about HIP4081,need help

handsomeuu · 12th June 2010, 05:49 AM

I got a demo board of NuForce Amplifier a couple of days ago and i found that the resistance connect to the pin HDEL ,which belongs to HIP4081, had a value of 200 Ohm . But according to the datasheet, it is supposed to has a value between 10K Ohm to 200K Ohm. I don't know why, i need some help.
P.S The demo board is working in a good condition.

gfiandy · 14th June 2010, 09:12 PM

This pin is controlled by the current from it to ground. If the 200R is connected to another circuit that controls the current, this could explain why the value is so low.

If it is working I would not change it unless you have determined exactly what is going on and understand what you are doing. The resistor controls the comutation delay and if you mess it up you are likely to damage the chip.

Regards,
Andrew

handsomeuu · 21st June 2010, 02:22 AM

Quote:

Originally Posted by gfiandy

this pin is controlled by the current from it to ground. If the 200r is connected to another circuit that controls the current, this could explain why the value is so low.

If it is working i would not change it unless you have determined exactly what is going on and understand what you are doing. The resistor controls the comutation delay and if you mess it up you are likely to damage the chip.

Regards,
andrew

thx

12th June 2010, 05:49 AM	#1
handsomeuu diyAudio Member Join Date: Jun 2010	about HIP4081,need help I got a demo board of NuForce Amplifier a couple of days ago and i found that the resistance connect to the pin HDEL ,which belongs to HIP4081, had a value of 200 Ohm . But according to the datasheet, it is supposed to has a value between 10K Ohm to 200K Ohm. I don't know why, i need some help. P.S The demo board is working in a good condition.

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14th June 2010, 09:12 PM	#2
gfiandy Audio Engineer diyAudio Member Join Date: Jul 2003 Location: Cambridge UK	This pin is controlled by the current from it to ground. If the 200R is connected to another circuit that controls the current, this could explain why the value is so low. If it is working I would not change it unless you have determined exactly what is going on and understand what you are doing. The resistor controls the comutation delay and if you mess it up you are likely to damage the chip. Regards, Andrew

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