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LPC5410X Datasheet(PDF) 40 Page - NXP Semiconductors |
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LPC5410X Datasheet(HTML) 40 Page - NXP Semiconductors |
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40 / 95 page ![]() LPC5410x All information provided in this document is subject to legal disclaimers. © NXP B.V. 2019. All rights reserved. Product data sheet Rev. 2.11 — 19 September 2019 40 of 95 NXP Semiconductors LPC5410x 32-bit ARM Cortex-M4/M0+ microcontroller 9. Thermal characteristics The average chip junction temperature, Tj (C), can be calculated using the following equation: (1) • Tamb = ambient temperature (C), • Rth(j-a) = the package junction-to-ambient thermal resistance (C/W) • PD = sum of internal and I/O power dissipation The internal power dissipation is the product of IDD and VDD. The I/O power dissipation of the I/O pins is often small and many times can be negligible. However it can be significant in some applications. Table 8. Thermal resistance Symbol Parameter Conditions Max/Min Unit LQFP64 Package Rth(j-a) thermal resistance from junction to ambient JEDEC (4.5 in 4 in); still air 58 ± 15 % C/W Single-layer (4.5 in 3 in); still air 81 ± 15 % C/W Rth(j-c) thermal resistance from junction to case 18 ± 15 % C/W WLCSP49 Package Rth(j-a) thermal resistance from junction to ambient JEDEC (4.5 in 4 in); still air 41 ± 15 % C/W Rth(j-c) thermal resistance from junction to case 0.3 ± 15 % C/W T j T amb PD Rth j a – + = |
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