Fairchild SEMICONDUCTOR AN-7502 - Manual (Page 8)

©2002 Fairchild Semiconductor Corporation Application Note 7502 Rev. A1
Case 3 :Common-Source Gate Drive, Figure B-3
FIGURE B-3. COMMON-SOURCE GATE-DRIVE CIRCUIT
Turn-On
R
O
= R
D
(drain-to-ground capacitance of driving device adds to
C
GS
of driven MOSFET.)
Turn Off
R
O
= r
DS(ON)
of driving MOSFET when
R
D
is very much greater than R
DS(ON)
+
R
D
V DD
R L
10V
0V
Application Note 7502