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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AN2844 датащи(PDF) 25 Page - STMicroelectronics |
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AN2844 датащи(HTML) 25 Page - STMicroelectronics |
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25 / 37 page  AN2844 Thermal measurements 25/37 6 Thermal measurements A thermal analysis of the major components of the board is shown in Table 6 and Table 7. All measurements were performed after one hour of operation. TA: the ambient temperature for all measurements is 25 °C. Table 6. Temperature of key components at 125 VDC - full load (3 A output current) Ref. Component description Temperature [°C] R2 NTC 35 D2 Clamp resistors (R2; R3) 35 Q1 ESBT switch STC03DE220HV 37 U1 L6565 35 T1 Transformer - ferrite 44 T1 Transformer - windings 65 Q2 Output diode 80 C12/C13 Bulk capacitors 35 Table 7. Temperature of key components at 1250 VDC - low load (3 A output current) Ref. Component description Temperature [°C] R2 NTC 35 D2 Clamp resistors (R2; R3) 45 Q1 ESBT switch STC03DE220HV 75 U1 L6565 35 T1 Transformer - ferrite 48 T1 Transformer - windings 55 Q2 Output diode 73 C12/C13 Bulk capacitors 35 |
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