MRFX600 LDMOS

[J_SCOTT]

Air-ceramic packaging of this 65V technology RF LDMOS was released in 2018.  My understanding is that generally 6 months later the corresponding molded over plastic case configuration is released.  What happened to the plastic case version of MRFX600HR5?

[na3m]

Hello,

I am trying to replace MRF1K50H with MRFX1K80NR5 and having strange problem. I cannot set idle current at 1A level. I slowly increase bias voltage and when idle current is around 0.8A it starts growing by itself rapidly and can reach very high values. I turn off power to transistor to prevent it from damage.

What could be causing this? 

I know that MRFX1K80NR5 does not have flanges so I carefully attached transistor to copper plate with water cooling (using Liquid Ultra as thermal paste) to make sure it will have adequate cooling. Is there something else I am missing?

Thank you,

Nick NA3M

[andrei_skok]

The MRFX600HR5 device https://www.nxp.com/part/MRFX600H#/ is only available in the CFM4F ceramic package https://www.nxp.com/docs/en/package-information/98ASA10793D.pdf. This device is not available in a plastic package.