DC986A - Schematic

1
2
PVIN
TP9
1
2
2
L3
15uH
Sumida
CDRH3D14/HP-150M
R21
10k
0.2
Q4
SI2303BDS
2
3
LED2+
LED2+
TP11
LED2-
LED2-
C6
0.1uF
R11
(OPT)
D2
RB160M-60TR
TP12
L2
15uH
Sumida
CDRH3D14/HP-150M
LED2-
R23
2
R13
LED2+
TG2 17
SW2 20
27 PWM3
TP10
TP14
1
59K
OVP2 11
Q3
MMBT3906T
PVIN
6 FADJ
VREF
1
FADJ
2.1MHz
ADJUST
C3
1000PF
R12
0
C4
1000PF
R14
0
2
C5
1
3
JP2
R15
0
CAP1 15
LED1 14
9 VC1
TG1 13
SW1 16
8 VC2
7 VC3
R2
0.2
Q2
SI2303BDS
2
3
LED1+
LED1+
TP3
LED1-
LED1-
TP4
C2
0.1uF
R17
10k
D1
RB160M-60TR
L1
15uH
Sumida
CDRH3D14/HP-150M
LED1+
R1
(OPT)
OVP1 12
LED1-
R22
1
59K
Q1
MMBT3906T
3
3
R18
100K
Frequency
Adjust
2
1000PF
A
2
PWM3
CAP2 19
LED2 18
1 PWM1
28 PWM2
TP8
Q5
MMBT3906T
1
PWM2
1
PVIN
3 CTRL3
TP7
LED3-
R24
59K
2
PWM1
LED3D3
RB160M-60TR
OVP3 10
5 CTRL1
4 CTRL2
TP6
TP13
LED3-
1
CTRL3
LED3+
LED3+
C8
0.1uF
3
3
CTRL2
0.2
TG3 24
SW3 21
C7
0.1uF
TP5
R20
Q6
SI2303BDS
2
3
1
VREF
R3
10K
CAP3 22
LED3 23
26 SHDN
2 VREF
PVIN
2
1
25 VIN
SHDN
R4
R5
R6
R7
R8
R9
100K 100K 100K 100K 100K 100K
CTRL1
LT3496EUFD
R19
(OPT)
GND
1
U1
JP1
LED3+
TP2
LEDs
2
C1
1uF
50V
TP16
VIN
ON
OFF
C10
4.7uF
63V
(OPT)
3
1
2
C9
1uF
6.3V
29 GND
A
VIN
1
GND
TP15
+
VIN
3V-5.5V
PVIN
45V Max
TP1
R10
10k
B
B
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
1
CONTRACT NO.
APPROVALS
DRAWN
DATE
HELEN
8/03/06
Walker Bai
8/03/06
CHECKED
TECHNOLOGY
TITLE
LT3496EUFD, Triple Step-Down LED Driver
APPROVED
ENGINEER
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
DESIGNER
Wednesday, April 18, 2007
2
SIZE
CAGE CODE
SCALE:
FILENAME:
DWG NO
REV
A
DC986A
SHEET
1
OF
1
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