LT3597IUHG データシートの表示（PDF） - Linear Technology
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LT3597IUHG Datasheet PDF : 24 Pages
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LT3597
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted.
Boost Diode VF
800
Soft-Start
700
–40°C
600
25°C
500
125°C
400
300
200
100
VEN/UVLO
5V/DIV
VSW
20V/DIV
IL
100mA/DIV
VOUT
20V/DIV
0
0
2
4
6
8
10
DIODE CURRENT (mA)
3597 G10
400µs/DIV
60V Switching Waveforms
VSW
20V/DIV
IL
100mA/DIV
VOUT
20V/DIV
3597 G11
400ns/DIV
3597 G12
Loop Regulation Voltage
1.4
1.3
VFB
1.2
1.1
VLED
(ADAPTIVE LOOP)
1.0
0.9
–50 –25
0 25 50 75 100 125
TEMPERATURE (°C)
3597 G13
LED Current
103
102
101
CH1
CH2
100
CH3
99
98
97
–50 –25
0 25 50 75 100 125
TEMPERATURE (°C)
3597 G14
LED Current Matching
0.50
0.25
0
–0.25
CH3
CH1
CH2
–0.50
–50 –25
0 25 50 75 100 125
TEMPERATURE (°C)
3597 G15
LED Current vs PWM Duty Cycle
100
10
1
0.1
0.01
0.001
0.0001
0.001
0.01 0.1
1
DUTY CYCLE (%)
10
100
3597 G16
6
LED Current vs CTRL
120
100
80
60
40
20
Adaptive Loop Operation
ILED
100mA/DIV
VOUT
10V/DIV
VLED
10V/DIV
VSW
20V/DIV
0
0 0.25 0.5 0.75 1 1.25 1.5
CTRL VOLTAGE (V)
3597 G17
400µs/DIV
3597 G18
3597f
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