IRFPA Transistor Datasheet, IRFPA Equivalent, PDF Data Sheets. MOSFET. Parameters and Characteristics. Electronic Component Catalog. SRev. A, Jun 1. Power MOSFET. IRFPA, SiHFPA. Vishay Siliconix. FEATURES. • Low Gate Charge Qg Results in. Vishay IRFPA MOSFET are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for Vishay IRFPA MOSFET.

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By continuing to use this site, you are consenting to our use of cookies. Replacing a 4 pin leaded inductor with a 2 pin Started by gkmaia Yesterday at You need to know what affect other parameters may have on your circuit. Tc is case temperature, not ambient.

IRFP Mosfet Question | Electronics Forum (Circuits, Projects and Microcontrollers)

As Tony points out, there will usually be some other parameter that changes along the way. The unit is relatively new and hasn’t seen much use.

Otherwise you’ll need to resort to cold water or refrigerated cooling. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.

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We need to recalculate everything again based on the new info. Nice power supply by the way. This is the datasheet I used for this discussion. So it will only handle 14 amps continuous if the case is kept at 25C all of the time. I am attempting to repair a Powermax PM power supply unit.


Not as easy as it sounds. But if increased current capacity is your only goal, there is a big trap you need to look out for. Electrolytic caps are a prime suspect. The unit belongs to a neighbour and he said it just quit working; he doesn’t know if it was running hot before it quit. That’s way too low as this power supply is powered by VAC which is fed through a bridge rectifier, then filtered with an uF V capacitor then fed to the Mosfets through the SMPS transformer.

Lets take that number down to the graph at Figure 4. Pin 11 which the burned resistor connects to has a very low resistance to ground compared to pin You must log in or register to reply here. Thread starter Ken1 Start date Feb 28, My rule of thumb is the impedance of each stage, where the ratio of impedances of successive stages should not exceed and ought to be in the 10 range, so that RC dynamic losses don’t dominate and exceed conduction losses.

I am assuming these are too light for the duty they are trying to perform and would like to irfp450w and replace them with heavier Mosfets.

Ken1 Member Feb 28, Replacement Transformer Started by ncag Today at 7: If the case is at 25C, the junction is at 94C. Media New media New comments Search media. So, it will only carry 14 amps if you can keep the case at 25C while it is pushing out 78 watts of heat.

Take a look at this one. A bigger switch always puts a bigger Ciss load on the gate.


So when carrying 14 amps, it will be dissipating about 78 watts of heat. A project I am doing right now needs to switch 60Amps DC. It seems this “entry level” charger” has very little margin before exceeding the component limits. Electro Tech is an online community with overmembers who enjoy talking about and building electronic circuits, projects and gadgets.

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Let’s look datassheet a few items from the datasheet. So, if you’re looking for a mosfet to continuously carry 20 amps, you will probably need a mosfet s with current capacity 3 to 10 times 20 amps. Misterbenn Active Member Mar 1, If so, can you suggest some part numbers? Irfp450q am assuming these are too light for the duty. Often the input FETs are just the weak link and something else is the real culprit. Doable in a cryogenics lab, but not really a practical value for most real world applications.

There is also a visible crack in the case of the same Mosfet.

IRFP450A Datasheet PDF

Maybe a little overkill but, other than the copper plates that carry the current, there is no heatsink. One important fact that everyone need to be aware of when choosing mosfets, is that the current rating has a fine print disclaimer that causes problems if not datqsheet into account. My circuit is 15 volts.