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LTC3452 Datasheet(PDF) 7 Page - Linear Technology

Part # LTC3452
Description  Synchronous Buck-Boost MAIN/CAMERA White LED Driver
PDF  16 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3452 Datasheet(HTML) 7 Page - Linear Technology

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7
LTC3452
3452f
BLOCK DIAGRA
1MHz
OSCILLATOR
–
+
–
+
–
+
–
+
–
+
–
+
LOGIC
GATE
DRIVERS
AND
ANTI-CROSS-
CONDUCTION
AB PWM
COMPARATOR
CD PWM
COMPARATOR
1600mA
200mA
FORWARD
CURRENT
LIMIT
REVERSE
CURRENT
LIMIT
18
21
UV
UV
OT
VIN
2.7V TO 5.5V
VC
VIN
PVIN
VOUT
SW1
SW2
20
1
19
17
UNDERVOLTAGE
LOCKOUT
OT
OVERTEMPERATURE
PROTECTION
1.23V
VBIAS
800mV
SDL
1.23V
1.23V
BANDGAP
REFERENCE
15
SWITCH
A
SWITCH
B
SWITCH
D
SWITCH
C
LED
DETECT
4
LEDL1
VOUT
LOW
POWER
LED
BANK
HIGH
POWER
LED
BANK
LED
DETECT
5
LEDL2
LED
DETECT
6
LEDL3
LED
DETECT
7
LEDL4
LED
DETECT
8
LEDL5
LED
DETECT
10
LEDH1
LED
DETECT
12
LEDH2
SOFT-START
CLAMP
EXPONENTIAL
BRIGHTNESS
CONTROL
VOUT
327k
123k
IMAXL
256
16
MAIN
ERROR AMP
LOW POWER
LED CURRENT
SETTING AMP
SAFETY
ERROR AMP
3
RISETL
VFB
PGND
11
GND
9
GND
EXPOSED
PAD
ISETL
ENL
ENH
3452 BD
–
+
800mV
SDH
HIGH POWER
LED CURRENT
SETTING AMP
RISETH
ISETH
–
+
IMAXH
768
SHUTDOWN
CIRCUIT
2
14
13
SDL
8 LEVELS
SDH
SHUTDOWN



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