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RP112K361D Datasheet(PDF) 11 Page - RICOH electronics devices division |
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RP112K361D Datasheet(HTML) 11 Page - RICOH electronics devices division |
11 / 32 page RP112x NO.EA-258-131024 11 • Power Dissipation (SC-88A) Power Dissipation (PD) depends on conditions of mounting on board. This specification is based on the measurement at the conditions below: Measurement Conditions: Standard Test Land Pattern Environment Mounting on Board (Wind velocity=0m/s) Board Material Glass cloth epoxy plastic (Double Layers) Board Dimensions 40mm × 40mm × 1.6mm Copper Ratio Top side: Approx. 50%, Back side: Approx. 50% Through-hole φ 0.5mm x 44pcs Measurement Result: (Ta=25 °C) Standard Test Land Pattern Free Air Power Dissipation 380mW (Tjmax=125 °C) 475mW (Tjmax=150 °C) 150mW θja=(125-25°C)/0.38W=263°C/W θja=(125-25°C)/0.15W=667°C/W Thermal Resistance θjc=75°C/W - 0 100 200 300 400 500 600 0 25 50 75 100 125 150 Ambient Temperature (ºC) 150 380 475 85 Free Air Standard Test Land Pattern Power Dissipation Measurement Board Pattern IC Mount Area (Unit: mm) 40 The above graph shows that the power dissipation of the package under the conditions of Tjmax=125 °C and Tjmax=150°C. The use under the diagonal line in the graph might have an affect on the ICs’ lifetime. Please use the ICs within the limited operating time and estimated years as described below. Operating Time Estimated Years (4hrs/day) 13,000 hours 9 years |
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