Aug 17, 2007 #1 B Bjarredsbon Newbie level 2 Joined Aug 17, 2007 Messages 2 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,295 If someone knows how to estimate/calculate the power dissapation as a function of the chip temperature, please send a reply or an email. Thank you.
If someone knows how to estimate/calculate the power dissapation as a function of the chip temperature, please send a reply or an email. Thank you.
Aug 17, 2007 #2 P phutanesv Full Member level 2 Joined Apr 26, 2007 Messages 149 Helped 19 Reputation 38 Reaction score 7 Trophy points 1,298 Activity points 2,221 Re: Power vs Temperature Dear Dude, Normally power analaysis will be done for power. actually what is ur question in could not get properly. r u saying about dynamic power or vdd or vss. which power r u taking about. phutane
Re: Power vs Temperature Dear Dude, Normally power analaysis will be done for power. actually what is ur question in could not get properly. r u saying about dynamic power or vdd or vss. which power r u taking about. phutane
Aug 17, 2007 #3 B Bjarredsbon Newbie level 2 Joined Aug 17, 2007 Messages 2 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,295 Re: Power vs Temperature If the chip was a true resistor, the power would decrease as the resistance increases with temperature (P=U*I, I=U/R, P=U*U/R) But transistors are more complex beasts, with many parameters changing with temperature (I suppose). Previsouly I have used a rule of thumb, 10% more power when going from 90C to 125C, but I am no longer sure this is true. Any facts? Thanks.
Re: Power vs Temperature If the chip was a true resistor, the power would decrease as the resistance increases with temperature (P=U*I, I=U/R, P=U*U/R) But transistors are more complex beasts, with many parameters changing with temperature (I suppose). Previsouly I have used a rule of thumb, 10% more power when going from 90C to 125C, but I am no longer sure this is true. Any facts? Thanks.
Aug 18, 2007 #4 P phutanesv Full Member level 2 Joined Apr 26, 2007 Messages 149 Helped 19 Reputation 38 Reaction score 7 Trophy points 1,298 Activity points 2,221 Re: Power vs Temperature Dear Bjarredsbon Temperture affects many parameter like mobility decreases, β decreases due to this Current Ids decreases salso there will be small change in Vt, which depends on substrate doping a variation of -3degreev/centigrade will be there. means for a 80 degree rise in temperature there will 30% decrease in transistor gain and a drop about 240mV in Vt. one more speed also decreases. phutane
Re: Power vs Temperature Dear Bjarredsbon Temperture affects many parameter like mobility decreases, β decreases due to this Current Ids decreases salso there will be small change in Vt, which depends on substrate doping a variation of -3degreev/centigrade will be there. means for a 80 degree rise in temperature there will 30% decrease in transistor gain and a drop about 240mV in Vt. one more speed also decreases. phutane
Aug 23, 2007 #5 U ubna Advanced Member level 4 Joined Jul 25, 2007 Messages 112 Helped 14 Reputation 28 Reaction score 5 Trophy points 1,298 Location India Activity points 1,819 Re: Power vs Temperature The temperature of a chip depends upon the power dissipated per unit area of the chip....
Re: Power vs Temperature The temperature of a chip depends upon the power dissipated per unit area of the chip....