Ds2710 single-cell nimh charger – Rainbow Electronics DS2710 User Manual
Page 6
DS2710
Single-Cell NiMH Charger
6
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PRECHARGE
CS = ACTIVE 25% DF
STATUS = 1Hz TOGGLE
CELL TEST
CS = INACTIVE
STATUS = HIGH
FAST-CHARGE
CS = ACTIVE
STATUS = HIGH
TOP-OFF
CS = ACTIVE 25% DF
STATUS = HIGH
MAINTENANCE
CS = ACTIVE 1.56% DF
STATUS = LOW
FAULT
CS = INACTIVE
STATUS = 4Hz TOGGLE
PRESENCE
CS = INACTIVE
STATUS = LOW
t < FAST TIMEOUT
t < TOP-OFF TIMEOUT
t > FAST TIMEOUT
T > +50
°C
PASS
31s INTERVAL
SUSPEND
CS = INACTIVE
STATUS = LOW
R
TMR
> R
SUSPEND
(ASYNCHRONOUSLY FROM ANYWHERE)
R
TMR
< R
SUSPEND
V
DD
> V
UVLO
(3.5V)
V
DD
< V
UVLO
- V
UHYS
(ASYNCHRONOUSLY FROM ANYWHERE)
t < t
PCHG
AND
V
CELL
< 1.0V
V
CELL
> 1.0V
AND
t < t
PCHG
AND
T < +50
°C
t > t
PCHG
OR
T > +50
°C
OR
V
CELL
> V
MAX
*
T > +50
°C
OR
t > TOP-OFF TIMEOUT
-
ΔV DETECT
OR
FLAT VOLTAGE DETECT
*V
MAX
REPRESENTS V
MAX-CHARGE
WHEN THE CS OUTPUT IS ACTIVE AND V
MAX-OPEN
WHEN THE CS OUTPUT IS INACTIVE.
V
CELL
> 1.75V
OR
T < 0
°C
OR
T > +45
°C
V
CELL
> 1.75V
V
CELL
< V
MAX-OPEN
FAIL: V
CELL
> V
MAX-OPEN
OR
ΔV > CTEST
V
CELL
> V
MAX
*
V
CELL
> V
MAX
*
POR
CS = INACTIVE
Figure 2. State Diagram