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zbf106223512
Level 1
Level 1
Distributor - Weikeng(GC)
5 replies posted 25 sign-ins 10 questions asked

Dear Sir,

Could you help to check the max resistance value for Rpd,as the recommended value is 47k.

微信图片_20230717131141.png

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Anshika_G
Moderator
Moderator
Moderator
First question asked 50 likes received 250 replies posted

Hello,

Is there any specific value of resistance you are looking for?

47kohm as specified in the datasheet ensures the device to be able to differentiate between  Open load and Short circuit to Vs in OFF conditions. If the output voltage of a PROFET™ +24V becomes too high, drain-source voltage will be lower than VDS(OLOFF) , and the   PROFET™ +24 V will provide an open load signal IIS(OLOFF), if DEN = "high" while IN = "low".

 Pull up and pull down resistors values chosen should be such that the voltage appearing across VDS won't cross open load threshold VDS(OLOFF) for open load  detection.

Best Regards,
Anshika

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Anshika_G
Moderator
Moderator
Moderator
First question asked 50 likes received 250 replies posted

Hello,

Is there any specific value of resistance you are looking for?

47kohm as specified in the datasheet ensures the device to be able to differentiate between  Open load and Short circuit to Vs in OFF conditions. If the output voltage of a PROFET™ +24V becomes too high, drain-source voltage will be lower than VDS(OLOFF) , and the   PROFET™ +24 V will provide an open load signal IIS(OLOFF), if DEN = "high" while IN = "low".

 Pull up and pull down resistors values chosen should be such that the voltage appearing across VDS won't cross open load threshold VDS(OLOFF) for open load  detection.

Best Regards,
Anshika

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