SELECTION OF MOSFET FOR RF SEALING

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rnd
Level 1
Level 1
First reply posted First question asked Welcome!

hi,

can you please suggest me the best MOSFET from your side to amplify the RF signal power of frequency 40.68MHZ for the best use of sealing purpose.The output of such mosfet should be easily adjustable with load.

RIGHT NOW I AM USING TRANSISTOR MRF492, WHICH GIVING ME ONLY 50% EFFICIENCY.IT IS NOT BEST  FOR ME.

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1 Solution
Meghana
Moderator
Moderator
Moderator
50 likes received 100 solutions authored 10 likes given

Hello @rnd ,

Unfortunately, we do not have high power RF MOSFETs which can suit your requirements. We do have power MOSFETs which meets the power requirement, but they might not be efficient for 40.68MHz frequency due to higher parasitic capacitance values in comparison to RF MOSFETs. However, we would like to suggest the best available options in the our portfolio. 

Product BSZ063N04LS6 BSC059N04LS6 BSZ060NE2LS
Package PQFN 3.3 x 3.3 Fused Lead SuperSO8 5x6 PQFN 3.3 x 3.3
Infineon Package name PG-TSDSON-8 PG-TDSON-8 PG-TSDSON-8
VBRDSS max [V] 40 40 25
RDS (on) @10V max [mΩ] 6.3 5.9 6
QG typ @10V [nC] 9.5 9.4 9.1
VGS(th) [V] 1.78 1.78 1.6
ID  @25°C max [A] 40 59 40
Operating Temperature min [°C] -55 -55 -55
Operating Temperature max [°C] 175 175 150
Budgetary Price €/1k 0.32 0.36 0.21

 

Please check if any of these devices meet your efficiency expectation and choose accordingly. 

Regards

Meghana

 

 

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3 Replies
Meghana
Moderator
Moderator
Moderator
50 likes received 100 solutions authored 10 likes given

Hello @rnd ,

Can you please share the proposed schematic with us? We would like to analyze it and suggest an appropriate device. If you intend to operate the switch at 40.68MHz, then MOSFET might not be right choice. We can comment further after understanding your application.

Regards

Meghana

 

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rnd
Level 1
Level 1
First reply posted First question asked Welcome!
Hi, Thankyou for your response ,actually I want a calibration/tuning free circuit to boost the RF power ,so that I get good quality sealing on blood tubes without rupture the tube.
Frequency should not be more than 40.68mhz,power should be 70w-100w,
voltage-12-12.5 volt.
right now I am using MRF492/422 reference circuit for this purpose,but i am facing lot of power loss problem in it.also i have to spend much time on its sealing also.

Regards,
Karan Kumar
R&D Engg.
Mitra Industries Pvt. Ltd.
14/4, Mathura Road, Sector-31
Faridabad, Haryana- 121003
www.mitraindustries.com<>
0 Likes
Meghana
Moderator
Moderator
Moderator
50 likes received 100 solutions authored 10 likes given

Hello @rnd ,

Unfortunately, we do not have high power RF MOSFETs which can suit your requirements. We do have power MOSFETs which meets the power requirement, but they might not be efficient for 40.68MHz frequency due to higher parasitic capacitance values in comparison to RF MOSFETs. However, we would like to suggest the best available options in the our portfolio. 

Product BSZ063N04LS6 BSC059N04LS6 BSZ060NE2LS
Package PQFN 3.3 x 3.3 Fused Lead SuperSO8 5x6 PQFN 3.3 x 3.3
Infineon Package name PG-TSDSON-8 PG-TDSON-8 PG-TSDSON-8
VBRDSS max [V] 40 40 25
RDS (on) @10V max [mΩ] 6.3 5.9 6
QG typ @10V [nC] 9.5 9.4 9.1
VGS(th) [V] 1.78 1.78 1.6
ID  @25°C max [A] 40 59 40
Operating Temperature min [°C] -55 -55 -55
Operating Temperature max [°C] 175 175 150
Budgetary Price €/1k 0.32 0.36 0.21

 

Please check if any of these devices meet your efficiency expectation and choose accordingly. 

Regards

Meghana

 

 

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