8. FUNCTIONAL DESCRIPTION
10
EPSON
S1F76980 Technical Manual (Rev.1.0)
(3) Power-on
operation
Fig.8.4.2 shows an example of power-on operation from the initial state at power-on to the power selection.
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)
Description of transition conditions
{
: V
BAT
input enabled, backflow potential between input power supply (V
BAT
) and V
OUT
|
: V
BAT
input enabled, elimination of backflow potential between input power supply (V
BAT
) and V
OUT
(Typ.
19mV)
}
: V
BAT
input disabled
Fig.8.4.2 State transition at V
BAT
power-on
State A
State B
State C
V
BAT
power-on
