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LTC6930 Datasheet(PDF) 30 Page - Analog Devices

Part # LTC6930
Description  Voltage-Controlled Pulse Width Modulator (PWM)
PDF  34 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

LTC6930 Datasheet(HTML) 30 Page - Analog Devices

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LTC6992-1/LTC6992-2/
LTC6992-3/LTC6992-4
30
Rev. D
For more information www.analog.com
TYPICAL APPLICATIONS
Wide Range LED Dimming (0 to 85000 Cd/m2 Brightness)
6992 TA13
LTC6992-4
MOD
GND
SET
OUT
V+
DIV
RDIV1
1M
RDIV2
280k
5V
5V
LT6004
RSET1
61.9k
5V
LT6004
R3
10k
VREF
VFAST
R4
7.5k
VDIMMING
0V TO 1.65V
VSLOW
R2
7.5k
R1
10k
5–100%
NDIV = 64
f = 12.6kHz
0–100%
NDIV = 4096
fOUT = 100Hz
SLOW PWM
CONTROLS 0 TO 6000
Cd/m2 BRIGHTNESS
FAST PWM
CONTROLS 6000 TO 85000
Cd/m2 BRIGHTNESS
C4
0.1µF
LTC6992-1
MOD
GND
SET
OUT
V+
DIV
RDIV3
1M
RDIV4
681k
5V
3.3V
5V
RSET2
124k
C1
0.1µF
3.3VIN
PVIN
PWM
A1
D1
D2
LUMILEDS LXHL-BW02
LT3518UF
LED+
0.1µF
Isolated PWM (5% to 95%) Controller
6992 TA14
LTC6992-2
MOD
GND
SET
OUT
V+
DIV
LT1011
LT1636
CONCEPT DESIGN USING SIMPLE R-C FILTERING FOR PWM CONTROL.
NOT OPTIMIZED FOR OFFSETS.
T1: PCA EPF8119S ETHERNET TRANSFORMER
R2
100k
V+
R10
499k
R15
10k
1kHz
SOURCE
PWM
R14
10k
R1
10k
100kHz
INTERMEDIATE PWM
R9
20k
L1
C1
1µF
0.1µF
L2
LTC6992-2
MOD
GND
SET
OUT
V+
DIV
LT1011
LT1636
R4
10k
ISOV+
ISOV+
ISOV+
R11
787k
R12
1M
ISOPWM
R13
280k
R3
1k
R6
4.99k
1kHz
ISOLATED PWM
ISOLATION
BARRIER
T1
R8
10k
C3
1000pF
R7
1k
C2
0.1µF
R17
10k
R18
100k
R16
100k
•
•
V+
R5
20k
C4
1µF
0.1µF
0.1µF
0.1µF
0.1µF
0.1µF



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