IRFP Transistor Datasheet, IRFP Equivalent, PDF Data Sheets. MOSFET. Parameters and Characteristics. Electronic Component Catalog. IRFP TO IRFP NOTE: When ordering, use the entire part number . G. D. S. SOURCE. DRAIN. GATE. DRAIN. (TAB). Data Sheet. July irfp MOSFET are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for irfp MOSFET.

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Finally, I’d like to thank Mitch for his contribution, since it describes the issues and how to solve them in an easy to follow manner, keeping complexity to the absolute minimum in the final design example.

The sound is superb. Can I use 20pf in place of c4 n c5?? So a Class-A driver would need bias set to 3. The graph was taken from the Jrfp9240 data sheet, but has been colour coded to make identification of each graph easier. The current through Q5 and Q6 will be identical.

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R1 to make zero current flow thrbough speaker. However, the two are directly related, so the point is moot. If no, then what should I change in power supply??? At the gate-source voltages needed to obtain typical bias currents, even a small temperature increase causes a large drain-source current increase, so the use of a carefully designed bias servo Q5, R5 and R6 in the Figure 4 schematic is absolutely essential.

Rather than increasing irf;9240 safety margin, the larger device is more likely iefp9240 fail if it is working well below the ‘inflection’ current in a linear circuit. The update below has some important information that I recommend you read thoroughly and make sure you datasyeet before settling on the use of HEXFETs in your next amp project.

Thank you very much! I need your suggestions I need your help seetharaman sir please reply. See the IR application note for more detailed information [ 4 ]. For stereo you have to double the current of transformer. HEXFETs operated in linear mode need to be derated from the claimed maximum dissipation, and my suggestion is that a maximum of half the rated power dissipation is reasonable.


This voltage is usually taken from the main supplies, so for a given supply voltage, expect a little less output power. What is not commonly noted is that all MOSFET devices have a fairly high negative temperature coefficient for the gate-source threshold voltage V th.

Normalising simply means that everything is taken back to a reference of unity, so simply multiply the claimed V th by the figure shown along the left side, for the temperature at which your device will operate. Use the following link for your PCB layout http: An example would work nicely here If you are using 2 similar amplifiers yes with proper insulating kits you can use provided the sink is sufficiently big to take care of the generated heat.

This will cause it to get hotter, so the threshold voltage will fall further and it will then draw more current, causing it to get still hotter.

Irvp9240 R20 limits the input current to Q1 C7 bypasses any high frequency noise from the input. While it worked well enough, giving the expected power output and with fairly low distortion, as noted above the required bias current is quite high to reduce crossover distortion to an acceptable figure. This amplifier will burn. The bandwidth is 3,6Hz to Could the root of this problem be an overheated transistor datqsheet soldering?

This point is made above, but is sufficiently important that repetition will not go astray.

IRFP9240 MOSFET. Datasheet pdf. Equivalent

These drivers Q7 and Q8 may need a heatsink. We will find each device’s needs individually. Reducing the gate resistors to 4.

You may also like: Don’t run any signal wire close to a power supply wire or the power transformer. Do the calc, and see for yourself.


It looks very simple, and includes the class AB driving stage to improve gate driving. Finding the correct design parameters becomes more complex with non-linear devices. Also note that this amp was built on a breadboard. It is definitely not insignificant for a linear circuit as shown in Figure 4and especially so because of the relatively high transconductance of vertical MOSFETs.

With 47 Kohm you get no sound, Q1 and Q2 remains closed. What is the purpose of the resistors R1 and R8 being variable? To illustrate this, Figure ratasheet shows the graph from the IRF data sheet, and although it does not continue down to the levels we are interested in, the trend is clearly visible. Use a current mirror with the LTP input to get as much gain as possible to dwtasheet for negative feedback, but do not solely rely on the feedback to make the amplifier better.

I have volt 3amp.

IRFP9240 – IRFP9240 P-Channel MOSFET Transistor

irrfp9240 The author Mitch Hodges and editor Rod Elliott grant the reader the right to use this information for personal use only, and further allow that one 1 copy may be made for reference. Once things are fine set current adjusting pot to minimum value switch on with new MOSFETS and with a dummy load of 25 ohms without speaker.

The lower impedance of the driver stage the better. F1 and F2 are safety fuses. Commercial use is prohibited without express written authorisation from Mitch Hodges and Rod Elliott.

Using HEXFETs in High Fidelity Audio

Previous post Next post. There’s little datasehet nothing in the datasheets to warn you, and many data sheets even show the SOA for DC. For some further reductions in distortion, the following work quite well: