Datasheet

MAX4959/MAX4960
High-Voltage OVP with Battery Switchover
8
Maxim Integrated
V
IN
V
OVLO
V
OVLO
V
UVLO
V
DD REGULATED
t
DEB
t
DEB
t
BLANK
t
BLANK
t
DEB
V
UVLO
INTUV
REF
V
GATE1
V
DD
V
CB
V
GATE2
Figure 1. Timing Diagram
IN RANGE P1 STATE P2 STATE
V
IN
> V
OVLO
P1 OFF (not affected by CB)
V
UVLO
< V
IN
< V
OVLO
(debounce timeout ongoing)
P1 OFF (not affected by CB)
V
UVLO
< V
IN
< V
OVLO
(debounce timeout elapsed)
CB = 1 -> P1 is OFF
CB = 0 -> P1 is ON
V
INTUVREF
< V
IN
< V
OVLO
(blanking timeout ongoing)
CB = 1 -> P1 is OFF
CB = 0 -> P1 is ON
V
INTUVREF
< V
IN
< V
OVLO
(blanking timeout elapsed)
P1 OFF (not affected by CB). P1 does not turn on again until
adapter is unplugged (V
IN
< ~0.75V) and plugged in again.
V
IN
< V
INTUVREF
P1 OFF (not affected by CB). P1 does not turn on again until
adapter is unplugged (V
IN
< ~0.75V) and plugged in again.
CB = 1 -> P2 is ON
CB = 0 -> P2 is OFF
The following table lists the different modes of operations: