LTC4010 Datasheet, PDF (5/20 Pages) Linear Integrated Systems – High Efficiency Standalone Nickel Battery Charger

TYPICAL PERFOR A CE CHARACTERISTICS
Typical NiMH Charge Cycle
at 1C
1.65
36
1.60
34
1.55
1.50
1.45
1.40
1.35
1.30
0
SINGLE CELL
32
VOLTAGE
30
28
BATTERY
TEMPERATURE
26
1A
24
CHARGE CURRENT
22
20
40
60
80
TIME (MINUTES)
4010 G01
Charger Efficiency at DCIN = 20V,
I_OUT = 2A
100
95
90
85
80
75
70
67
60
0 2 4 6 8 10 12 14 16 18 20
BATTERY VOLTAGE (V)
4010 G04
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 G07
NiCd Charge at 2C
Charge Current Accuracy
0
FAST CHARGE
–2
–4
V_CC = 12V
BAT = 4.8V
–6
–8
PRECHARGE
–10
–12
0
10
20
30
40
50
TEMPERATURE (°C)
4010 G05
Fast Charge Current Output
Regulation
3
V_CC = 20V
2
1
0
50°C
25°C
–1
0°C
–2
–3
0
4
8
12
16
BAT (V)
4010 G08
LTC4010
NiMH Charge at 0.6C
Charger Soft-Start
10
5
TGATE
5
0
BGATE
2
FAST CHARGE CURRENT
1
0
PRECHARGE CURRENT
200µs/DIV
4010 G06
PowerPath Switching
8
DCIN OPEN
4
V_CC
0
INFET
DCIN
100µs/DIV
4010 G09
DC674A WITH 1kΩ SYSTEM LOAD AND 20kΩ
DCIN SHUNT, CHARGER PAUSED
4010p
5