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ADP7158ARDZ-3.0-R7 数据表(PDF) 20 Page - Analog Devices |
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ADP7158ARDZ-3.0-R7 数据表(HTML) 20 Page - Analog Devices |
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20 / 23 page ![]() Data Sheet ADP7158 Rev. A | Page 19 of 22 0 20 40 60 80 100 120 140 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 TOTAL POWER DISSIPATION (W) 6400mm2 500mm2 25mm2 TJ MAX Figure 57. Junction Temperature vs. Total Power Dissipation for the 8-Lead SOIC, TA = 25°C 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 TOTAL POWER DISSIPATION (W) 40 50 60 70 80 90 100 110 120 130 6400mm2 500mm2 25mm2 TJ MAX Figure 58. Junction Temperature vs. Total Power Dissipation for the 8-Lead SOIC, TA = 50°C 0 0.10.20.30.40.50.60.7 0.9 0.8 1.0 TOTAL POWER DISSIPATION (W) 80 85 90 95 100 105 110 115 120 125 130 6400mm2 500mm2 25mm2 TJ MAX Figure 59. Junction Temperature vs. Total Power Dissipation for the 8-Lead SOIC, TA = 85°C Thermal Characterization Parameter (ΨJB) When the evaluation board temperature is known, use the thermal characterization parameter, ΨJB, to estimate the junction temperature rise (see Figure 60 and Figure 61). Calculate the maximum junction temperature (TJ) from the evaluation board temperature (TB) and power dissipation (PD) using the following formula: TJ = TB + (PD × ΨJB) (5) The typical value of ΨJB is 29.1°C/W for the 10-lead LFCSP package and 30.1°C/W for the 8-lead SOIC package. 0 20 40 60 80 100 120 140 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 TOTAL POWER DISSIPATION (W) TB =25°C TB =50°C TB =65°C TB =85°C TJ MAX Figure 60. Junction Temperature vs. Total Power Dissipation for the 10-Lead LFCSP 0 20 40 60 80 100 120 140 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 TOTAL POWER DISSIPATION (W) TB =25°C TB =50°C TB =65°C TB =85°C TJ MAX Figure 61. Junction Temperature vs. Total Power Dissipation for the 8-Lead SOIC |
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