LT3492 데이터 시트보기 (PDF) - Linear Technology
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LT3492 Datasheet PDF : 20 Pages
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LT3492
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 5V, SHDN = 5V, PWM1-3 = 5V, FADJ = 0.5V, CTRL1-3 = 1.5V,
OVP1-3 = 0V, unless otherwise noted.
PARAMETER
VIN Operation Voltage
VIN Undervoltage Lockout
Full-Scale LED Current Sense Voltage
CONDITIONS
(Note 4)
ISP1-3 = 48V
One-Tenth Scale LED Current Sense Voltage
ISPn/ISNn Operating Voltage
VREF Output Voltage
VREF Line Regulation
Quiescent Current in Shutdown
Quiescent Current Idle
Quiescent Current Active (Not Switching)
Switching Frequency
Maximum Duty Cycle
CTRL1-3 Input Bias Current
FADJ Input Bias Current
OVP1-3 Input Bias Current
OVP1-3 Threshold
VC1-3 Idle Input Bias Current
VC1-3 Output Impedance
EAMP gm (ΔIVC/ΔVCAP-LED)
SW1-3 Current Limit
SW1-3 VCESAT
SW1-3 Leakage Current
ISP1-3 Input Bias Current
ISP1-3, ISN1-3 Idle Input Bias Current
ISP1-3, ISN1-3 Input Bias Current in Shutdown
CTRL1-3 = 100mV, ISP1-3 = 48V
IREF = 200μA, Current Out of Pin
3V ≤ VIN ≤ 40V, IREF = 10μA
SHDN = 0V
PWM1-PWM3 = 0V
VC1-VC3 = 0V
FADJ = 1.5V
FADJ = 0.5V
FADJ = 0.1V
FADJ = 1.5V (2.1MHz)
FADJ = 0.5V (1.3MHz)
FADJ = 0.1V (330kHz)
Current Out of Pin, CTRL1-3 = 0.1V
Current Out of Pin, FADJ = 0.1V
Current Out of Pin, OVP1-3 = 0.1V
PWM1-3 = 0V
ISP1-3 = 48V
ISP1-3 = 48V
(Note 3)
ISW = 500mA (Note 3)
SHDN = 0V, SW = 5V
PWM1-3 = 0V
SHDN = 0V
MIN TYP MAX UNITS
3
30
V
2.1
2.4
V
98
100
103
mV
l 96
104
mV
7
10
13
mV
2.5
60
V
l 1.96
2
2.04
V
0.03
%/V
0.1
10
μA
6
8
mA
11
15
mA
1800 2100 2400
kHz
1000 1300 1600
kHz
280
340
400
kHz
73
78
%
80
87
%
97
%
20
100
nA
20
100
nA
10
100
nA
0.95
1
1.05
V
–20
0
20
nA
10
MΩ
200
μS
600 1000 1300
mA
340
mV
2
μA
180
250
μA
1
μA
1
μA
3492f
3
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