LTC4010_15 Datasheet, PDF (5/24 Pages) Linear Technology – High Efficiency Standalone Nickel Battery Charger

Typical Performance Characteristics
LTC4010
NiMH Charge Cycle at 0.5C
1.60
45
4 SERIES NiMH 2100mAhr
AA CELLS CHARGED AT 0.5C
1.55
40
SINGLE CELL
VOLTAGE
1.50
35
1.45
30
BATTERY
TEMPERATURE
1.40
1A
25
CHARGE CURRENT
1.45
0.5A
20
1.30
0
TOP OFF
15
20 40 60 80 100 120 140 160 180 200
TIME (MINUTES)
4010 G03
Automatic Recharge Threshold
Voltage (per Cell)
1.375
1.355
1.335
1.315
1.295
1.275
–50 –30 –10 10 30 50
TEMPERATURE (°C)
70 90
4010 G06
Battery Present Threshold
Voltage (per Cell)
370
360
350
340
330
320
–50 –30 –10 10 30 50
TEMPERATURE (°C)
70 90
4010 G04
Battery Overvoltage Threshold
Voltage (per Cell)
2.05
2.03
2.01
1.99
1.97
1.95
1.93
1.91
1.89
1.87
1.85
–50 –30 –10 10 30 50 70 90
TEMPERATURE (°C)
4010 G07
Minimum Fast Charge Threshold
Voltage (per Cell)
950
940
930
920
910
900
890
880
870
860
850
–50 –30 –10 10 30 50 70 90
TEMPERATURE (°C)
4010 G05
–∆V Termination Voltage
(per Cell)
0
–5
–10
NiMH
–15
–20
NiCd
–25
–50 –30 –10 10 30 50
TEMPERATURE (°C)
70 90
4010 G08
Programmable Timer Accuracy
20
R_TIMER = 49.9k
15
10
5
0
–5
–10
–15
–20
–50 –30 –10 10 30 50
TEMPERATURE (°C)
70 90
4010 G09
Charge Current Accuracy
5
3
TOP-OFF CHARGE
1
FAST CHARGE
–1
PRECHARGE
–3
–5
–50 –30 –10 10 30 50
TEMPERATURE (°C)
70 90
4010 G10
PWM Switching Frequency
1000
BAT = 4.8V
100
MINIMUM (LOW DROPOUT)
V_CC = 12V
10
–50 –30 –10 10 30 50
TEMPERATURE (°C)
70 90
4010 G11
4010fb