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DS2712E+T Datasheet(PDF) 5 Page - Maxim Integrated Products

Part # DS2712E+T
Description  Loose-Cell NiMH Chargers Detect and Avoid Charging Alkaline Cells
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

DS2712E+T Datasheet(HTML) 5 Page - Maxim Integrated Products

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


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