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STM32F401CB Datasheet(PDF) 129 Page - STMicroelectronics |
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STM32F401CB Datasheet(HTML) 129 Page - STMicroelectronics |
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129 / 134 page  DocID024738 Rev 5 129/134 STM32F401xB STM32F401xC Package information 130 7.6 Thermal characteristics The maximum chip junction temperature (TJmax) must never exceed the values given in Table 14: General operating conditions on page 59. The maximum chip-junction temperature, TJ max., in degrees Celsius, may be calculated using the following equation: TJ max = TA max + (PD max x ΘJA) Where: • TA max is the maximum ambient temperature in °C, •ΘJA is the package junction-to-ambient thermal resistance, in °C/W, • PD max is the sum of PINT max and PI/O max (PD max = PINT max + PI/Omax), • PINT max is the product of IDD and VDD, expressed in Watts. This is the maximum chip internal power. PI/O max represents the maximum power dissipation on output pins where: PI/O max = 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. 7.6.1 Reference document JESD51-2 Integrated Circuits Thermal Test Method Environment Conditions - Natural Convection (Still Air). Available from www.jedec.org. Table 86. Package thermal characteristics Symbol Parameter Value Unit ΘJA Thermal resistance junction-ambient UFQFPN48 32 °C/W Thermal resistance junction-ambient WLCSP49 52 Thermal resistance junction-ambient LQFP64 50 Thermal resistance junction-ambient LQFP100 42 Thermal resistance junction-ambient UFBGA100 56 |
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