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LT3756 Datasheet(PDF) 28 Page - Analog Devices

Part # LT3756
Description  60VIN/120VOUT Dual LED Controller with Exponential PWM and Scalable Dimming
PDF  31 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

LT3756 Datasheet(HTML) 28 Page - Analog Devices

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LT8355-1
28
Rev. A
For more information www.analog.com
TYPICAL APPLICATIONS
Boost LED Driver as Pre-boost for Buck-Mode LED Driver
Efficiency vs VIN Voltage
25:1 External PWM Dimming at 100Hz
VIN (V)
8
12
16
20
24
28
32
36
82
84
86
88
90
92
94
83551 TA06b
VIN = 12V
100µs/DIV
PWM2 PIN
5V/DIV
INDUCTOR L1
5A/DIV
VBOOST
10V/DIV
BOOST LED CURRENT
500mA/DIV
BUCK LED CURRENT
1A/DIV
8355-1 TA06c
LED-2
LED-2
D1
500m
M3
84.5k
499k
22µH
L1
10µF
147k
0.33nF
56k
D2
250m
M4
10k
M1
M2
715k
10k
100k
Q1
324k
6.8nF
4.7
10nF
10µF
10µF
VBOOST
L2
47µH
3.3µF
20k
VIN
8V TO 36V
GATE1
SENSEN1
PWM2
VREF
RT
0.5A
f = 250kHz
LT8355-1
SENSEP1
ISP1
ISN1
PWMTG1
VIN
EN/UVLO
FB2
ISN2
ISN1
ISN2
ISN1
ISP2
ISP2
CHANNEL 2
DIMMING
GATE2
SENSEN2
1A
ISP2
ISN2
PWMTG2
35W
LED
ARRAY
GND
35W
LED
ARRAY
SENSEP2
FB1
VC1
VC2
L1: COILCRAFT XAL1510-223MEB
L2: WURTH 74435574700
M1: INFINEON BSC160N10NS3-G
M2: VISHAY Si7810DN
M3: VISHAY Si7113DN
M4: VISHAY Si3437DV
D1: DIODES INC SBR12U120P5
D2: DIODES INC PDS5100H
100V
100V
100V
100V
8355-1 TA06a
×2
ISP1
ISP1
10nF
50m
ILIM = 2A
9m
ILIM = 11A
2.2µF
INTVCC
FAULT1
CTRL1
IADJ2
PWM1
CTRL2
FAULT2
100k
100k



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