage is requested and (and that's the tricky part) ...

Trying my fingers on a very old SMPS circuit (15+ years) section. The open loop test circuit generates 25 kHz pulse train (12 V - 0 V) with 50% duty cycle as designed in the actual SMPS circuit. ...

I'm using the NTE0506MC DC/DC converter which boosts 5V to 6V. The output voltage I'm measuring with no load is 9V not 6V. In page 3 of the datasheet they mention that it needs a minimum load of 10% ...

As above, what are the disadvantages, risks and dangers involved in modding a class II switch mode power supply i.e. a double insulated laptop charger that is ungrounded to have the dc- output shorted ...

I recently purchased a flyback-based power supply 1 with the claimed capability of supplying (-5) to (-60) kV DC and 10 mA (adjustable speed). However, the output seems to be relatively unstable for ...

I was trying to understand the SG3525A (from ST-Micro) working. So I built a circuit as shown below. I read various articles on this chip, it mentions that to know whether its working or not, it can ...

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 ...

I'm working on an art piece based around an Arduino Mega that essentially requires power for three types of devices: Solenoids (4): 24 V, ~100 mA a piece (400 mA, 9.6 W total) NeoPixel LEDs (1280): 5 ...

I am looking to assemble a power supply with an output of roughly 600 watts. One of the components required for such an apparatus is a 40 kVDC, 20 mA flyback transformer that I managed to find and ...

In general, there are many ways for DC-DC conversion: SMPS, charge pump, linear regulators, zenner diodes, even resistive dividers. But lets say I want to create 2 voltage rails, +Vcc and -Vcc. I can ...

We have 3 motors each 0.37kW, they are now running on mains power, sometimes mains power cutoffs/fails, in that case we want the motors keep running. The motors are controlled by a PLC which do not ...

Follow on from : earlier post Below is an LTSpice simulation of an MC34063 step up (5v to 9v) circuit. As you can see, this particular circuit is working correctly, and delivering about 300mA. The N-...

See next post in this series here adding a fet All, Here is a picture of an LTSpice simulation of a very basic MC34063 step up circuit which is behaving exactly as it should, 5V in 9V out. I'm ...

I am using a NXP (freescale) 33883 H-Bridge gate driver IC to drive a simple H4 bridge circuit which is connected identically to that in the application schematic in the datasheet: I am switching at ...

Im fairly new to this level of more complex circuit design so forgive me if I sound like a newb. I'm creating a DC/DC Step down buck regulator using the LM22678 switcher from texas instruments: http:...

In a post regarding heat dissipation in a linear regulator, one answer provided this nice little pin-equivalent smps. It was a great reply, and I'll likely order a few myself. I am wondering though, ...

I made a prototype of multisensor circuit with temperature, humidity, PIR, etc using a ESP8266. My idea is to put each of this module in each house room. To achieve this and I want to put the entire ...

I have an old switching power supply for HP 712/60 workstation (+5V, +3V3, +12v). It was working about ten years ago when i've last tried to boot the system, but now one of the output voltages is at ...

I'm looking for a chip or schematic designing an adjustable buck-boost converter for charging supercapacitor cell with CC & CV capability and control it using the microcontroller serial interface. ...

I am trying to design an isolated LED driver with primary side sensing. I want my output voltage to be 48-56 V and the current to be 350 mA. The current and the voltage are controlled by current sense ...

I recently bought several SMPS buck converter supplies for a project. They all had about the same specs, typically 90-270VAC input, 12VDC output. Having an expected worst case continuous load of about ...

Here an old smps circuit which is very similar to mine. But the gate driving voltage seems to be very high in my opinion. Q1. If the gate threshold of the MOSFET is 2-4V , will the 12-15V pulse train ...

This started with my question here there is no need to read it, I put it here for additional info. I'm trying to drive two MOSFETs in Half-Bridge topology and I finally could get the pulse ...

I'm looking for the simplest/cheapest (but safe!) way to build a 4.5A test-load for an LMR14050-based 24Vdc to 12Vdc/5A step-down voltage regulator circuit. LMR14050 Datasheet Circuit Schematics ...

I tried to build a circuit as in picture below, where the LDO+MCU contains an Atmega328P, powered with an LDO: In D3 cathode, there is a main rail supply, which can be up to 20V feeding the LDO and ...

I have a project where I made a series of high power Osram OSLON blue leds using custom boards on aluminium PCB. I just put 16 LEDs in series and joined them to an appropriate constant current supply. ...

I want to design a dc-dc boost converter and manage power (MPPT) for an ultra-low power fuel which contains input voltage < 1 V and input current < 500 uA. if I choose simple boost converter, I ...

While simulating a flyback converter, I find that even in saturation mode the MOSFET, in spite of having Rds(on) around 0.74 ohms and the Ids = 5.75mA, is dropping almost the entire drain supply input ...

I recently bought a 10-30 kV DC, 8-10 mA power supply that I am looking to test before its incorporation. However, the retailer advised me that I should place a load on this power supply - as one ...

I am pretty new to SMPS circuits. I understand there's a bleeder resistor, a flyback diode ckt to power the transistorized osc ckt. I guess that the current around the MOSFET will be like a pulse ...

In many datasheets and application guides there is always an equation for ripple current, because it is fundamental to the operation of a buck or boost converter, but I never see a direct equation for ...

I have a 5 V (rated 7 A), 24 V (rated 2.5 A) and 3.3 V (rated 1 A) power supplies in my project. I am planning to accommodate this PCB into a sheet metal casing. When I integrate this into the metal ...

I'm trying to design and build a simple ac/dc smps that outputs 5v dc and capable of 2 amps. I currently have it mostly designed using a nmos but the problem I'm running into now is how to get a pwm ...

I am trying to repair an old SMPS. The first step is to reconstruct the schematic and work from there on. The schematic on the low voltage side is completed for the +12V and the +5V circuits. However ...

i have 3 X 12V battery i use them to drive a dirt bike .i want to charge them with a 36v-30A power supply the maximum charge current is 6 amps that is given by the manufacturer . will this damage my ...

My circuit and its conducted emission test result are in the attachment. The circuit is smps circuit for three phase energy meter. As you see it fails conducted emission test. What would you suggest ...

Got a question about the effect after the current over the saturation current in a buck DC-DC regulator. I'm thinking of a theory that due to the fact that the inductance will be downgraded if Isat ...

I got an audio amplifier but I have problems with that. How to remove switching noise(artifact) from the output of Behringer iNUKE NU1000 Power Amplifier ,Audio amplifier? please find I got from ...

I'm designing a circuit that has a built in single cell LiPo battery with its charger for a gsm circuit. The board feeds from a 12V power supply and uses the battery as a backup, and when the power ...

I am coming into a design that uses a custom designed, 24V brush-less DC motor controller. I am wondering, is it better to power this type of system with a linear power supply, a switch mode power ...

I will be using a DC-DC Converter from Cincon: EC4BW11 I do not understand what NP and NO means on the pinouts. I am assuming that the input voltage will be connected on pins 1 and 2 (+Input, -Input) ...

Friends have a simple circuit a switch on off using triac BTA24600B, The strange fact is that when I turn off my led lamp keeps flashing fast, this is not the case with other types of lamps, only with ...

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