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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As Tony points out, datasneet will usually be some other parameter that changes along the way. Datasheets, Manuals or Parts. I am assuming these are too light for the duty they are trying to perform and would like to try and replace them with heavier Mosfets. Ken1 Member Mar 1, Articles Top Articles Search resources. Take a look at this one. A project I am doing right now needs to switch 60Amps DC.
Let’s look at a few items from the datasheet.
Potentiometer Questions Started by norbss Yesterday at Electro Tech is an online community with overmembers who datashet talking about and building electronic circuits, projects and gadgets. It seems this “entry level” datasheef has very little margin before exceeding the component limits. Electrolytic caps are a prime suspect. Don’t forget to check the caps. A bigger switch always puts a bigger Ciss load on the gate.
The unit is relatively new and hasn’t seen much use.
Nice power supply by the way. So, at 78 watts, the junction is 69 degrees hotter than the case. Welcome to our site! This is determined by the V-I slope of the driver and RdsOn of the switch. The battery charge may not have intelligent soft start and overstress the charger hooking up to a dead battery.
Not as easy as it sounds.
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 taken into account. 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. So when carrying 14 amps, it will be dissipating about 78 watts of heat.
It comes down to the fact that the current rating of most mosfets is a calculated number as to what current will put the junction temperature at it’s failure point when the case is at 25C.
Replacing a 4 pin leaded inductor with a 2 pin Started by gkmaia Yesterday at Pins 11 and 14 are the 2 outputs of the chip. 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 culprit. Maybe a little overkill but, other than the copper plates that carry the current, there is no heatsink. If the case is at 25C, the junction is at 94C. 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.
Otherwise you’ll need to resort to cold water or refrigerated cooling. So, it will only carry 14 amps if you can keep the case at 25C while it is pushing out 78 watts of heat.
Forums New posts Search forums. If the impedance gain or resistance gain is too high, you need more stages of MOSFET buffering to prevent overloading the gate resistors due to Qgs charge switch losses and switch frequency. What are you doing with it? We need to recalculate everything again based on the new info. 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.
You haven’t said what how you are using the mosfet, so it’s difficult to accurately answer your question. They are mounted on a large aluminum heatsink and the unit also has a cooling fan.