LT1952-1(RevD) 데이터 시트보기 (PDF) - Linear Technology
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LT1952-1 Datasheet PDF : 24 Pages
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LT1952/LT1952-1
TYPICAL PERFORMANCE CHARACTERISTICS
COMP Source Current
vs Temperature
12.5
FB = 1V
COMP = 1.6V
10.0
7.5
CURRENT OUT OF PIN
5.0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1952 G10
ISENSE Maximum Threshold
vs COMP
240
TA = 25°C
RISENSE = 0k
200
160
120
OC THRESHOLD
80
40
0
0 0.5 1.0 1.5 2.0 2.5 3.0
COMP (V)
1952 G13
ISENSE Maximum Threshold
vs Duty Cycle (Programming
Slope Compensation)
225
215
RSLOPE = 0W
205
RSLOPE = 470W
195
185
TA = 25°C
RSLOPE = 1k
COMP = 2.5V
175
0 10 20 30 40 50 60 70 80 90 100
DUTY CYCLE (%)
1952 G16
6
COMP Sink Current
vs Temperature
12.5
FB = 1.4V
COMP = 1.6V
10.0
7.5
5.0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1952 G11
ISENSE Maximum Threshold
vs Temperature
240
COMP = 2.5V
RISENSE = 0k
230
220
210
200
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1952 G14
OC (Overcurrent) Threshold
vs Temperature
120
PRECISION OVERCURRENT THRESHOLD
INDEPENDENT OF DUTY CYCLE
110
100
90
80
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1952 G17
(Disabled) COMP Pin Current
vs Temperature
50
FB = VREF
COMP = 1.6V
40
30
20
10
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1952 G12
ISENSE Pin Current (Out of Pin)
vs Duty Cycle
40
TA = 25°C
30
20
10
0
0 10 20 30 40 50 60 70 80 90 100
DUTY CYCLE (%)
1952 G15
Blank Duration vs Temperature
800
600
RBLANK = 120k
400
200
RBLANK = 40k
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1952 G18
19521fd
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