CAT874 Datasheet, PDF (4/7 Pages) ON Semiconductor – Smart Phone Battery Switch Controller

CAT874
TIMING WAVEFORMS
H
VBAT
L
H
V_CHG
L
H
PWRON
L
<8s 8s
H
8s
8s
8s
OUT
L
if PWRON is
LOW for less
than 8s, OUT
remains LOW
After a H−to−L
transition on
PWRON, OUT
goes LOW
t_{low_delay}
if PWRON is
LOW for more
than 8s, OUT
goes HIGH
After a L−to−H
transition on
V_CHG, OUT
goes LOW
VBAT goes
LOW & V_CHG
is low the circuit
powers down
A L−to−H transition
on V_CHG if VBAT
is LOW causes a
power−on and OUT
remains LOW
8s
After a H−to−L
transition on V_CHG
if VBAT is HIGH,
OUT remains
unchanged
A L−to−H transition
on V_CHG if VBAT
is HIGH causes
nothing if OUT is
already LOW
Figure 3. Timing Waveforms
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