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LT3754 датащи(PDF) 3 Page - Linear Technology

номер детали LT3754
подробное описание детали  16-Channel 횞 50mA LED Driver
PDF  28 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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LT3754
3
3754f
ELECTRICAL CHARACTERISTICS
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
INPUT BIAS, REFERENCE
Minimum Operational VIN (To Allow GATE Switching)
VC = 1.5V
VIN = INTVCC (Shorted)
VIN ≠ INTVCC
l
l
4.2
5.5
4.5
6.0
V
V
Operational VIN
VIN = INTVCC (Shorted)
VIN ≠ INTVCC
4.5
6
14
40
V
V
VIN Quiescent Current
CTRL = 0.1V, PWM = 0V
CTRL = 0.1V, PWM = 1.5V, (Not Switching)
LED1–16 = 1.2V
4.2
9.5
5.7
12
mA
mA
VIN Shutdown Current (VIN ≠ INTVCC) (Not Shorted)
SHDN/UVLO = 0V, VIN =6V
SHDN/UVLO = 0V, VIN = 40V
0.1
2
10
μA
μA
VIN Shutdown Current (VIN = INTVCC (Shorted))
SHDN/UVLO = 0V, VIN = INTVCC = 4.5V
SHDN/UVLO = 0V, VIN = INTVCC = 13V
10
20
20
40
μA
μA
SHDN/UVLO Threshold (Micropower) (Falling) (VSD)IVIN < 20μA
l
0.3
0.7
V
SHDN/UVLO Threshold (UVLO) (Falling)
(Stop Switching) (VUV)
l
1.414
1.476
1.538
V
SHDN/UVLO Pin Current
SHDN/UVLO = VUV - 50mV
SHDN/UVLO = VUV + 50mV
l
1.6
2.4
0
3.2
μA
μA
VREF Voltage
IVREF = 0μA
l
1.450
1.485
1.524
V
VREF Line Regulation
IVREF = 0μA, 6V < VIN < 40V
0.01
0.05
%/V
VREF Load Regulation
0 < IVREF < 150μA (Max)
2
mV
OSCILLATOR
Frequency: fOSC (100kHz)
RT = 523k
l
92
101
112
kHz
Frequency: fOSC (1MHz)
RT = 39.2k
l
0.90
1
1.10
MHz
fOSC (1MHz) Line Regulation
RT = 39.2k, 6V < VIN < 40V
0.1
0.2
%/V
RT Pin Voltage
RT = 39.2k
1.6
V
Minimum Off-Time
Minimum On-Time
(Note 5)
(Note 5)
170
190
250
250
nS
nS
SYNC Input High Threshold
2.2
V
SYNC Input Low Threshold
0.6
V
SYNC Input Current
SYNC = 0V
SYNC = 5V
0
25
μA
μA
SYNC Frequency Range
RT = 523k
RT = 39.2k
0.12
1.2
1.5
1.5
MHz
MHz
LINEAR REGULATOR (INTVCC)
INTVCC Regulation Voltage
VIN = 12V
6.65
7
7.35
V
Dropout (VIN − INTVCC)
IINTVCC = 10mA
250
mV
INTVCC UVLO (+)
(Start Switching)
3.8
V
INTVCC UVLO (−)
(Stop Switching)
3.4
V
INTVCC Current Limit
l
44
57
mA
OVP/ LED ERROR AMPLIFIERS
Transconductance (OVP)
ΔIVC = ±2.5μA
4
μmhos
Voltage Gain (OVP)
5V/V
Transconductance (LED)
ΔIVC = ±2.5μA
33
μmhos
The
l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = VOUT = 6V, RISET = 14.7k unless otherwise noted.



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