AN 74: アルテラ・デバイスの消費電力評価方法
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1 AN 74: Evaluating Power for Altera Devices ver.2 Application Note 74 P EST = P INT + P IO P INT = I CCINT V CCINT P IO = P ACOUT + P DCOUT P EST = (I CCINT V CCINT ) + (P ACOUT + P DCOUT ) Altera Corporation Page 1 A-AN /J
2 / P DC = OUT d n= 1 P DCn d P DCn P DCn (mw) P ACOUT P = C V f V OUT AC a n n n n= 1 CCIO a C n V n f n Page 2 Altera Corporation
3 f MAX tog IO f n = (0.5) f MAX tog IO P ACOUT P ACOUT = (0.5) OUT C AVE V O f MAX tog IO V CCIO V CCIO V O V CCIO (V) V O (V) P ACOUT = (0.5) OUT C AVE 3.8 V f MAX tog IO 5.0 V P MAX TJ T = θ JA A P MAX TJ T = θ JC C Altera Corporation Page 3
4 θ θ θ θ θ θ θ Page 4 Altera Corporation
5 / I CC0 I CC0 = ma K = µa/(mhz LE) f MAX f MAX = MHz LE N N = LE tog LC tog LC = I CCINT I CCINT = ma I CCINT =I CC0 + K f MAX N tog LC P INT P INT = mw P INT = V CC I CCINT MC TON MC DEV MC USED f MAX tog LC I CCINT I CCINT = (A MC TON ) + [B (MC DEV MC TON )] + (C MC USED f MAX tog LC ) P INT P INT =V CC I CCINT A = ma/le B = ma/le C = ma/(mhz LE) MC TON = LE MC DEV = LE MC USED = LE f MAX = MHz tog LC = I CCINT = ma P INT = mw P DCOUT P DCOUT = P DCn C AVE OUT tog IO P ACOUT P ACOUT = 1/2 OUT C AVE V O f MAX tog IO V CCIO P IO P DCOUT = mw C AVE = pf OUT = tog IO = P ACOUT = mw P IO = mw P IO = P DCOUT + P ACOUT Altera Corporation Page 5
6 / P EST P EST = P INT + P IO P EST = mw T J T A P MAX P MAX = (T J T A )/θ JA θ JA = C/W T J = C T A = C P MAX = W P EST < P MAX Yes or No f MAX Page 6 Altera Corporation
7 MAX 9000 f MAX Altera Corporation Page 7
8 FLEX 10K / dsp_fir.tdf EPF10K50VBC356-2 I CC0 I CC0 = ma K= 45 µa/(mhz LE f MAX f MAX = 50 MHz N N= 2,747 LE tog LC tog LC = I CCINT I CCINT = ma I CCINT = I CC0 + K f MAX N tog LC P INT P INT = 2,551.2 mw P INT = V CC I CCINT P DCOUT P DCOUT = 24.5 mw P DCOUT = P DCn C AVE C AVE = 35 pf OUT OUT = 150 tog IO tog IO = P ACOUT P ACOUT = mw P ACOUT = 1/2 OUT C AVE 3.3 V f MAX tog IO 3.3 V P IO P IO = mw P IO = P DCOUT + P ACOUT P EST P EST = 2, mw P EST = P INT + P IO Page 8 Altera Corporation
9 FLEX 10K / θ JA = 8 C/W T J = 85 C T J T A T A = 40 C P MAX P MAX = W P MAX = (T J T A )/θ JA P EST < P MAX Yes or No Altera Corporation Page 9
10 MAX 9000 / atm_pkt.tdf EPM9560RC A= 0.68 ma/le B= 0.26 ma/le C= ma/(mhz LE) MC TON MC TON = 139 LE MC DEV MC DEV = 560 LE MC USED MC USED = 500 LE f MAX f MAX = 40 MHz tog LC tog LC = I CCINT I CCINT = ma I CCINT = (A MC TON ) + [B (MC DEV MC TON )] + (C MC USED f MAX tog LC ) P INT P INT = 1,669.9 mw P INT = V CC I CCINT P DCOUT P DCOUT = 50 mw P DCOUT = P DCn C AVE C AVE = 35 pf OUT OUT = 211 tog IO tog IO = P ACOUT P ACOUT = mw P ACOUT = 1/2 OUT C AVE 3.8 V f MAX tog IO 5 V P IO P IO = mw P IO = P DCOUT + P ACOUT P EST P EST = 2, mw P EST = P INT + P IO θ JA = 8 C/W T J = 90 C T J T A T A = 70 C P MAX P MAX = 2.5 W P MAX = (T J T A )/θ JA Page 10 Altera Corporation
![98 ma I CCINT = (A MC TON ) + [B (MC DEV MC TON )] + (C MC USED f MAX tog LC ) P INT P INT = 1,669.](/docs-images/41/22730718/images/page_10.jpg "9 mw P INT = V CC I CCINT P DCOUT P DCOUT = 50 mw P DCOUT = P DCn C AVE C AVE = 35 pf OUT OUT = 211 tog IO tog IO = 0.125 P ACOUT P ACOUT = 350.79 mw P ACOUT = 1/2 OUT C AVE 3.")
11 MAX 9000 / P EST < P MAX Yes or No / / Altera Corporation Page 11
12 AItera Corporation 101 Innovation Drive, San Jose, CA TEL : (408) Page 12 Altera Corporation //
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