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SI-3033KS Scheda tecnica(PDF) 3 Page - Sanken electric |
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SI-3033KS Scheda tecnica(HTML) 3 Page - Sanken electric |
3 / 6 page sReference Data Thermal resistance vs. Copper area Power dissipation vs. Copper area sExample of Solder Pattern Design Symbol Dimensions (mm) e1 5.72 e 1.27 ±0.15 α 0.2 β1 0.2 to 0.5 β2 0.2 L 0.6 b2 0.76 l2 L+ β1+β2 *1 The inner frame stage on which a monolithic IC is mounted is directly connected to the GND pins (pins 5 through 8). By expanding the area of the copper connected to the GND pins, the heat radiation can be improved. It is recommended to design the solder pattern by opening the insulation film of the solder patterns of pins 5, 6, 7, and 8, on the wide GND pattern as shown in Figure 1. (Reference value conforming to EIAJ Standard ED-7402-1) • Calculating junction temperature Measure the temperature TL of the lead of the GND pin (pin 7) by using a thermocouple, and substitute the measured value into the following expression to calculate the junction temperature. Tj=PD × θj–L + TL ( θj–L = 22°C/W) qSI-3000KS Series L e L L α B1 B2 e e1 b e ee e e1 l2 b2 *1 Figure 1 ee e 8 GND pattern 1 7 2 6 3 5 b2 e1 l2 4 Copper area (mm2) 10 100 140 120 100 80 60 40 1000 Area of PC board : 40 ×40mm Copper area (mm2) 10 100 1.2 1 0.8 0.6 0.4 0.2 0 1000 Tj=100 °C Area of PC board : 40×40mm Ta=25 °C Ta=50 °C Ta=80 °C |
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