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VNF9Q20F Datasheet(PDF) 94 Page - STMicroelectronics |
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VNF9Q20F Datasheet(HTML) 94 Page - STMicroelectronics |
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94 / 109 page  Figure 47. QFN 6x6 thermal impedance junction ambient 101 100 102 10-4 10-3 10-2 103 10-1 100 101 102 Time (s) ZthJA (°C/W) Cu = footprint Cu = 2 cm2 Cu = 8 cm2 4 layer Zthδ = Rth · δ + Ztht p (1 - δ) where δ = tP/T Figure 48. Thermal fitting model R3 R4 R5 R6 C3 C4 C5 C6 PdCh0 PdCh1 TJ TJ R1 R2 R7 R8 C1 C2 C7 C8 PdCh2 PdCh3 TJ TJ R9 R10 R11 R12 C9 C10 C11 C12 GADG050120230849GT Note: The fitting model is a simplified thermal tool and is valid for transient evolutions where the embedded protections (power limitation or thermal cycling during thermal shutdown) are not triggered. VNF9Q20F Package and PCB thermal data DS13909 - Rev 6 page 94/109 |
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