DS2712 Maxim Integrated Products, Inc., DS2712 Datasheet - Page 6

• Manufacturer Part Number: DS2712
• Description: Loose Cell Nimh Chargers
• Manufacturer: Maxim Integrated Products, Inc.

Figure 2. STATE DIAGRAM
t < Fast Timeout
t < Topoff Timeout
VDD < VPOR -VHYS
(asynchronously from
anywhere)
t < PCTimeout
VBAT < 1V
OR
t < PCTimeout
VBAT > 1V
T < 50C
AND
AND
Standby power
t > Fast Timeout
12.5% Par., 25% Ser.
LEDx = Hi-Z
delta-V detect
CCx = Hi-Z
48% Par., 97% Ser.
POR
LEDx = Charging
LEDx = Charging
Topoff
CCx = Active
CCx = Active
CHG
CHG
Fast
OR
12.5% Par., 25% Ser.
PreCHG
LEDx = Charging
CCx = Active
PASS
VDD > VPOR (3.7V)
Cell Test
LEDx = Charging
32 clock
interval
CCx = Hi-Z
t > Topoff Timeout
t > PCTimeout
VBAT > 1.75V
VBAT < 1.65V
T > 50
T > 50
OR
OR
OR
FAIL:
VON - VOFF > V
6 of 14
Presence
LEDx = No Battery
TEST
CCx = Hi-Z
VBAT > 1.75V
CTST
LEDx = Maintenance
CCx = Active 1/64
FAULT
Standby power
MAINT
LEDx = Fault
CCx = Hi-Z
VBAT > 1.75V
T > 50
VBAT > 1.75V
T > 45C
T < 0C
OR
OR
VBAT > 1.75V
(asynchronously
from anywhere)
t < 1s