LT3754IUH 데이터 시트보기 (PDF) - Linear Technology
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LT3754IUH Datasheet PDF : 30 Pages
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LT3754
Typical Performance Characteristics TA = 25°C, unless otherwise noted.
INTVCC vs Current,
Junction Temperature
7.0
ILOAD = 10mA, 20mA, 30mA
6.9
6.8
ILOAD = 40mA
6.7
VIN = 8V, PWM = 0V
6.6
–50 –25 0 25 50 75 100 125
JUNCTION TEMPERATURE (°C)
3754 G13
INTVCC vs Current,
Junction Temperature
6.0
VIN = 6V, PWM = 0V
5.5
5.00
4.5
–50
ILOAD = 10mA
ILOAD = 20mA
ILOAD = 30mA
ILOAD = 40mA
–25 0 25 50 75 100 125
JUNCTION TEMPERATURE (°C)
3754 G14
INTVCC, UVLO(+), UVLO(–)
vs Junction Temperature
8
VIN = 12V
7
INTVCC (REGULATED)
6
5
4
INTVCC UVLO(+)
3
INTVCC UVLO(–)
2
–50 –25 0 25 50 75 100 125
JUNCTION TEMPERATURE (°C)
3754 G15
INTVCC Current Limit
vs Junction Temperature
60
VIN = 6V, INTVCC = 0V
55
50
45
40
–50
–25 0 25 50 75 100 125
JUNCTION TEMPERATURE (°C)
3754 G16
VOUT – V(LEDx) Short Threshold
vs Junction Temperature
7.00
6.75
6.50
6.25
VOUT = 60V
6.00
VOUT = 12V
5.75
5.50
5.25
5.00
–50
–25 0 25 50 75 100 125
JUNCTION TEMPERATURE (°C)
3754 G18
SENSE Threshold
vs Junction Temperature
60.0
57.5
55.0
52.5
50.0 INDUCTOR PEAK CURRENT THRESHOLD
47.5
(CYCLE-BY-CYCLE)
45.0
42.5
40.0
–50
–25 0 25 50 75 100 125
JUNCTION TEMPERATURE (°C)
3754 G17
Minimum ON and OFF Times
vs Junction Temperature
250
CGATE = 3300pF
225
200
MINIMUM ON-TIME
175
MINIMUM OFF-TIME
150
125
100
–50
–25 0 25 50 75 100 125
JUNCTION TEMPERATURE (°C)
3754 G20
Overvoltage Protection (OVP)
Level vs Junction Temperature
70
60
OVPSET = 1.0V
50
40
30
20
OVPSET = 0.22V
10
0
–50 –25 0 25 50 75 100 125
JUNCTION TEMPERATURE (°C)
3754 G18
GATE Rise/Fall Times
vs GATE Capacitance
120
VIN = 8V, INTVCC = 7V, RT = 523k
100
80
FALL TIME
60
RISE TIME
40
20
0
0
5
10
15
20
CGATE (nF)
3754 G21
3754fc
7
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