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LT3474 Datasheet(PDF) 11 Page - Analog Devices

Part # LT3474
Description  40VIN, 75VOUT LED Controllers
PDF  28 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

LT3474 Datasheet(HTML) 11 Page - Analog Devices

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LT3755/LT3755-1/LT3755-2
11
Rev. E
For more information www.analog.com
BLOCK DIAGRAM
+–
+
–
+
–
+
–
+
–
+
+
–
A1
A3
A6
+
+
–
FREQ
PROG
1.25V
SSCLAMP
1.1V
CTRL
VREF
SHDN/UVLO
ISP
ISN
Q2
150mV
50k
170k
140µA
2.1µA
CTRL
BUFFER
gm
EAMP
PWM
COMPARATOR
DRIVER
ISENSE
A4
gm
A10
A5
OVFB
COMPARATOR
1.25V
FB
SHORT-CIRCUIT
DETECT
OPTION
FOR
LT3755
AND
LT3755-2
OPTION FOR
LT3755-1
SCILMB
SCILMB
5k
PWMOUT PWM
1.25V
VIN
INTVCC
VC
+
–
A2
R
Q
S
RAMP
GENERATOR
100KHz TO 1MHz
OSCILLATOR
A8
7.15V
LDO
GATE
SENSE
37551 BD
OPENLED
GND
1.2V
FB
1.22V
2V
1.3V
RT
SYNC
SS
SHDN
A7
10µA
10µA AT
FB = 1.25V
VC
TLIM
165°C
FAULT
LOGIC
10µA
10µA AT
A1+= A1–



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