Datasheet NDS8947 (Fairchild) - 3

Electrical Characteristics
(T = 25°C unless otherwise noted) A
Symbol Parameter Conditions Min Typ Max Units DRAIN-SOURCE DIODE CHARACTERISTICS AND MAXIMUM RATINGS
I Maximum Continuous Drain-Source Diode Forward Current -1.3 A S V Drain-Source Diode Forward Voltage V = 0 V, I = -1.3 A SD
GS S
(Note 2) -0.85 -1.2 V t Reverse Recovery Time V = 0 V, I = -1.3 A, dI /dt = 100 A/µs 100 ns rr GS F F Notes: 1. Rθ 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. R is guaranteed by JA θJC design while Rθ is determined by the user's board design. CA −T −T P ( A = TJ A = 2 ( D t) = TJ I t) × R Rθ ( D DS(ON ) TJ J At) Rθ + ( J C RθCA t) Typical R for single device operation using the board layouts shown below on 4.5"x5" FR-4 PCB in a still air environment: θJA a. 78oC/W when mounted on a 0.5 in2 pad of 2oz copper. b. 125oC/W when mounted on a 0.02 in2 pad of 2oz copper. c. 135oC/W when mounted on a 0.003 in2 pad of 2oz copper. 1a 1b 1c Scale 1 : 1 on letter size paper 2. Pulse Test: Pulse Width < 300µs, Duty Cycle < 2.0%.. NDS8947.SAM