NDS9947 datasheet(3/10 Pages) FAIRCHILD

Part #	NDS9947

Description	Dual P-Channel Enhancement Mode Field Effect Transistor

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Manufacturer	FAIRCHILD [Fairchild Semiconductor]

Direct Link	http://www.fairchildsemi.com

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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 = -1.7 A (Note 2)

-0.9

-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 cpper.

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%..

NDS9947.SAM

1a

1b

1c

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