LTC4010_15 Datasheet, PDF (6/24 Pages) Linear Technology – High Efficiency Standalone Nickel Battery Charger

LTC4010
Typical Performance Characteristics
Charger Efficiency
90
DCIN = 5.5V
I_OUT = 2A
85
80
75
70
65
1
1.5 2 2.5 3 3.5
BATTERY VOLTAGE (V)
4 4.5
4010 G12
Fast Charge Current Line
Regulation
3
BAT = 4.8V
2
1
0
50°C
25°C
–1
0°C
–2
–3
6
10 14 18 22 26 30
V_CC (V)
4010 G15
PWM Input Bias Current (OFF)
6
5
4
3
2
BAT
1
SENSE
0
–1
–50 –30 –10 10 30 50
TEMPERATURE (°C)
70 90
4010 G18
Charger Efficiency
100
DCIN = 20V
I_OUT = 2A
90
80
70
60
0 2 4 6 8 10 12 14 16 18 20
BATTERY VOLTAGE (V)
4010 G13
Fast Charge Current Output
Regulation
3 _{VCC = 20V}
2
1
0
50°C
25°C
–1
0°C
–2
–3
0
4
8
12
BATTERY VOLTAGE (V)
16
4010 G16
Undervoltage Lockout Threshold
Voltage
4.45
4.35
4.25
4.15
4.05
3.95
–50 –30 –10 10 30 50
TEMPERATURE (°C)
70 90
4010 G19

Charger Soft-Start
10
SWITCHING
5
TGATE
5
BGATE
0
2
FAST CHARGE CURRENT
1
PRECHARGE ⁰
CURRENT
200µs/DIV
4010 G14
Shutdown Quiescent Current
10
8
6
4
2
0
–50 –30 –10 10 30 50
TEMPERATURE (°C)
70 90
4010 G17
Shutdown Threshold Voltage
(V_CC – BAT)
100
80
V_CC INCREASING
60
40
V_CC DECREASING
20
0
–50 –30 –10 10 30 50
TEMPERATURE (°C)
70 90
4010 G20
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