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LT3754 датащи(PDF) 3 Page - Linear Technology

номер детали LT3754
подробное описание детали  60V Triple Step-Down LED Driver Programmable Temperature Protection
PDF  24 Pages
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производитель  LINER [Linear Technology]
домашняя страница  http://www.linear.com
Logo LINER - Linear Technology

LT3754 датащи(HTML) 3 Page - Linear Technology

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LT3597
3
3597f
ELECTRICAL CHARACTERISTICS
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VIN Operating Voltage
l
6
55
V
Quiescent Current from VIN
EN/UVLO = 0.4V
BIAS = 5V, Not Switching
BIAS = 0V, Not Switching
2.1
4
2
4
6
µA
mA
mA
Minimum BIAS Voltage
3
3.1
V
Quiescent Current from BIAS
EN/UVLO = 0.4V
BIAS = 5V, Not Switching
BIAS = 0V, Not Switching, Current Out of Pin
2
60
2
3
150
µA
mA
µA
EN Threshold (Falling)
0.4
0.7
V
UVLO Threshold (Falling)
1.47
1.51
1.53
V
EN/UVLO Pin Current (Hysteresis)
EN/UVLO = 1.6V
EN/UVLO = 1.4V
4
10
5.1
6
nA
µA
FB1-3 Regulation Voltage
1.15
1.22
1.25
V
FB1-3 Pin Bias Current
FB = 6V
200
nA
Maximum Duty Cycle
RT = 220k (200kHz)
RT = 33.2k (1MHz)
90
78
95
85
%
%
Switch Saturation Voltage
ISW1-3 = 100mA
265
mV
Switch Current Limit
400
510
700
mA
DA Pin Current to Stop OSC
225
280
350
mA
Switch Leakage
VSW1-3 = 0V
700
nA
BST1-3 Pin Current
ISW1-3 = 100mA
2
mA
Switching Frequency
RT = 220k
RT = 33.2k
170
900
200
1000
230
1100
kHz
kHz
SYNC Input Low
0.4
V
SYNC Input High
1.6
V
SYNC Frequency Range
RT = 220k
RT = 47k
240
1000
kHz
kHz
SYNC Pin Bias Current
VSYNC = 3.3V
200
nA
Soft-Start Time
(Note 4)
2.5
ms
VREF Voltage
IVREF = 0µA
l
1.96
2.0
2.04
V
Maximum VREF Current
200
µA
ISET1-3 Pin Voltage
RISET1-3 = 20k, VCTRL = VCTRLM = TSET = 1.5V
1.0
V
TSET Voltage for LED Current Derating
540
mV
TSET Pin Leakage Current
VTSET = 1.0V
200
nA
ILED1-3 LED Current
RISET1-3 = 20k
l
98
97
100
100
102
103
mA
mA
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 24V, BOOST = 29V, BIAS = 5V, EN/UVLO = 5V, PWM1-3 = 3.3V,
CTRL1-3 = CTRLM = TSET = 2.0V, VOUT1-3 = 24V, SYNC = 0V, unless otherwise specified. (Note 2)



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