LTC1960 データシートの表示（PDF） - Linear Technology
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LTC1960 Datasheet PDF : 28 Pages
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LTC1960
TYPICAL PERFORMANCE CHARACTERISTICS
Battery Drain Current
(BAT1 Selected)
250
TA = 25°C
240
230
220
210
200
190
180
170
160
150
6
12
18
24
BAT1 VOLTAGE (V)
30
1960 G01
PowerPath Switching
16
CLOAD = 20µF
15 ILOAD = 0.8A
14 TA = 25°C
13
12
11
10
9
LOPWR
8
THRESHOLD
7
6
–50 –40 –30 –20 –10 0 10 20 30 40 50
TIME (µs)
1960 G02
PowerPath Autonomous
Switching
16
15
14
13
12
11
10
BAT1
9
REMOVED
8
7 NOTE: LIGHT LOAD TO
EXAGGERATE SWITCHING EVENT
6
–1 0
1
2
3
TIME (SEC)
4
5
1960 G03
Charger Efficiency
100
90
80
70
60
50
40
30
20
10
0
0
0.025 0.10 0.50
IOUT (A)
2.5 4.0
1960 G04
Charger Load Regulation
12.4
12.3
12.2
12.1
12.0
11.9
11.8 VIN = 20V
VDAC = 12.288V
11.7 IDAC = 4000mA
TA = 25°C
11.6
0
1000 2000
3000
CHARGE CURRENT (mA)
4000
1960 G07
6
Charger Start-Up
12
10
8
6
4
2
0
–0.05 0
0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40
TIME (SEC)
1960 G05
Charging Current Accuracy
120
VDCIN = 20V
100
VBAT1 = 12V
RSNS = 0.025Ω
80 TA = 25°C
60
40
20
0
–20
–40
0 200 400 600 800 1000 1200
IDAC VALUE
1960 G08
Charger Load Dump
14
BAT1
OUTPUT
12
VIN = 20V
10
VDAC = 12.29V
IDAC = 3000mA
LOAD CURRENT = 1A
8
TA = 25°C
6
LOAD
CONNECTED
4
2
0
–4 –2
LOAD
DISCONNECTED
0 2 468
TIME (ms)
10 12 14 16
1960 G06
IDAC Low Current Mode
vs Normal Mode
500
VIN = 20V
450 VBAT1 = 12V
400
RSNS = 0.025Ω
TA = 25°C
350
300
250
LOW CURRENT
MODE
200
150
NORMAL
MODE
100
50
0
0 80 160 240 320 400 480 560
PROGRAMMED CURRENT (mA)
1960 G09
1960fb
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