User Manual
DS2710
Single-Cell NiMH Charger
_______________________________________________________________________________________ 3
Note 1: Voltages relative to V
SS
.
Note 2: Specification does not include CS and STATUS pin currents.
Note 3: STATUS pin is active high.
Note 4: Specification is guaranteed by design.
Note 5: Specification applicable during charge cycle with T
A
= 0°C to +70°C.
Note 6: 50mV overdrive while connected to a pMOS transistor (such as ZXM62P02 from Zetex).
Note 7: V
BAT-MAX1
and V
BAT-MAX1
ranges never overlap.
Note 8: VT
HM-MIN
, V
THM-MAX
, and V
THM-STOP
are fixed ratios of V
DD
. Their ranges never overlap.
Note 9: Maximum allowable leakage on TMR to maintain SUSPEND state.
DC ELECTRICAL CHARACTERISTICS (continued)
(4.0V ≤ V
DD
≤ 5.5V, T
A
= -20°C to +70°C, unless otherwise noted.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Cold Temperature Detect
Threshold
V
THM-MIN
(Notes 1, 5, 8) 0.73 V
DD
Hot Temperature No-Start
Threshold
V
THM-MAX
(Notes 1, 5, 8) 0.30 0.33 0.36 V
DD
Hot Temperature Safety
Shutdown Threshold
V
THM-STOP
(Notes 1, 5, 8) 0.29 V
DD
SUSPEND Current Threshold I
SUSPEND
(Note 9) 0.1 0.5 μA
Presence-Test Current, VP1 V
DD
4.0V 1.0 10 15 μA
Reverse-Leakage Current, VP1 V
DD
= 0V, V
P1
= 1.5V 2 μA
Impedance-Voltage Test Range V
CTEST
32 400 mV
ELECTRICAL CHARACTERISTICS: TIMING
(4.0V ≤ V
DD
≤ 5.5V, T
A
= -20°C to +70°C, unless otherwise noted.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Internal Time-Base Period t
BASE
0.96 Seconds
Internal Time-Base Accuracy -10 +10 %
DF1 FAST-CHARGE 96.9
DF2 PRECHARGE/TOP-OFF 25.0
CS Output Duty Factor
DF3 MAINTENANCE 1.56
%
CELL TEST Interval t
CTST
31 Seconds
PRECHARGE Timeout t
PCHG
V
CELL
< V
LOW
34 Minutes
FAST-CHARGE Termination
Hold-Off Period
t
THO
4 Minutes
FAST-CHARGE Flat Voltage
Timeout
t
FLAT
V
CELL
not increasing 16 Minutes
Charge-Timer Period t
CTMR
R
TMR
= 40k 1.0 Hours
Charge-Timer Accuracy R
TMR
= 40k -6 +6 %
Charge-Timer Range t
CTMR-RANGE
0.5 5.0 Hours
Toggle Rate, Charging f
CHARGE
1 Hz
Toggle Rate, FAULT State f
FAULT
4 Hz