DC1930A - Schematic

5
4
3
2
1
* SEE DEMO MANUAL
PVIN
E1
PVIN
3.3V - 36V
D
*
J1
BANANA JACK
+
C1
C2
10uF
50V
1210
C4
56uF,50V
50HVT56M
SGND
C24
10uF
50V
1210
C25
10uF
50V
1210
+
C5
OPT
5
6
7
8
R1
R33
0
Q1
Q2
BSC035N04LS G
4
0
1
2
3
J2
BANANA JACK
SGND
E14
10
R25
143K
(300kHz)
C28
1nF
R18
309K
C29
1nF
R19
309K
PWM_OUT1
FAULT
PWM_OUT2
PWM_OUT3
SS
RT
LED_ISP
R29
0
B
D5
1
J3
J4
J5
VEE
C13
OPT
E5
1
31
ISN
SYNC
FB
13
+
2
R30
0
LED_ISN
4
2
8
7
5
6
4
Q6
Si7234DP
2
8
7
5
6
LED+
LED+
LED+
4
LED1-
LED2-
LED3-
Q4
Q7
Si7234DP
Si7234DP
21
J6
R12
0
R13
0
27
PWM1
25
PWM2
23
PWM3
D3-1
BAT54A
J7
C
J8
5
6
7
8
8
7
5
6
22
C17
OPT
PWM3
28
R17
309K
14
ISP
D2
OPT
DI123
24
PWM2
VC3
R23
100K
D4-1
BAT54A
1
4
PWM1
Q8
BSC010N04LS
R14
4.02K
PWM2
4
Q9
BSC010N04LS
17
PWM3
R27
1K
16
C19
1nF
4
Q10
BSC010N04LS
15
18
R22
100K
PWM1
VC2
R21
100K
VF NEG
VC1
C18 10nF
R20
100K
11
CTRL3
19
82.5K
2
CTRL2
VEE
R16
R36
0
20
E7
4
32
CTRL1
VEE
SYNC
3
5
6
7
8
9
C15
OPT
1
2
3
E13
+
D4-2
BAT54A
3
2
5
6
7
8
8
BAT54A
C10
OPT
E3
C9
10uF
1206
C16
470uF
1
2
3
7
E12
2
C12
470uF
1
2
3
E11
PWM1
+
3 D3-2
C11
470uF
3
5
LED+
KRL6432
3
4
E10
744355182
3
2
VEE
1nF
CTRL2
C27
1nF
29
BG
E6
R5
0.003
CTRLT
37
C26
CTRL1
6
35
C
OPT
VEE
R9
33
R7
100K
VEE
R10
100K
100K
30
Q3 Q5
BSC026N04LS
VREF
26
R6
100K
R8
C14
2.2uF
L1
0.82uH
C8
22uF
6.3V
0805
EN/UVLO
SW
3
34
3
E4
INTVCC
1
2
1
EN/UVLO
PWM3
VIN
0805
E8
C6
0.22uF
1
36
SGND
TG
E16
PWM2
0
D1
PMEG4002EB
BOOST
U1
LT3744EUHE
12
SGND
CTRL3
R4
E9
C7
1uF
50V
1
R3
100K
SGND
E15
1
2
3
R2
OPT
SGND
5
6
7
8
VIN
E2
1
D
R32
0.005
KRL6432
R31
0
C21
C22
C23
33nF
33nF
33nF
B
SBR1A40S3
NOTE: UNLESS OTHERWISE SPECIFIED
1. ALL RESISTORS ARE 0603.
ALL CAPACITORS ARE 0603.
A
A
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.
TECHNOLOGY
TITLE: SCHEMATIC
SIZE
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
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1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
N/A
DATE:
HIGH CURRENT SYNCHRONOUS
INVERTING BUCK-BOOST LED DRIVER
IC NO.
LT3744EUHE
DEMO CIRCUIT 1930A
SHEET
Thursday, August 27, 2015
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