DS2711 查看數據表（PDF） - Maxim Integrated
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DS2711 Datasheet PDF : 15 Pages
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Figure 2. State Diagram
DS2711/DS2712: Loose-Cell NiMH Chargers
VDD < VPOR -VHYS
(asynchronously from
anywhere)
POR
Standby power
CCx = Hi-Z
LEDx = Hi-Z
VDD > VPOR (3.7V)
Presence
TEST
CCx = Hi-Z
LEDx = No Battery
VBAT > 1.75V
OR
T < 0C
OR
T > 45C
t < PCTimeout
OR
VBAT < 1V
PreCHG
CCx = Active
12.5% Par., 25% Ser.
LEDx = Charging
VBAT < 1.65V
VBAT > 1.75V
VBAT > 1V
AND
t < PCTimeout
AND
T < 50C
t > PCTimeout
OR T < 0
OR T > 50
OR VBAT > 1.75V
FAULT
Standby power
CCx = Hi-Z
LEDx = Fault
Cell Test
CCx = Hi-Z
LEDx = Charging
FAIL:
VON - VOFF > VCTST
t < Fast Timeout
PASS
Fast
CHG
CCx = Active
48% Par., 97% Ser.
LEDx = Charging
32 clock
interval
VBAT > 1.75V
VBAT > 1.75V
(asynchronously
from anywhere)
t < 1s
delta-V detect
OR
t > Fast Timeout
t < Topoff Timeout
Topoff
CHG
CCx = Active
12.5% Par., 25% Ser.
LEDx = Charging
T > 50
T > 50
OR
t > Topoff Timeout
MAINT
CCx = Active 1/64
LEDx = Maintenance
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