LT3519EMS-1 查看數據表（PDF） - Linear Technology
零件编号
产品描述 (功能)
生产厂家
LT3519EMS-1 Datasheet PDF : 20 Pages
| |||
LT3519/LT3519-1/LT3519-2
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full
operating temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, SHDN/UVLO = 12V, CTRL = 2V, PWM = 5V,
unless otherwise noted.
PARAMETER
Switching Frequency
Maximum Duty Cycle
Switch Current Limit
Switch VCESAT
Switch Leakage Current
CTRL for Full-Scale LED Current
CTRL Pin Bias Current
PWM Input High Voltage
PWM Input Low Voltage
PWM Pin Resistance to GND
FB Regulation Voltage (VFB)
FB Pin Threshold Voltage for OPENLED Falling
FB Pin Bias Current
ISP, ISN Idle Input Bias Current
ISP, ISN Active Input Bias Current
Schottky Forward Drop
Schottky Leakage Current
SHDN/UVLO Threshold Voltage Falling
SHDN/UVLO Input Low Voltage
SHDN/UVLO Pin Bias Current Low
SHDN/UVLO Pin Bias Current High
VREF Output Voltage
VREF Output Pin Regulation
OPENLED Output Low (VOL)
OPENLED Leakage Current
CONDITIONS
400kHz (LT3519)
1MHz (LT3519-1)
2.2MHz (LT3519-2)
400kHz (LT3519)
1MHz (LT3519-1)
2.2MHz (LT3519-2)
ISW = 500mA
SW = 45V, PWM = 0V
Current Out of Pin, CTRL = 0.1V
Current Out of Pin, FB = 1V
PWM = 0V, ISP = ISN = 24V
ISP = ISN = 24V, Current per Pin
ISCHOTTKY = 500mA
CATHODE = 24V, ANODE = 0V
IVIN Drops Below 1μA
SHDN/UVLO = 1.15V
SHDN/UVLO = 1.30V
–100μA ≤ IVREF ≤ 0μA
3V < VIN < 40V
IOPENLED = 1mA
FB = 0V, OPENLED = 40V
MIN
TYP
MAX
l
320
400
440
l 0.80
1
1.10
l
1.9
2.2
2.4
l
94
97
l
86
93
l
72
83
l
750
980
1150
300
2
1.2
50
100
l
1.5
l
0.8
70
l 1.190
1.220
1.250
VFB – 70mV VFB – 60mV VFB – 50mV
60
120
1
17
0.8
4
l 1.180
1.220
1.270
0.4
1.8
2.2
2.6
10
100
l 1.96
2
2.04
0.04
240
1
UNITS
kHz
MHz
MHz
%
%
%
mA
mV
μA
V
nA
V
V
kΩ
V
V
nA
μA
μA
V
μA
V
V
μA
nA
V
%/V
mV
μA
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2. The LT3519E/LT3519E-1/LT3519E-2 are guaranteed to meet
specified performance from 0°C to 125°C junction temperature range.
Specifications over the –40°C to 125°C operating junction temperature
range are assured by design, characterization and correlation with
statistical process controls. The LT3519I/LT3519I-1/LT3519I-2 are
guaranteed to meet performance specifications over the –40°C to 125°C
operating junction temperature range.
Note 3. Absolute maximum voltage at VIN and OPENLED is 40V for
nonrepetitive one second transients and 30V for continuous operation.
Note 4. For VIN below 6V, the SHDN/UVLO pin must not exceed VIN for
proper operation.
3519fa
3
Share Link: 