ME Lin Transceiver MCP2021
Posted: 24 Nov 2011 11:08
Hi folks,
I am currently using a set of ME Lin boards, an LV18Fv6 with a P18F67J60 and a couple of P16F887 Ready for pic boards to create a Lin network. All the boards are connected to LIN transceiver boards via RC2,RC3, RC6 and RC7. The Lin Master is the LV18Fv6 board.
As the MCP201 parts are going obsolete I replaced the MCP201s on a couple of the boards with MCP2021s however I am having trouble with unstable Vreg and the transceivers get VERY hot. Communication with the hot nodes still seems to work fine.
To adapt the boards I simply replaced the MCP201s with MCP2021-500s and removed the slope selection jumper, I can't see any further hardware modifications that are required. I am running the Lin bus at approximately 12V.
I have found that if I swap the boards around so that an MCP2021 is the master, the master MCP2021 will not get hot.
Does anyone have any idea where I may be going wrong?
Do the MCP2021 pieces naturally run very hot?
If anyone can offer any advice or would like to know more I look forward to hearing from you.
Cheers,
M
I am currently using a set of ME Lin boards, an LV18Fv6 with a P18F67J60 and a couple of P16F887 Ready for pic boards to create a Lin network. All the boards are connected to LIN transceiver boards via RC2,RC3, RC6 and RC7. The Lin Master is the LV18Fv6 board.
As the MCP201 parts are going obsolete I replaced the MCP201s on a couple of the boards with MCP2021s however I am having trouble with unstable Vreg and the transceivers get VERY hot. Communication with the hot nodes still seems to work fine.
To adapt the boards I simply replaced the MCP201s with MCP2021-500s and removed the slope selection jumper, I can't see any further hardware modifications that are required. I am running the Lin bus at approximately 12V.
I have found that if I swap the boards around so that an MCP2021 is the master, the master MCP2021 will not get hot.
Does anyone have any idea where I may be going wrong?
Do the MCP2021 pieces naturally run very hot?
If anyone can offer any advice or would like to know more I look forward to hearing from you.
Cheers,
M