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LT3952 Datasheet(PDF) 29 Page - Linear Technology

Part # LT3952
Description  60V LED Driver with 4A Switch Current
PDF  32 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT3952 Datasheet(HTML) 29 Page - Linear Technology

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LT3952
29
3952fb
For more information www.linear.com/LT3952
TYPICAL APPLICATIONS
3MHz Buck-Boost LED Driver with Internal PWM Dimming and Fade Start
IVINP
LT3952
VIN
VC
SHORTLED
OPENLED
SHORTLED
OPENLED
SYNC/SPRD
INTVCC
TG
ISN
ISP
FB
GND
INTVCC
0.75
EN/UVLO
PWM
OVLO
CTRL
VREF
DIM
IVINCOMP
RT
SS
2.2µF
3952 TA05a
100nF
1µF
100V
1µF
10nF
25.5k
3MHz
21.5k
1M
31.6k
100k
100k
75k
INTVCC
1M
2.4k
D1: VISHAY VS-10BQ060
L1: WURTH WE-LHMI74437346025
M1: VISHAY Si7309DN
IVINN
15m
L1
2.5µH
SW
4.7µF
VIN
5V TO 35V
42V TRANSIENT
39V OVLO RISING
2.2µF
0.25s FADE
39nF
130Hz
8 LED
333mA
D1
4.7µF
50V
57V LIMIT
DIM (V)
0
3952 TA05c
2.5
2
1
0.5
1.5
PWM DUTY CYCLE
EFFICIENCY
VIN = 12V
100
60
20
80
40
0
VIN (V)
0
3952 TA05b
35
30
20
10
5
15
25
100
90
70
80
60
PWM Duty Cycle and Efficiency vs DIM Voltage
Efficiency vs Input Voltage
Power On – Fade Start
3952 TA05d
PWM
1V/DIV
VIN
10V/DIV
VLED
10V/DIV
ILED
200mA/DIV
40ms/DIV



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