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STM32F303VC 数据表(PDF) 140 Page - STMicroelectronics |
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STM32F303VC 数据表(HTML) 140 Page - STMicroelectronics |
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140 / 148 page  Package information STM32F303xB STM32F303xC 140/148 DocID023353 Rev 13 Example 2: High-temperature application Using the same rules, it is possible to address applications that run at high ambient temperatures with a low dissipation, as long as junction temperature TJ remains within the specified range. Assuming the following application conditions: Maximum ambient temperature TAmax = 115 °C (measured according to JESD51-2), IDDmax = 20 mA, VDD = 3.5 V, maximum 9 I/Os used at the same time in output at low level with IOL = 8 mA, VOL= 0.4 V PINTmax = 20 mA × 3.5 V= 70 mW PIOmax = 9 × 8 mA × 0.4 V = 28.8 mW This gives: PINTmax = 70 mW and PIOmax = 28.8 mW: PDmax = 70 + 28.8 = 98.8 mW Thus: PDmax = 98.8 mW Using the values obtained in Table 86 TJmax is calculated as follows: – For LQFP100, 41°C/W TJmax = 115 °C + (41°C/W × 98.8 mW) = 115 °C + 4.05 °C = 119.05 °C This is within the range of the suffix 7 version parts (–40 < TJ < 125 °C). In this case, parts must be ordered at least with the temperature range suffix 7 (see Section 8: Ordering information). |
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