Hello,
I'm looking for some medium power lateral MOSFETs in TO220 or D2PAK format. They need to be able to dissipate about 5W. Actually, I'm interested in the temperature coefficient and simple biasing, mostly.
So far, I'm not having any luck. Are those really not manufactured anymore anywhere ?
Thanks 😉
I'm looking for some medium power lateral MOSFETs in TO220 or D2PAK format. They need to be able to dissipate about 5W. Actually, I'm interested in the temperature coefficient and simple biasing, mostly.
So far, I'm not having any luck. Are those really not manufactured anymore anywhere ?
Thanks 😉
my understanding is the old hitachi/renesas TO-220 laterals have been discontinued for several years. you may be able to find NOS somewhere, but the risk of fakes is VERY high these days.
mlloyd1
mlloyd1
2sk216 and 2sj79 :
Pacific Semiconductors USA - Worldwide Distributor-Import-Export
sorta pricy , but those are unique devices ......
Pacific Semiconductors USA - Worldwide Distributor-Import-Export
sorta pricy , but those are unique devices ......
They're available on Taobao, get the ones which are pulled out of equipment, they go for around $1 each.
https://item.taobao.com/item.htm?sp...842&pvid=8b7d34f2-667d-4cdf-b590-714ec88d6259
https://item.taobao.com/item.htm?sp...842&pvid=8b7d34f2-667d-4cdf-b590-714ec88d6259
Yeah - if only we could have green SOT-23s for the PNPs and P-channels, would make troubleshooting much easier!
Depending on your circuit ... and room ....
The TO47 (big plastic) sk1058 et al ....
are common ............
The TO47 (big plastic) sk1058 et al ....
are common ............
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I've noticed the Supertex depletion MOSFETs have a positive tempco, too.
However, parts availability on those NOS laterals seems to point in the direction of using standard vertical MOS... Thanks for all the advice anyway !
However, parts availability on those NOS laterals seems to point in the direction of using standard vertical MOS... Thanks for all the advice anyway !
Sorry to be so late, but maybe the info will still be useful.
The old Hitachi-style lateral FETs do still live on, manufactured by SEMELAB for their ALFET series of Audio Lateral Power FETs.
Most importantly, they retain the zero-TC (stable idle current) at around 100-120mA.
Data:
http://products.semelab-tt.com/pdf/magnatec/ALF08N16V ALF08N20V.pdf
N-channel purchase:
ALF08N20V | Semelab ALF08N20V N-channel MOSFET, 8 A, 160 V, 3-Pin TO-247 | Semelab
And even a P-ch part!
ALF16P16W | Semelab ALF16P16W P-channel MOSFET, 16 A, 160 V, 3-Pin TO-264 | Semelab
The old Hitachi-style lateral FETs do still live on, manufactured by SEMELAB for their ALFET series of Audio Lateral Power FETs.
Most importantly, they retain the zero-TC (stable idle current) at around 100-120mA.
Data:
http://products.semelab-tt.com/pdf/magnatec/ALF08N16V ALF08N20V.pdf
N-channel purchase:
ALF08N20V | Semelab ALF08N20V N-channel MOSFET, 8 A, 160 V, 3-Pin TO-247 | Semelab
And even a P-ch part!
ALF16P16W | Semelab ALF16P16W P-channel MOSFET, 16 A, 160 V, 3-Pin TO-264 | Semelab
Thanks!
Yes, I know about these big ones, actually I bought a pair to play with... didn't have time to, though.
I was more specifically interested in faster MOSFETs, which is why I was looking into the smaller ones.
However, at the current I want to use (about 20mA) these TO220 laterals (J77 K214) have quite low transconductance (50mS) which means I can get roughly the same performance using an IRF610 with a source resistor... and with this high value of a source resistor, thermal stability is pretty much guaranteed.
Yes, I know about these big ones, actually I bought a pair to play with... didn't have time to, though.
I was more specifically interested in faster MOSFETs, which is why I was looking into the smaller ones.
However, at the current I want to use (about 20mA) these TO220 laterals (J77 K214) have quite low transconductance (50mS) which means I can get roughly the same performance using an IRF610 with a source resistor... and with this high value of a source resistor, thermal stability is pretty much guaranteed.
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> and with this high value of a source resistor, thermal stability is pretty much guaranteed
Do you have a formula for resistance needed for thermal stability ?
Do you have a formula for resistance needed for thermal stability ?
The laterals all have low YFS for the corresponding capacitances / gate charge.
The Hitachi designs are on their 40th birthday, so we will not ask too much!
The Hitachi designs are on their 40th birthday, so we will not ask too much!
If you can deal with N channel only, the DN2540 or DN2530 isn't too bad. It's a depletion device, but its transconductance drops with temperature. The |Vgs(off)| rises with temperature (harder to turn off), but there should be a balance somewhere usable.
I only ever used it with a moderate source resistor (300 ohms, device running at about 10mA, self-bias, ultra-stable), though, so it was never an issue. Linearity, if you can get around the nonlinear drain-gate capacitance (cascode or drive from a low impedance) is actually quite good.
I only ever used it with a moderate source resistor (300 ohms, device running at about 10mA, self-bias, ultra-stable), though, so it was never an issue. Linearity, if you can get around the nonlinear drain-gate capacitance (cascode or drive from a low impedance) is actually quite good.
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