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NDS9948 Datasheet(PDF) 3 Page - Fairchild Semiconductor |
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NDS9948 Datasheet(HTML) 3 Page - Fairchild Semiconductor |
3 / 10 page Electrical Characteristics (T A = 25°C unless otherwise noted) Symbol Parameter Conditions Min Typ Max Units DRAIN-SOURCE DIODE CHARACTERISTICS AND MAXIMUM RATINGS I S Maximum Continuous Drain-Source Diode Forward Current -1.7 A V SD Drain-Source Diode Forward Voltage V GS = 0 V, IS = -2.3 A (Note 2) -0.98 -1.2 V Notes: 1. R θJA is the sum of the junction-to-case and case-to-ambient thermal resistance where the case thermal reference is defined as the solder mounting surface of the drain pins. RθJC is guaranteed by design while R θCA is determined by the user's board design. PD (t) = TJ −TA R θJ A(t) = TJ −TA R θJ C+RθCA(t) = I D 2 (t) × R DS (ON ) TJ Typical RθJA for single device operation using the board layouts shown below on 4.5"x5" FR-4 PCB in a still air environment: a. 78 oC/W when mounted on a 0.5 in2 pad of 2oz cpperr. b. 125 oC/W when mounted on a 0.02 in2 pad of 2oz cpper. c. 135 oC/W when mounted on a 0.003 in2 pad of 2oz cpper. Scale 1 : 1 on letter size paper 2. Pulse Test: Pulse Width < 300µs, Duty Cycle < 2.0%. NDS9948.SAM 1a 1b 1c |
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