LT3755EUD-1-PBF(RevA) データシートの表示（PDF） - Linear Technology
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LT3755EUD-1-PBF Datasheet PDF : 24 Pages
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LT3755/LT3755-1
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temp-
erature range, otherwise specifications are at TA = 25°C. VIN = 24V, SHDN/UVLO = 24V, CTRL = 2V, PWM = 5V, unless otherwise noted.
PARAMETER
CONDITIONS
MIN
TYP
MAX UNITS
VIN Minimum Operating Voltage
VIN Shutdown IQ
VIN Tied to INTVCC
SHDN/UVLO = 0V, PWM = 0V
SHDN/UVLO = 1.15V, PWM = 0V
4.5
V
0.1
1
μA
5
μA
VIN Operating IQ (Not Switching)
VREF Voltage
VREF Line Regulation
SENSE Current Limit Threshold
VC = 0V, RT = 100k to GND
100μA ≤ IVREF ≤ 0μA
4.5V ≤ VIN ≤ 40V
1.4
1.7
mA
l 1.965 2.00 2.045
V
0.006
%/V
98
108
118
mV
SENSE Input Bias Current
Current Out of Pin
40
μA
SS Pull-Up Current
Current Out of Pin
8
10.5
13
μA
Error Amplifier
LED Current Sense Threshold (VISP – VISN)
FB = 0V, VISP = 48V
LED Current Sense Threshold at CTRL = 0V (VISP – VISN) CTRL = 0V, FB = 0V, VISP = 48V
CTRL Threshold Linear Programming Range
l 96
100
103
mV
–13
–10
–8
mV
0
1.1
V
CTRL Input Bias Current
Current Out of Pin
50
100
nA
LED Current Sense Amplifier Input Common Mode
Range (VISP)
ISP/ISN Short-Circuit Threshold (VISP – VISN)
ISP/ISN Short-Circuit Fault Sensing Common Mode
Range (VISN)
ISP/ISN Input Bias Current
LED Current Sense Amplifier gm
VC Output Impedance
VC Standby Input Bias Current
VISN = 0V
PWM = 5V (Active), VISP = 48V
PWM = 0V (Standby), VISP = 48V
VISP – VISN = 100mV
1V < VVC < 2V
PWM = 0V
2.9
75
V
115
150
200
mV
0
3
V
50
μA
0
0.1
μA
120
μS
15000
kΩ
–20
20
nA
FB Regulation Voltage (VFB)
FB Amplifier gm
FB Pin Input Bias Current
FB Open LED Threshold
VISP = VISN
FB = VFB, VISP = VISN
Current Out of Pin
OPENLED Falling (LT3755 Only)
1.232 1.250 1.265
V
l 1.220 1.250 1.270
V
480
μS
40
100
nA
VFB
VFB
VFB
V
– 60mV – 50mV – 40mV
FB Overvoltage Threshold
PWMOUT Falling
VFB
VFB
VFB
V
+ 50mV + 60mV + 70mV
VC Current Mode Gain – ΔVVC/ΔVSENSE
Oscillator
4
V/V
Switching Frequency
Minimum Off-Time
RT = 100k
RT = 10k
l 90
105
125
kHz
925 1000 1050
kHz
170
ns
37551fa
3
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