LT3755 LINER [Linear Technology], LT3755 Datasheet - Page 3

• Manufacturer Part Number: LT3755
• Description: 40VIN, 75VOUT LED Controller
• Manufacturer: LINER [Linear Technology]

ELECTRICAL CHARACTERISTICS
PARAMETER
V
V
V
V
V
SENSE Current Limit Threshold
SENSE Input Bias Current
SS Pull-Up Current
Error Amplifi er
LED Current Sense Threshold (V
LED Current Sense Threshold at CTRL = 0V (V
CTRL Threshold Linear Programming Range
CTRL Input Bias Current
LED Current Sense Amplifi er Input Common Mode
Range (V
ISP/ISN Short-Circuit Threshold (V
ISP/ISN Short-Circuit Fault Sensing Common Mode
Range (V
ISP/ISN Input Bias Current
LED Current Sense Amplifi er g
VC Output Impedance
VC Standby Input Bias Current
FB Regulation Voltage (V
FB Amplifi er g
FB Pin Input Bias Current
FB Open LED Threshold
FB Overvoltage Threshold
VC Current Mode Gain – ΔV
Oscillator
Switching Frequency
Minimum Off-Time
erature range, otherwise specifi cations are at T
IN
IN
IN
REF
REF
Minimum Operating Voltage
Shutdown I
Operating I
Voltage
Line Regulation
ISP
ISN
)
)
m
Q
Q
(Not Switching)
FB
)
VC
/ΔV
m
ISP
SENSE
ISP
– V
– V
ISN
ISN
)
)
ISP
– V
ISN
A
) CTRL = 0V, FB = 0V, V
= 25°C. V
CONDITIONS
V
SHDN/UVLO = 0V, PWM = 0V
SHDN/UVLO = 1.15V, PWM = 0V
VC = 0V, RT = 100k to GND
100μA ≤ I
4.5V ≤ V
Current Out of Pin
Current Out of Pin
FB = 0V, V
Current Out of Pin
V
PWM = 5V (Active), V
PWM = 0V (Standby), V
V
1V < V
PWM = 0V
V
FB = V
Current Out of Pin
OPENLED Falling (LT3755 Only)
PWMOUT Falling
R
R
IN
ISN
ISP
ISP
T
T
= 100k
= 10k
Tied to INTV
– V
= V
= 0V
VC
FB
ISN
ISN
IN
IN
, V
The
< 2V
VREF
ISP
≤ 40V
= 24V, SHDN/UVLO = 24V, CTRL = 2V, PWM = 5V, unless otherwise noted.
ISP
= 100mV
= 48V
l
≤ 0μA
= V
CC
denotes the specifi cations which apply over the full operating temp-
ISN
ISP
ISP
ISP
= 48V
= 48V
= 48V
l
l
l
l
LT3755/LT3755-1
– 60mV
+ 50mV
1.965
1.232
1.220
MIN
–13
115
–20
925
2.9
V
V
98
96
90
0
8
0
FB
FB
– 50mV
+ 60mV
15000
0.006
1.250
1.250
1000
2.00
10.5
TYP
108
100
–10
150
120
480
105
170
V
V
0.1
1.4
40
50
50
40
0
4
FB
FB
– 40mV
+ 70mV
2.045
1.265
1.270
1050
MAX
118
103
100
200
100
125
V
V
4.5
1.7
1.1
0.1
13
–8
75
20
1
5
3
FB
FB
UNITS
37551fa
3
%/V
kHz
kHz
V/V
mA
mV
mV
mV
mV
kΩ
μA
μA
μA
μA
nA
μA
μA
μS
nA
μS
nA
ns
V
V
V
V
V
V
V
V
V