topic Re: MRFX600 LDMOS in Other NXP Products

MRFX600 LDMOS

J_SCOTT — Wed, 01 Sep 2021 01:39:23 GMT

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?

Re: MRFX600 LDMOS

andrei_skok — Wed, 01 Sep 2021 04:59:29 GMT

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.

MRFX1K80NR5 LDMOS - Idle current increasing with stable bias voltage.

na3m — Wed, 03 Nov 2021 17:31:27 GMT

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