IRFP N – CHANNEL V – Ω – 14A – TO PowerMESH™ MOSFET s . TYPICAL RDS(on) = Ω s. EXTREMELY HIGH dv/dt CAPABILITY. IRFP 14A, V, Ohm, N-channel Power MOSFET. This N-Channel enhancement mode silicon gate power field effect transistor is an advanced. IRFP V. DSS. = V. I. D(cont). = 14 A. R. DS(on). = Ω. G = Gate,. D = Drain,. S = Source,. TAB = Drain. Features l International standard packages.

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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.

Welcome to our site! It seems this “entry level” charger” has very little margin before exceeding the component limits. By continuing to use this site, you are consenting to our use of cookies. Thread starter Ken1 Start date Feb 28, I am using four amp mosfets. Give them a good look, especially those close to the hot heat sink.

To participate you need to register. Pins 11 and 14 are the 2 outputs of the chip. You need to know what affect other parameters may have on your circuit. Tc is case temperature, not ambient. We need to recalculate everything again based on the new info. My circuit is 15 volts. Misterbenn Active Member Mar 1, Otherwise you’ll need to resort to cold water or refrigerated cooling.


This is determined by the V-I slope of the driver and RdsOn of the switch.

IRFP MOSFET Datasheet pdf – Equivalent. Cross Reference Search

Media New media New comments Search media. Take a look at this one.

So, it will only carry 14 amps if you can keep the case at 25C while it is pushing out 78 watts of heat. The battery charge may not have intelligent soft start and overstress the charger hooking up to a dead battery. 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.

IRFP450 MOSFET. Datasheet pdf. Equivalent

Doable in a cryogenics lab, but not really a practical value for most real world applications. If so, can you suggest some part numbers?

There is also a visible crack in the case of the same Mosfet. It comes down to the fact that the current rating of most mosfets is a calculated number datashwet to what current will put the junction temperature at it’s failure point when the case is at 25C.

This is the datasheet I used for this discussion. dstasheet

So it will only handle 14 amps continuous if the case is kept at 25C all of the time. You must log in or register to reply here. Maybe a little overkill but, other than the copper plates that carry the current, there is no heatsink. Forums New posts Search forums. Replacement Transformer Started by ncag Today at 7: Ken1 Member Mar 1, One of the pair datssheet 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.


What are you doing with it? This means that the the junction is. Ken1 Member Feb 28, Click here to register now. Let’s look at a few items from the datasheet.

Lets take that number down to the graph at Figure 4. Often the input FETs are just the weak link and something else is the real datashet. Pin 11 which the burned resistor connects irfp45 has a very low resistance to ground compared to pin Electro Tech is an online community with overmembers who enjoy talking about and building electronic circuits, projects and gadgets.

But if increased current capacity is your only goal, there is a big trap you need to look out for. So when carrying 14 amps, it will be dissipating about 78 watts of heat. A bigger switch always puts a bigger Ciss load on the gate.