more stuff
A couple things:
1. I have seen capacitors on the Baxandall diode and there may be more to it than I realized, ie it maintains the OPS frequency response when the diode is off. Whatever it is, a 100n cap on the diode is one way to clean up the burst of oscillation.
2. Does the way you biased the VAS cascode improve THD? I tried it the way I expected and it seems to work fine. That removes the bias divider current from R10 and R11, which changes the VAS current and the idle bias. So I had to re-adjust the idle bias.
3. The cross-over distortion seems to be partly because the positive drive is late and increasing C8 improves stability so I recommend moving most of C9 to C8. The symmetry of the schematic is a mute point for a quasi amp. Do whatever it takes to improve the symmetry of the results and don't worry about the optics of the schematic.
A couple things:
1. I have seen capacitors on the Baxandall diode and there may be more to it than I realized, ie it maintains the OPS frequency response when the diode is off. Whatever it is, a 100n cap on the diode is one way to clean up the burst of oscillation.
2. Does the way you biased the VAS cascode improve THD? I tried it the way I expected and it seems to work fine. That removes the bias divider current from R10 and R11, which changes the VAS current and the idle bias. So I had to re-adjust the idle bias.
3. The cross-over distortion seems to be partly because the positive drive is late and increasing C8 improves stability so I recommend moving most of C9 to C8. The symmetry of the schematic is a mute point for a quasi amp. Do whatever it takes to improve the symmetry of the results and don't worry about the optics of the schematic.
Thanks Steve! This 100nF cap did it!
At least in the sim. I remember using it in the previous quasi build (mentioned few posts ago), but even in the sim, it was making things worse.
Here it helps a lot.
Here is the latest version, with op-amp output oscillations gone. Will continue working on it..
Yes, Hawksford cascode improved Thd and FFT profile (more linear) a little bit,
and lowered power dissipation on VAS. Also, I can use devices with higher output capacitance for Q8/Q10 (TTA/TTC will do).
I think all the graphs and numbers look good now. Later will check square waves and clipping...
Also idle current now can be lower than before.
At least in the sim. I remember using it in the previous quasi build (mentioned few posts ago), but even in the sim, it was making things worse.
Here it helps a lot.
Here is the latest version, with op-amp output oscillations gone. Will continue working on it..
Yes, Hawksford cascode improved Thd and FFT profile (more linear) a little bit,
and lowered power dissipation on VAS. Also, I can use devices with higher output capacitance for Q8/Q10 (TTA/TTC will do).
I think all the graphs and numbers look good now. Later will check square waves and clipping...
Also idle current now can be lower than before.
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Right, but - see post #1380
I tend to never worry about thing like this (I know, my bad), because I have 2 (external) PSUs I'm using for my amps:
50V rails, and 80V rails.
So all my amps are designed for these two approx. voltages, regardless of their expected power 🙂
I don't mind lost voltage and less efficient amp. BUT - if we can't make it more efficient at low cost, and without sacrificing quality, why not.
======
Я стараюсь никогда не беспокоиться о таких вещах (я знаю, что у меня плохо), потому что у меня есть 2 (внешних) блока питания, которые я использую для своих усилителей: Рельсы 50V и рельсы 80V. Так что все мои усилители рассчитаны на эти два ок. напряжения, независимо от их ожидаемой мощности. Я не против потери напряжения и менее эффективного усилителя. НО - если мы не можем сделать его более эффективным при низких затратах и без ущерба для качества, почему бы и нет.
I tend to never worry about thing like this (I know, my bad), because I have 2 (external) PSUs I'm using for my amps:
50V rails, and 80V rails.
So all my amps are designed for these two approx. voltages, regardless of their expected power 🙂
I don't mind lost voltage and less efficient amp. BUT - if we can't make it more efficient at low cost, and without sacrificing quality, why not.
======
Я стараюсь никогда не беспокоиться о таких вещах (я знаю, что у меня плохо), потому что у меня есть 2 (внешних) блока питания, которые я использую для своих усилителей: Рельсы 50V и рельсы 80V. Так что все мои усилители рассчитаны на эти два ок. напряжения, независимо от их ожидаемой мощности. Я не против потери напряжения и менее эффективного усилителя. НО - если мы не можем сделать его более эффективным при низких затратах и без ущерба для качества, почему бы и нет.
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If there was some magical buck converter, or something else, that can boost DC voltage by 5V-10V, and don't pollute HF..
====
Если бы был какой-то волшебный понижающий преобразователь или что-то еще, которое может повысить постоянное напряжение на 5-10 В и не загрязнять ВЧ ...
====
Если бы был какой-то волшебный понижающий преобразователь или что-то еще, которое может повысить постоянное напряжение на 5-10 В и не загрязнять ВЧ ...
I was forced to learn RUS behind the iron curtain, I did it well, I must say your posts are well translated...
VAS boost voltage
You can get 5VDC from a cheap USB charger but it's probably noisy. A trick I have used is a ~6uF HV AC cap as a voltage drop to a rectifier/ shunt regulator. They did this in the Crown DC 300 in order to boost he driver voltage. Unlike a resistor or linear regulator, the cap does not get hot; waste a bunch of power.
You can get 5VDC from a cheap USB charger but it's probably noisy. A trick I have used is a ~6uF HV AC cap as a voltage drop to a rectifier/ shunt regulator. They did this in the Crown DC 300 in order to boost he driver voltage. Unlike a resistor or linear regulator, the cap does not get hot; waste a bunch of power.
Attachments
Somewhere I have a voltage doubler with a stabilizer to get a stable, higher voltage.I will search, I will find and send it to the forum
I found a scan of the measurement of intermodulation distortion of the circuit, close to the original Lomakin/Parshina. The level of distortion is quite modest .
Measurements made by Andrey Frolov
The photo of the board I showed earlier, at the beginning of the topic.
Measurements made by Andrey Frolov
The photo of the board I showed earlier, at the beginning of the topic.
Attachments
Last edited:
But this would have to be DC to DC up-converted, not AC to DC.
My external PSUs only delivers +/- 50V DC.
Most of DC2DC buck up-converters I see on the internet only work with lower voltage.. 50V boosted to 60V is usually too high..
My external PSUs only delivers +/- 50V DC.
Most of DC2DC buck up-converters I see on the internet only work with lower voltage.. 50V boosted to 60V is usually too high..
Last edited:
"LMK Max" from post #1320
https://www.diyaudio.com/forums/solid-state/357369-unusual-amp-1987-a-132.html#post6494405
almost done.
This is so far the best amp, as far as sim goes, in this thread.
Chassis will be (most likely) finished tomorrow. Time for music test coming..
We will see if theory/sim matches the real world 🙂
======
"ЛМК Макс" из поста №1320 почти готово.
Это пока что лучший усилитель по симу в этой ветке.
Шасси будет (скорее всего) закончено завтра. Приближается время музыкального теста .. Посмотрим, соответствует ли теория / симуляция реальному миру 🙂
https://www.diyaudio.com/forums/solid-state/357369-unusual-amp-1987-a-132.html#post6494405
almost done.
This is so far the best amp, as far as sim goes, in this thread.
Chassis will be (most likely) finished tomorrow. Time for music test coming..
We will see if theory/sim matches the real world 🙂
======
"ЛМК Макс" из поста №1320 почти готово.
Это пока что лучший усилитель по симу в этой ветке.
Шасси будет (скорее всего) закончено завтра. Приближается время музыкального теста .. Посмотрим, соответствует ли теория / симуляция реальному миру 🙂
Attachments
Last edited:
AS for the next build - the 250W, quasi HexFet amp - here is non-quasi (complementary) version with modern HexFets.
It's so much easier to make it stable, it produces better numbers, Thd/FFT.
Really not sure if I should bother with quasi version...
The only reason is the fact that I have a lot FDA69N30 devices... Since they don't
have P-Channel complementary device, I guess I can only use them for quasi amp... Same goes for IRFP260, which I also have plenty..
=======
Что касается следующей сборки - квази-HexFet-усилителя мощностью 250 Вт - это не квази (дополнительная) версия с современными HexFet-транзисторами. Намного проще сделать его стабильным, он дает лучшие числа Thd / FFT. На самом деле не уверен, стоит ли мне возиться с квази-версией ... Единственная причина в том, что у меня много устройств FDA69N30 ... Поскольку их нет есть дополнительное устройство P-Channel, я думаю, я могу использовать их только для квазиусилителя ... То же самое касается IRFP260, которого у меня тоже много ..
It's so much easier to make it stable, it produces better numbers, Thd/FFT.
Really not sure if I should bother with quasi version...
The only reason is the fact that I have a lot FDA69N30 devices... Since they don't
have P-Channel complementary device, I guess I can only use them for quasi amp... Same goes for IRFP260, which I also have plenty..
=======
Что касается следующей сборки - квази-HexFet-усилителя мощностью 250 Вт - это не квази (дополнительная) версия с современными HexFet-транзисторами. Намного проще сделать его стабильным, он дает лучшие числа Thd / FFT. На самом деле не уверен, стоит ли мне возиться с квази-версией ... Единственная причина в том, что у меня много устройств FDA69N30 ... Поскольку их нет есть дополнительное устройство P-Channel, я думаю, я могу использовать их только для квазиусилителя ... То же самое касается IRFP260, которого у меня тоже много ..
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Matching complimentary transistors is over rated. Consider
https://www.onsemi.com/pub/Collateral/FQA36P15-D.pdf
You will never go anywhere near 59Amps nor 300V in a linear application anyway. These two may not be a great match but N and P devices never are and probably a better match than you get from a quasi.
There was a DIYA post of a commercial quasi stereo where both bjt drivers are hung from about 6V above the output and the bias was servo regulated by monitoring the current. If I find it, I'll post a link.
I have played with similar and other ideas for a quasi including a folded cascode quasi that showed great promise. Especially wrt saturation which I know you don't care about.
https://www.onsemi.com/pub/Collateral/FQA36P15-D.pdf
You will never go anywhere near 59Amps nor 300V in a linear application anyway. These two may not be a great match but N and P devices never are and probably a better match than you get from a quasi.
There was a DIYA post of a commercial quasi stereo where both bjt drivers are hung from about 6V above the output and the bias was servo regulated by monitoring the current. If I find it, I'll post a link.
I have played with similar and other ideas for a quasi including a folded cascode quasi that showed great promise. Especially wrt saturation which I know you don't care about.
Last edited:
Yeah, I know complementary devices are never really matched, especially in case of vertical fets. FQA36P15 and IRFP9240 are the only powerful P-Channel fets available.. And FQA36P15 doesn't have a direct complementary match..
As for amps and volts - the sheet sugests a lot of amps, but the SOA is not that great. These FETs will never get anywhere close to 30 amps... (especially in linear app). Not to mentions cooling...
Elvee's Cirlophone was the amp with both N output devices (but not quasi!)..
I built it few years ago. Works great..
As for amps and volts - the sheet sugests a lot of amps, but the SOA is not that great. These FETs will never get anywhere close to 30 amps... (especially in linear app). Not to mentions cooling...
Elvee's Cirlophone was the amp with both N output devices (but not quasi!)..
I built it few years ago. Works great..
Minek,
There are plenty of high power pmos fets there. Try these
TO-263
IXTA26P20P
MOSFET P-CH 200V 26A TO263
$5.39000
IXTA26P20P-ND
PolarP™
Active P-Channel MOSFET (Metal Oxide) 200V 26A (Tc) 10V 170mOhm @ 13A, 10V 4V @ 250µA 56nC @ 10V ±20V 2740pF @ 25V - 300W (Tc) -55°C ~ 175°C (TJ) Surface Mount TO-263 (IXTA) TO-263-3, D²Pak (2 Leads + Tab), TO-263AB
TO-220
IXTP26P20P
MOSFET P-CH 200V 26A TO220AB
$5.54000
130 - Immediate
550 - Factory
IXYS IXYS
1
IXTP26P20P-ND
PolarP™
Tube
Active P-Channel MOSFET (Metal Oxide) 200V 26A (Tc) 10V 170mOhm @ 13A, 10V 4V @ 250µA 56nC @ 10V ±20V 2740pF @ 25V - 300W (Tc) -55°C ~ 175°C (TJ) Through Hole TO-220AB TO-220-3
TO-247-AD-EP-(H)
IXTH48P20P
MOSFET P-CH 200V 48A TO247
$9.29000
334 - Immediate
IXYS IXYS
1
IXTH48P20P-ND
PolarP™
Tube
Active P-Channel MOSFET (Metal Oxide) 200V 48A (Tc) 10V 85mOhm @ 500mA, 10V 4.5V @ 250µA 103nC @ 10V ±20V 5400pF @ 25V - 462W (Tc) -55°C ~ 150°C (TJ) Through Hole TO-247 (IXTH) TO-247-3
TO-263
IXTA32P20T
MOSFET P-CH 200V 32A TO263
$6.94000
150 - Immediate
IXYS IXYS
1
IXTA32P20T-ND
TrenchP™
Tube
Active P-Channel MOSFET (Metal Oxide) 200V 32A (Tc) 10V 130mOhm @ 16A, 10V 4V @ 250µA 185nC @ 10V ±15V 14500pF @ 25V - 300W (Tc) -55°C ~ 150°C (TJ) Surface Mount TO-263 (IXTA) TO-263-3, D²Pak (2 Leads + Tab), TO-263AB
TO-268
IXTT48P20P
MOSFET P-CH 200V 48A TO268
$10.09000
422 - Immediate
2,130 - Factory
IXYS IXYS
1
IXTT48P20P-ND
PolarP™
Tube
Active P-Channel MOSFET (Metal Oxide) 200V 48A (Tc) 10V 85mOhm @ 24A, 10V 4.5V @ 250µA 103nC @ 10V ±20V 5400pF @ 25V - 462W (Tc) -55°C ~ 150°C (TJ) Surface Mount TO-268 TO-268-3, D³Pak (2 Leads + Tab), TO-268AA
TO-220
IXTP32P20T
MOSFET P-CH 200V 32A TO220AB
$6.74000
294 - Immediate
IXYS IXYS
1
IXTP32P20T-ND
TrenchP™
Tube
Active P-Channel MOSFET (Metal Oxide) 200V 32A (Tc) 10V 130mOhm @ 16A, 10V 4V @ 250µA 185nC @ 10V ±15V 14500pF @ 25V - 300W (Tc) -55°C ~ 150°C (TJ) Through Hole TO-220AB TO-220-3
IXYS_TO-263
IXTA26P20P-TRL
MOSFET P-CH 200V 26A TO263
$5.20000
695 - Immediate
IXYS IXYS
1
238-IXTA26P20P-TRLTR-ND
238-IXTA26P20P-TRLCT-ND
238-IXTA26P20P-TRLDKR-ND
TrenchP™
Tape & Reel (TR)
Cut Tape (CT)
Digi-Reel®
Active P-Channel MOSFET (Metal Oxide) 200V 26A (Tc) 10V 170mOhm @ 13A, 10V 4V @ 250µA 56nC @ 10V ±20V 2740pF @ 25V - 300W (Tc) -55°C ~ 150°C (TJ) Surface Mount TO-263 (IXTA) TO-263-3, D²Pak (2 Leads + Tab), TO-263AB
TO-247-AD-EP-(H)
IXTH24P20
MOSFET P-CH 200V 24A TO247
$8.59000
0 - Immediate
IXYS IXYS
1
IXTH24P20-ND
-
Tube
Active P-Channel MOSFET (Metal Oxide) 200V 24A (Tc) 10V 150mOhm @ 500mA, 10V 5V @ 250µA 150nC @ 10V ±20V 4200pF @ 25V - 300W (Tc) -55°C ~ 150°C (TJ) Through Hole TO-247 (IXTH) TO-247-3
TO-247-AD-EP-(H)
IXTH26P20P
MOSFET P-CH 200V 26A TO247
$6.40000
0 - Immediate
IXYS IXYS
1
IXTH26P20P-ND
PolarP™
Tube
Active P-Channel MOSFET (Metal Oxide) 200V 26A (Tc) 10V 170mOhm @ 13A, 10V 4V @ 250µA 56nC @ 10V ±20V 2740pF @ 25V - 300W (Tc) -55°C ~ 175°C (TJ) Through Hole TO-247 (IXTH) TO-247-3
ISOPLUS247 Pkg
IXTR48P20P
MOSFET P-CH 200V 30A ISOPLUS247
$11.05000
15 - Immediate
1,140 - Factory
IXYS IXYS
1
IXTR48P20P-ND
PolarP™
Tube
Active P-Channel MOSFET (Metal Oxide) 200V 30A (Tc) 10V 93mOhm @ 24A, 10V 4.5V @ 250µA 103nC @ 10V ±20V 5400pF @ 25V - 190W (Tc) -55°C ~ 150°C (TJ) Through Hole ISOPLUS247™ ISOPLUS247™
TO-3P
IXTQ26P20P
MOSFET P-CH 200V 26A TO3P
$3.65807
0 - Immediate
480 - Factory
IXYS IXYS
300
Non-Stock
IXTQ26P20P-ND
PolarP™
Tube
Active P-Channel MOSFET (Metal Oxide) 200V 26A (Tc) 10V 170mOhm @ 13A, 10V 4V @ 250µA 56nC @ 10V ±20V 2740pF @ 25V - 300W (Tc) -55°C ~ 175°C (TJ) Through Hole TO-3P TO-3P-3, SC-65-3
TO-263-3, D²Pak (2 Leads + Tab), TO-263AB
IXTA32P20T-TRL
MOSFET P-CH 200V 32A TO263
$4.18913
0 - Immediate
IXYS IXYS
800
Non-Stock
238-IXTA32P20T-TRLTR-ND
-
Tape & Reel (TR)
Active P-Channel MOSFET (Metal Oxide) 200V 32A (Tc) 10V 130mOhm @ 16A, 10V 4V @ 250µA 185nC @ 10V ±15V 14500pF @ 25V - 300W (Tc) -55°C ~ 150°C (TJ) Surface Mount TO-263 (IXTA) TO-263-3, D²Pak (2 Leads + Tab), TO-263AB
MOSFET P-CH 200V 32A TO3P
IXTQ32P20T
MOSFET P-CH 200V 32A TO3P
$4.22933
0 - Immediate
IXYS IXYS
30
Non-Stock
238-IXTQ32P20T-ND
-
Tube
Active P-Channel MOSFET (Metal Oxide) 200V 32A (Tc) 10V 130mOhm @ 16A, 10V 4V @ 250µA 185nC @ 10V ±15V 14500pF @ 25V - 300W (Tc) -55°C ~ 150°C (TJ) Through Hole TO-3P TO-3P-3, SC-65-3
TO-247-AD-EP-(H)
IXTH32P20T
MOSFET P-CH 200V 32A TO247
$5.08800
0 - Immediate
840 - Factory
IXYS IXYS
300
Non-Stock
IXTH32P20T-ND
TrenchP™
Tube
Active P-Channel MOSFET (Metal Oxide) 200V 32A (Tc) 10V 130mOhm @ 16A, 10V 4V @ 250µA 185nC @ 10V ±15V 14500pF @ 25V - 300W (Tc) -55°C ~ 150°C (TJ) Through Hole TO-247 (IXTH) TO-247-3
TO-268
IXTT24P20
MOSFET P-CH 200V 24A TO268
$6.12257
0 - Immediate
2,400 - Factory
IXYS IXYS
300
Non-Stock
IXTT24P20-ND
-
Tube
Active P-Channel MOSFET (Metal Oxide) 200V 24A (Tc) 10V 110mOhm @ 500mA, 10V 5V @ 250µA 150nC @ 10V ±20V 4200pF @ 25V - 300W (Tc) -55°C ~ 150°C (TJ) Surface Mount TO-268 TO-268-3, D³Pak (2 Leads + Tab), TO-268AA
Compare
The issue is high Ciss, but most are gm >10 and the selection is 200-400, all pmos, and 20-40A continuous.
HD
There are plenty of high power pmos fets there. Try these
TO-263
IXTA26P20P
MOSFET P-CH 200V 26A TO263
$5.39000
IXTA26P20P-ND
PolarP™
Active P-Channel MOSFET (Metal Oxide) 200V 26A (Tc) 10V 170mOhm @ 13A, 10V 4V @ 250µA 56nC @ 10V ±20V 2740pF @ 25V - 300W (Tc) -55°C ~ 175°C (TJ) Surface Mount TO-263 (IXTA) TO-263-3, D²Pak (2 Leads + Tab), TO-263AB
TO-220
IXTP26P20P
MOSFET P-CH 200V 26A TO220AB
$5.54000
130 - Immediate
550 - Factory
IXYS IXYS
1
IXTP26P20P-ND
PolarP™
Tube
Active P-Channel MOSFET (Metal Oxide) 200V 26A (Tc) 10V 170mOhm @ 13A, 10V 4V @ 250µA 56nC @ 10V ±20V 2740pF @ 25V - 300W (Tc) -55°C ~ 175°C (TJ) Through Hole TO-220AB TO-220-3
TO-247-AD-EP-(H)
IXTH48P20P
MOSFET P-CH 200V 48A TO247
$9.29000
334 - Immediate
IXYS IXYS
1
IXTH48P20P-ND
PolarP™
Tube
Active P-Channel MOSFET (Metal Oxide) 200V 48A (Tc) 10V 85mOhm @ 500mA, 10V 4.5V @ 250µA 103nC @ 10V ±20V 5400pF @ 25V - 462W (Tc) -55°C ~ 150°C (TJ) Through Hole TO-247 (IXTH) TO-247-3
TO-263
IXTA32P20T
MOSFET P-CH 200V 32A TO263
$6.94000
150 - Immediate
IXYS IXYS
1
IXTA32P20T-ND
TrenchP™
Tube
Active P-Channel MOSFET (Metal Oxide) 200V 32A (Tc) 10V 130mOhm @ 16A, 10V 4V @ 250µA 185nC @ 10V ±15V 14500pF @ 25V - 300W (Tc) -55°C ~ 150°C (TJ) Surface Mount TO-263 (IXTA) TO-263-3, D²Pak (2 Leads + Tab), TO-263AB
TO-268
IXTT48P20P
MOSFET P-CH 200V 48A TO268
$10.09000
422 - Immediate
2,130 - Factory
IXYS IXYS
1
IXTT48P20P-ND
PolarP™
Tube
Active P-Channel MOSFET (Metal Oxide) 200V 48A (Tc) 10V 85mOhm @ 24A, 10V 4.5V @ 250µA 103nC @ 10V ±20V 5400pF @ 25V - 462W (Tc) -55°C ~ 150°C (TJ) Surface Mount TO-268 TO-268-3, D³Pak (2 Leads + Tab), TO-268AA
TO-220
IXTP32P20T
MOSFET P-CH 200V 32A TO220AB
$6.74000
294 - Immediate
IXYS IXYS
1
IXTP32P20T-ND
TrenchP™
Tube
Active P-Channel MOSFET (Metal Oxide) 200V 32A (Tc) 10V 130mOhm @ 16A, 10V 4V @ 250µA 185nC @ 10V ±15V 14500pF @ 25V - 300W (Tc) -55°C ~ 150°C (TJ) Through Hole TO-220AB TO-220-3
IXYS_TO-263
IXTA26P20P-TRL
MOSFET P-CH 200V 26A TO263
$5.20000
695 - Immediate
IXYS IXYS
1
238-IXTA26P20P-TRLTR-ND
238-IXTA26P20P-TRLCT-ND
238-IXTA26P20P-TRLDKR-ND
TrenchP™
Tape & Reel (TR)
Cut Tape (CT)
Digi-Reel®
Active P-Channel MOSFET (Metal Oxide) 200V 26A (Tc) 10V 170mOhm @ 13A, 10V 4V @ 250µA 56nC @ 10V ±20V 2740pF @ 25V - 300W (Tc) -55°C ~ 150°C (TJ) Surface Mount TO-263 (IXTA) TO-263-3, D²Pak (2 Leads + Tab), TO-263AB
TO-247-AD-EP-(H)
IXTH24P20
MOSFET P-CH 200V 24A TO247
$8.59000
0 - Immediate
IXYS IXYS
1
IXTH24P20-ND
-
Tube
Active P-Channel MOSFET (Metal Oxide) 200V 24A (Tc) 10V 150mOhm @ 500mA, 10V 5V @ 250µA 150nC @ 10V ±20V 4200pF @ 25V - 300W (Tc) -55°C ~ 150°C (TJ) Through Hole TO-247 (IXTH) TO-247-3
TO-247-AD-EP-(H)
IXTH26P20P
MOSFET P-CH 200V 26A TO247
$6.40000
0 - Immediate
IXYS IXYS
1
IXTH26P20P-ND
PolarP™
Tube
Active P-Channel MOSFET (Metal Oxide) 200V 26A (Tc) 10V 170mOhm @ 13A, 10V 4V @ 250µA 56nC @ 10V ±20V 2740pF @ 25V - 300W (Tc) -55°C ~ 175°C (TJ) Through Hole TO-247 (IXTH) TO-247-3
ISOPLUS247 Pkg
IXTR48P20P
MOSFET P-CH 200V 30A ISOPLUS247
$11.05000
15 - Immediate
1,140 - Factory
IXYS IXYS
1
IXTR48P20P-ND
PolarP™
Tube
Active P-Channel MOSFET (Metal Oxide) 200V 30A (Tc) 10V 93mOhm @ 24A, 10V 4.5V @ 250µA 103nC @ 10V ±20V 5400pF @ 25V - 190W (Tc) -55°C ~ 150°C (TJ) Through Hole ISOPLUS247™ ISOPLUS247™
TO-3P
IXTQ26P20P
MOSFET P-CH 200V 26A TO3P
$3.65807
0 - Immediate
480 - Factory
IXYS IXYS
300
Non-Stock
IXTQ26P20P-ND
PolarP™
Tube
Active P-Channel MOSFET (Metal Oxide) 200V 26A (Tc) 10V 170mOhm @ 13A, 10V 4V @ 250µA 56nC @ 10V ±20V 2740pF @ 25V - 300W (Tc) -55°C ~ 175°C (TJ) Through Hole TO-3P TO-3P-3, SC-65-3
TO-263-3, D²Pak (2 Leads + Tab), TO-263AB
IXTA32P20T-TRL
MOSFET P-CH 200V 32A TO263
$4.18913
0 - Immediate
IXYS IXYS
800
Non-Stock
238-IXTA32P20T-TRLTR-ND
-
Tape & Reel (TR)
Active P-Channel MOSFET (Metal Oxide) 200V 32A (Tc) 10V 130mOhm @ 16A, 10V 4V @ 250µA 185nC @ 10V ±15V 14500pF @ 25V - 300W (Tc) -55°C ~ 150°C (TJ) Surface Mount TO-263 (IXTA) TO-263-3, D²Pak (2 Leads + Tab), TO-263AB
MOSFET P-CH 200V 32A TO3P
IXTQ32P20T
MOSFET P-CH 200V 32A TO3P
$4.22933
0 - Immediate
IXYS IXYS
30
Non-Stock
238-IXTQ32P20T-ND
-
Tube
Active P-Channel MOSFET (Metal Oxide) 200V 32A (Tc) 10V 130mOhm @ 16A, 10V 4V @ 250µA 185nC @ 10V ±15V 14500pF @ 25V - 300W (Tc) -55°C ~ 150°C (TJ) Through Hole TO-3P TO-3P-3, SC-65-3
TO-247-AD-EP-(H)
IXTH32P20T
MOSFET P-CH 200V 32A TO247
$5.08800
0 - Immediate
840 - Factory
IXYS IXYS
300
Non-Stock
IXTH32P20T-ND
TrenchP™
Tube
Active P-Channel MOSFET (Metal Oxide) 200V 32A (Tc) 10V 130mOhm @ 16A, 10V 4V @ 250µA 185nC @ 10V ±15V 14500pF @ 25V - 300W (Tc) -55°C ~ 150°C (TJ) Through Hole TO-247 (IXTH) TO-247-3
TO-268
IXTT24P20
MOSFET P-CH 200V 24A TO268
$6.12257
0 - Immediate
2,400 - Factory
IXYS IXYS
300
Non-Stock
IXTT24P20-ND
-
Tube
Active P-Channel MOSFET (Metal Oxide) 200V 24A (Tc) 10V 110mOhm @ 500mA, 10V 5V @ 250µA 150nC @ 10V ±20V 4200pF @ 25V - 300W (Tc) -55°C ~ 150°C (TJ) Surface Mount TO-268 TO-268-3, D³Pak (2 Leads + Tab), TO-268AA
Compare
The issue is high Ciss, but most are gm >10 and the selection is 200-400, all pmos, and 20-40A continuous.
HD