8. FUNCTIONAL DESCRIPTION
12
EPSON
S1F76980 Technical Manual (Rev.1.0)
(5) Power supply switching operation 2 (ON-ON switching)
Fig.8.4.4 shows an example of power supply switching operation 2 on connection / disconnection of power
supply with a higher priority level.
Description of each state
State A: Input power not selected.
(OB1:OFF, OB2:OFF, OU1:OFF, OU2:OFF, OC1:OFF, OC2:OFF)
State B: V
BAT
input power supply selected, backflow from V
OUT
prevented
(OB1:ON, OB2:OFF, OU1:OFF, OU2:OFF, OC1:OFF, OC2:OFF)
State C: V
BAT
input power supply selected, full on state
(OB1:ON, OB2:ON, OU1:OFF, OU2:OFF, OC1:OFF, OC2:OFF)
State D: V
CC
input power supply selected, backflow from V
OUT
prevented
(OB1:OFF, OB2:OFF, OU1:OFF, OU2:OFF, OC1:ON, OC2:OFF)
State E: V
CC
input power supply selected, full on state
(OB1:OFF, OB2:OFF, OU1:OFF, OU2:OFF, OC1:ON, OC2:ON)
State F: V
BAT
and V
CC
input power supplies selected simultaneously (ON-ON), backflow from V
OUT
prevented
on the V
CC
side only.
(OB1:ON, OB2:ON, OU1:OFF, OU2:OFF, OC1:ON, OC2:OFF)
State G: V
BAT
and V
CC
input power supplies selected simultaneously (ON-ON), full on state
(OB1:ON, OB2:ON, OU1:OFF, OU2:OFF, OC1:ON, OC2:ON)
State C
State B
State E
State A
State D
State F
State G
