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LT3795 Просмотр технического описания (PDF) - Linear Technology
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LT3795
110V LED Controller with Spread Spectrum Frequency Modulation
Linear Technology
LT3795 Datasheet PDF : 30 Pages
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Block Diagram
LT3795
EN/UVLO
–
A1
1.22V
+
3µA
FB
V
C
SHDN
1.25V
–
A2
gm
+
10µA AT
FB = 1.25V
ISMON
ISP
ISN
CTRL1
CTRL2
1.5V
–
SHORT-CIRCUIT
DETECT
A4
SCILM
×
1
+
+
A5
×
4
–
100mV
– +
V
LED
–
1.1V
+
+
+
gm
EAMP
10µA AT
A6
+
= A6
–
A6
2.5V
10µA
IVINP
R1
10µA AT
1.2V
+
A8 IVINCOMP
= 1.2V
gm
–
IVINN
R2 = R1
IVINCOMP
–
A11
+
5.5V
R3 = R1
×
20
PWM
THERMAL
SHDN
SS
2.5V
28µA
SHORTLED
TGOFFB
FAULTB
SS AND
LOGIC
SCILM
A16
EN
1mA
VINOV OVFB
FB
INTV
CC
SCILM
0.3V
FB
+
A21
2.8µA
OVLO
A17
+
1.25V
–
1.3V
–
OVFB
COMPARATOR
INTV
CC
100µA
A18
2.015V
V
REF
SS
TG
PWM
ISP
ISP-7V
1.25V
–
LDO
A3
+
V
IN
7.7V
INTV
CC
TGOFFB
+
FAULTB
A7
–
PWM
COMPARATOR
RQ
S
DRIVER
I
LIM
A9
GATE
113mV
RAMP
GENERATOR
100kHz TO 1MHz
OSCILLATOR
I
SENSE
A10
SENSE
GND
OPENLED
1.20V
–
A14
A7
FB
+
V
LED
200mV
–
A15
A7
+
C/10 COMPARATOR
WITH 200mV
HYSTERESIS
INTV
CC
12µA
12µA
2V
–
AA719
+
–
AA720
1V
+
PWM
RT RAMP
S
R
Q
3796 BD
For more information
www.linear.com/LT3795
3795fb
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