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Motore di ricerca datesheet componenti elettronici |
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Motore di ricerca datesheet componenti elettronici |
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STM32G081EB Scheda tecnica(PDF) 132 Page - STMicroelectronics |
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STM32G081EB Scheda tecnica(HTML) 132 Page - STMicroelectronics |
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132 / 136 page  STM32G081xB 132/136 DS12231 Rev 4 The following example shows how to calculate the temperature range needed for a given application. Example: Assuming the following worst application conditions: • ambient temperature TA = 50 °C (measured according to JESD51-2) • IDD = 50 mA; VDD = 3.6 V • 20 I/Os simultaneously used as output at low level with IOL = 8 mA (VOL= 0.4 V), and • 8 I/Os simultaneously used as output at low level with IOL = 20 mA (VOL= 1.3 V), the power consumption from power supply PINT is: PINT = 50 mA × 3.6 V= 118 mW, the power loss through I/Os PIO is PIO = 20 × 8 mA × 0.4 V + 8 × 20 mA × 1.3 V = 272 mW, and the total power PD to dissipate is: PD = 180 mW + 272 mW = 452 mW For a package with ΘJA= 65 °C/W, the junction temperature stabilizes at: TJ = 50°C + (65 °C/W × 452 mW) = 50 °C + 29.4 °C = 79.4 °C As a conclusion, product version with suffix 6 (maximum allowed TJ = 105° C) is sufficient for this application. If the same application was used in a hot environment with maximum TA greater than 75.5 °C, the junction temperature would exceed 105°C and the product version allowing higher maximum TJ would have to be ordered. |
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