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TMP821DRG4 데이터시트(PDF) 7 Page - Texas Instruments |
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TMP821DRG4 데이터시트(HTML) 7 Page - Texas Instruments |
7 / 13 page www.ti.com Power Dissipation T – Temperature – °C A 0 25 50 75 100 0 0.2 0.4 0.6 0.8 1 TMP821 SLDS152 – JANUARY 2008 Figure 4 shows allowable power dissipation versus ambient temperature. Figure 4. Power Dissipation Total power consumption can be calculated as shown in Equation 1. Ptotal = PC1 + PC2 + PC3 (1) Where: PC1 = circuit power dissipation PC1 = VCC × ICC PC2 = output power dissipation PC2 = (VCC – VOH) × IO VOH = A1 and A2 high-level voltage PC2 can be reduced by increasing the external output transistor's hFE rank to reduce the IO consumption. PC3 = AL power dissipation PC3 = VAL_LOW × IAL Copyright © 2008, Texas Instruments Incorporated Submit Documentation Feedback 7 |
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