LTC3787HUFD-PBF 查看數據表（PDF） - Linear Technology
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LTC3787HUFD-PBF Datasheet PDF : 36 Pages
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LTC3787
TYPICAL PERFORMANCE CHARACTERISTICS
Efficiency and Power Loss
vs Output Current
100
10000
90
80
1000
70
60
100
50
40
10
30
20
10
0
0.01
VIN = 12V
1
VOUT = 24V
FIGURE 10 CIRCUIT
0.1
0.1
1
10
OUTPUT CURRENT (A)
3787 G01
BURST EFFICIENCY
BURST LOSS
PULSE-SKIPPING
PULSE-SKIPPING
EFFICIENCY
LOSS
FORCED CONTINUOUS
FORCED CONTINUOUS
MODE EFFICIENCY
MODE LOSS
Efficiency vs Load Current
100
VIN = 12V
99 ILOAD = 2A
FIGURE 10 CIRCUIT
98
97
96
VOUT = 12V
95
VOUT = 24V
94
93
92
91
90
0
5
10
15
20
INPUT VOLTAGE (V)
25
3787 G03
Load Step
Burst Mode Operation
LOAD STEP
5A/DIV
INDUCTOR
CURRENT
5A/DIV
VOUT
500mV/DIV
VIN = 12V
200μs/DIV
VOUT = 24V
LOAD STEP FROM 100mA TO 5A
FIGURE 10 CIRCUIT
3787 G05
Efficiency and Power Loss
vs Output Current
100
10000
90
80
1000
70
60
100
50
40
10
30
20
10
0
0.00001 0.0001 0.001
VIN = 12V
1
VOUT = 24V
Burst Mode OPERATION
FIGURE 10 CIRCUIT
0.1
0.01 0.1 1 10
OUTPUT CURRENT (A)
3787 G02
BURST EFFICIENCY
BURST LOSS
Load Step
Forced Continuous Mode
LOAD STEP
5A/DIV
INDUCTOR
CURRENT
5A/DIV
VOUT
500mV/DIV
VIN = 12V
200μs/DIV
VOUT = 24V
LOAD STEP FROM 100mA TO 5A
FIGURE 10 CIRCUIT
Load Step
Pulse-Skipping Mode
LOAD STEP
5A/DIV
3787 G04
INDUCTOR
CURRENT
5A/DIV
VOUT
500mV/DIV
VIN = 12V
200μs/DIV
VOUT = 24V
LOAD STEP FROM 100mA TO 5A
FIGURE 10 CIRCUIT
3787 G06
3787fc
5
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