ds2710 Maxim Integrated Products, Inc., ds2710 Datasheet - Page 6

• Manufacturer Part Number: ds2710
• Description: Single-cell Nimh Charger
• Manufacturer: Maxim Integrated Products, Inc.

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