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STM8S003K3 데이터시트(PDF) 94 Page - STMicroelectronics |
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STM8S003K3 데이터시트(HTML) 94 Page - STMicroelectronics |
94 / 100 page Thermal characteristics 11 The maximum chip junction temperature (TJ max) must never exceed the values given in Operating conditions. The maximum chip-junction temperature, TJmax, in degrees Celsius, may be calculated using the following equation: TJmax = TAmax + (PDmax x ΘJA) Where: • TAmax is the maximum ambient temperature in °C • ΘJA is the package junction-to-ambient thermal resistance in °C/W • PDmax is the sum of PINTmax and PI/Omax(PDmax = PINTmax + PI/Omax) • PINTmax is the product of IDDandVDD, expressed in Watts. This is the maximum chip internal power. • PI/Omax represents the maximum power dissipation on output pins Where: PI/Omax =Σ (VOL*IOL) + Σ((VDD-VOH)*IOH), taking into account the actual VOL/IOL and VOH/IOH of the I/Os at low and high level in the application. Table 54: Thermal characteristics Unit Value Parameter (1) Symbol °C/W 84 Thermal resistance junction-ambient TSSOP20 - 4.4 mm ΘJA 90 Thermal resistance junction-ambient ΘJA UFQFPN20 - 3 x 3 mm 60 Thermal resistance junction-ambient LQFP32 - 7 x 7 mm ΘJA (1)Thermal resistances are based on JEDEC JESD51-2 with 4-layer PCB in a natural convection environment. Reference document 11.1 JESD51-2 integrated circuits thermal test method environment conditions - natural convection (still air). Available from www.jedec.org. Selecting the product temperature range 11.2 When ordering the microcontroller, the temperature range is specified in the order code. DocID018576 Rev 3 94/100 STM8S003K3 STM8S003F3 Thermal characteristics |
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