Data Sheet

© 2012 Fairchild Semiconductor Corporation www.fairchildsemi.com
FPF3040 • Rev. 2.4.3 3
FPF3040 — IntelliMAX™ 18 V-Rated Dual Input Single Output Power-Source-Selector Switch
Block Diagram
TSD
V
REF
Gate Driver
&
Logic Control
V
CC
C1
C2
FPF3040
V
IN
V
BUS
V
IN
_
SEL
Other_V
IN
_
AVA
DF_IN
V
OUT
V
BUS
V
OUT
GND
EN
C1
HV Power Device
SW1
C2
HV Power Device
SW2
V
IN
VMAX
OVP
V
CC
Startup
Reference Voltage
Reference Current
Thermal Protection
V
CC
V
GATE
GND
V
OUT
V
OUT
V
IN
V
BUS
Figure 3. Functional Block Diagram