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Номер в каталоге
Компоненты Описание
LT3759(RevB) Просмотр технического описания (PDF) - Linear Technology
Номер в каталоге
Компоненты Описание
производитель
LT3759
(Rev.:RevB)
Wide Input Voltage Range Boost/SEPIC/Inverting Controller
Linear Technology
LT3759 Datasheet PDF : 32 Pages
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LT3759
BLOCK DIAGRAM
V
IN
R4 R3
+
C
IN
L1
C
DC
D1
L2
t
FBX
R2
+
C
OUT1
C
OUT2
R1
V
OUT
2.5V
I
S3
VC
1
C
C2
R
C
C
C1
1.72V
–
A11
+
G6
–
A12
–0.86V
+
FBX
FBX 2
PGOOD
6
1.6V
+
A1
–
+
A2
–0.8V
–
Q4
G8
1.52V
–
A13
+
G7
–
A14
–0.76V
+
FREQUENCY
FOLDBACK
12
EN/UVLO
I
S1
2μA
11
V
IN
A10
1.22V
2.5V
I
S2
10μA
Q3
BANDGAP
REFERENCE
BG
INTERNAL BIAS
GENERATOR
BG_LOW
G4
UVLO
INTERNAL BIAS
A8
TSD
~165˚C
V
C
–
+
A7
G5
Q2
PWM
COMPARATOR
CURRENT
LIMIT
V
IN
LDO
1.2V
SR1
RQ
S
A15
2.7V
SLOPE
V
ISENSE
RAMP
RAMP
GENERATOR
100kHz ~ 1MHz
OSCILLATOR
–
1.25V
+
A3
G1
FREQ
FOLDBACK
1.25V
+
+
A4
Q1
–
FREQ
PROG
SS
3
C
SS
SYNC
5
RT
4
R
T
10
DRIVE
CURRENT
LIMIT
DRIVE LDO
INTV
CC
9
C
VCC
DRIVER
GATE
G2
8
M1
50mV
A6
SENSE
7
A5
GND
13
R
SENSE
3759 F01
Figure 1. LT3759 Block Diagram Working as a SEPIC Converter
3759fb
8
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