DC1552A - Schematic

5
4
3
2
1
REVISION HISTORY
ECO
REV
DESCRIPTION
APPROVED
DATE
__
2
PRODUCTION
KEITH S.
5/20/11
D
D
P1
B
U9
LT3990EMSE
6
4
14
3
5
7
10
12
15
VIN
SW
L50
33uH
LPS6225-333ML
9
C27
0.22uF
16V
0603
EN/UVLO
PG
BOOST
NC
NC
NC
NC
NC
NC
BD
FB
FB
GND
VIN
GND
LED7+
LED7LED5+
LED5LED35+
LED35LED33+
LED33LED47LED47+
LED45LED45+
LED11LED11+
LED9LED9+
LED15+
LED15LED13+
LED13LED43+
LED43LED41+
LED41LED40LED40+
LED38LED38+
LED4LED4+
LED2LED2+
LED24+
LED24LED22+
LED22LED20+
LED20LED18+
LED18LED32LED32+
LED30LED30+
LED28LED28+
LED26LED26+
8
99
97
95
93
91
89
87
85
83
81
79
77
75
73
71
69
67
65
63
61
59
57
55
53
51
49
47
45
43
41
39
37
35
33
31
29
27
25
23
21
19
17
15
13
11
9
7
5
3
1
RT
11
13
VCC
R2
1.00M
1%
0402
C28
22pF
0402
C29
22uF
6.3V
0805
C
1
2
16
R3
576k
1%
0402
R5
374k
1%
0402
(400kHz)
17
C
100
98
96
94
92
90
88
86
84
82
80
78
76
74
72
70
68
66
64
62
60
58
56
54
52
50
48
46
44
42
40
38
36
34
32
30
28
26
24
22
20
18
16
14
12
10
8
6
4
2
LED8+
LED8LED6+
LED6LED36+
LED36LED34+
LED34LED48LED48+
LED46LED46+
LED12LED12+
LED10LED10+
LED16+
LED16LED14+
LED14LED44+
LED44LED42+
LED42LED39LED39+
LED37LED37+
LED3LED3+
LED1LED1+
LED23+
LED23LED21+
LED21LED19+
LED19LED17+
LED17LED31LED31+
LED29LED29+
LED27LED27+
LED25LED25+
B
NOTES: UNLESS OTHERWISE SPECIFIED
1. ALL RESISTORS ARE 0603, ALL CAPACITOR ARE 0805.
TSW-150-07-L-D
LED1 TO LED48
UP TO 30V
CUSTOMER NOTICE
APPROVALS
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES.
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APP ENG.
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
A
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
4
3
TECHNOLOGY
JW
KEITH S.
TITLE: SCHEMATIC
48-CHANNEL LED DRIVER WITH PWM GENERATOR AND SERIAL INTERFACE
SIZE
IC NO.
N/A
SCALE = NONE
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
DATE:
LT8500EUHH / LT3595AEUHH
DEMO CIRCUIT 1552A
Wednesday, August 03, 2011
2
SHEET 1
1
REV.
3
OF 5
A
5
4
PVIN
2
1
VIN
L49
10uH
C1 - C6
0.33uF
50V
3
VIN
C7
0.33uF
50V
C8 - C17
0.47uF
50V
C18
0.47uF
50V
C19
0.47uF
50V
C20
0.47uF
50V
C21
0.47uF
50V
C22
0.47uF
50V
C23
0.47uF
50V
C24
0.47uF
50V
C25
0.47uF
50V
LED32LED31LED30LED29LED28LED27LED26LED25-
R1
4.99
D
L1
100uH
L2
100uH
L3
100uH
L4
100uH
L5
100uH
L6
100uH
L7
100uH
D
L8
100uH
LED25+
LED26+
LED27+
LED28+
LED29+
LED30+
LED31+
LED32+
46
L1
5
33
45
SW1
44
L2
43
SW2
40
L3
41
SW3
38
L4
39
SW4
37
L5
36
SW5
35
L6
34
SW6
31
32
L7
SW7
29
L8
VIN
VIN
PWM25
PWM26
PWM27
PWM28
PWM29
PWM30
PWM31
PWM32
SW8
GND
GND
GND
C
47
48
49
50
25
26
27
28
30
PWM1
PWM2
PWM3
PWM4
PWM5
PWM6
PWM7
PWM8
PWM9
PWM10
PWM11
PWM12
PWM13
PWM14
PWM15
PWM16
U1
LT3595AEUHH
14
42
57
C
19
20
21
22
53
54
55
56
PWM17
PWM18
PWM19
PWM20
PWM21
PWM22
PWM23
PWM24
VCC
23
OPENLED
24
SHDN
VCC
OPENLED
VCC
SHDN
R19
33k
RSET
L16
SW16
L15
SW15
L14
SW14
L13
SW13
L12
SW12
L11
SW11
L10
SW10
1
2
3
4
7
6
9
8
10
11
12
13
16
15
L9
18
52
51
SW9
R18
49.9k
30mA
C26
10uF
10V
17
LED17+
LED18+
LED19+
LED20+
LED21+
LED22+
LED23+
LED24+
B
L16
100uH
L15
100uH
L14
100uH
L13
100uH
L12
100uH
L11
100uH
L10
100uH
B
L9
100uH
LED24LED23LED22LED21LED20LED19LED18LED17-
VIN
C32
0.47uF
50V
C33
0.47uF
50V
C34
0.47uF
50V
C35
0.47uF
50V
C36
0.47uF
50V
C37
0.47uF
50V
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.
A
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
4
3
C38
0.47uF
50V
C39
0.47uF
50V
APPROVALS
PCB DES.
JW
APP ENG.
KEITH S.
TECHNOLOGY
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
TITLE: SCHEMATIC
48-CHANNEL LED DRIVER WITH PWM GENERATOR AND SERIAL INTERFACE
SIZE
N/A
SCALE = NONE
2
DATE:
IC NO.
LT8500EUHH / LT3595AEUHH
DEMO CIRCUIT 1552A
Wednesday, August 03, 2011
SHEET 2
1
REV.
3
OF 5
A
5
4
3
2
1
VIN
VIN
C41 - C50
0.47uF
50V
C51
0.47uF
50V
C52
0.47uF
50V
C53
0.47uF
50V
C54
0.47uF
50V
C55
0.47uF
50V
C56
0.47uF
50V
C57
0.47uF
50V
C58
0.47uF
50V
LED40LED39LED38LED37LED4LED3LED2LED1-
D
L17
100uH
L18
100uH
L19
100uH
L20
100uH
L21
100uH
L22
100uH
L23
100uH
D
L24
100uH
LED1+
LED2+
LED3+
LED4+
LED37+
LED38+
LED39+
LED40+
46
L1
5
33
45
SW1
44
L2
43
SW2
40
L3
41
SW3
38
L4
39
37
SW4
L5
36
SW5
35
L6
34
SW6
31
L7
32
29
SW7
L8
30
SW8
VIN
VIN
GND
GND
GND
C
47
48
49
50
25
26
27
28
PWM1
PWM2
PWM3
PWM4
PWM37
PWM38
PWM39
PWM40
PWM1
PWM2
PWM3
PWM4
PWM5
PWM6
PWM7
PWM8
PWM9
PWM10
PWM11
PWM12
PWM13
PWM14
PWM15
PWM16
U2
LT3595AEUHH
14
42
57
C
19
20
21
22
53
54
55
56
PWM41
PWM42
PWM43
PWM44
PWM13
PWM14
PWM15
PWM16
VCC
23
OPENLED
24
SHDN
OPENLED
VCC
SHDN
RSET
L16
SW16
L15
SW15
L14
SW14
L13
SW13
L12
SW12
L11
SW11
L10
SW10
1
2
3
4
7
6
9
8
10
11
12
13
16
15
L9
52
51
SW9
18
R39
C59
10uF
10V
49.9k
30mA
17
LED41+
LED42+
LED43+
LED44+
LED13+
LED14+
LED15+
LED16+
B
L32
100uH
L31
100uH
L30
100uH
L29
100uH
L28
100uH
L27
100uH
L26
100uH
B
L25
100uH
LED16LED15LED14LED13LED44LED43LED42LED41-
VIN
C60
0.47uF
50V
C61
0.47uF
50V
C62
0.47uF
50V
C63
0.47uF
50V
C64
0.47uF
50V
C65
0.47uF
50V
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.
A
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
4
3
C66
0.47uF
50V
C67
0.47uF
50V
APPROVALS
PCB DES.
JW
APP ENG.
KEITH S.
TECHNOLOGY
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
TITLE: SCHEMATIC
48-CHANNEL LED DRIVER WITH PWM GENERATOR AND SERIAL INTERFACE
SIZE
N/A
SCALE = NONE
2
DATE:
IC NO.
LT8500EUHH / LT3595AEUHH
DEMO CIRCUIT 1552A
Wednesday, August 03, 2011
SHEET 3
1
REV.
3
OF 5
A
5
4
3
2
1
VIN
VIN
C68 - C77
0.47uF
50V
C78
0.47uF
50V
C79
0.47uF
50V
C80
0.47uF
50V
C81
0.47uF
50V
C82
0.47uF
50V
C83
0.47uF
50V
C84
0.47uF
50V
C85
0.47uF
50V
LED48LED47LED46LED45LED12LED11LED10LED9-
D
L33
100uH
L34
100uH
L35
100uH
L36
100uH
L37
100uH
L38
100uH
L39
100uH
D
L40
100uH
LED9+
LED10+
LED11+
LED12+
LED45+
LED46+
LED47+
LED48+
46
L1
5
33
45
SW1
44
L2
43
SW2
40
L3
41
SW3
38
L4
39
37
SW4
L5
36
SW5
35
L6
34
SW6
31
L7
32
29
SW7
L8
30
SW8
VIN
VIN
GND
GND
GND
C
47
48
49
50
25
26
27
28
PWM9
PWM10
PWM11
PWM12
PWM45
PWM46
PWM47
PWM48
23
OPENLED
24
SHDN
PWM1
PWM2
PWM3
PWM4
PWM5
PWM6
PWM7
PWM8
PWM9
PWM10
PWM11
PWM12
PWM13
PWM14
PWM15
PWM16
U3
LT3595AEUHH
OPENLED
VCC
SHDN
RSET
L16
SW16
L15
SW15
L14
SW14
L13
SW13
L12
SW12
L11
SW11
L10
SW10
1
2
3
4
7
6
9
8
10
11
12
13
16
15
L9
14
42
57
C
19
20
21
22
53
54
55
56
VCC
52
51
R57
49.9k
SW9
18
PWM33
PWM34
PWM35
PWM36
PWM5
PWM6
PWM7
PWM8
30mA
C86
10uF
10V
17
LED33+
LED34+
LED35+
LED36+
LED5+
LED6+
LED7+
LED8+
B
L48
100uH
L47
100uH
L46
100uH
L45
100uH
L44
100uH
L43
100uH
L42
100uH
B
L41
100uH
LED8LED7LED6LED5LED36LED35LED34LED33-
VIN
C87
0.47uF
50V
C88
0.47uF
50V
C89
0.47uF
50V
C90
0.47uF
50V
C91
0.47uF
50V
C92
0.47uF
50V
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.
A
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
4
3
C93
0.47uF
50V
C94
0.47uF
50V
APPROVALS
PCB DES.
JW
APP ENG.
KEITH S.
TECHNOLOGY
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
TITLE: SCHEMATIC
48-CHANNEL LED DRIVER WITH PWM GENERATOR AND SERIAL INTERFACE
SIZE
SCALE = NONE
2
IC NO.
N/A
LT8500EUHH / LT3595AEUHH
DEMO CIRCUIT 1552A
DATE:
Wednesday, August 03, 2011
SHEET 4
1
REV.
3
OF 5
A
5
4
3
2
R68
OPT
LDI-RTN
R61
OPT 0402
SDO-RTN
R69
0
0402
SDO-THRU
1
LDI-THRU
0402
LDI-NEXT
R62
0
0402
R71
0
D
SCKO-RTN
IN
D
OUT
0402
P3
P4
1
3
5
7
9
11
13
15
17
19
1
2
PWMCK-LAST
1
R66
24.9k
1%
0402
PVIN 40V
5
OUT
GND
SET
VCC
A2
Y2
LTC1799CS5
R72
OPT
2
SCKO-THRU
6
5
VCC
A1
VCC
GND
Y2
A2
C98
OPT NC7WZ17P6X
VIN
TSW-110-07-L-D
1
SCKO-LAST
6
2
5
VCC
3
Y1
A1
VCC
GND
4
Y2
A2
C99
OPT NC7WZ17P6X
1
LDI-LAST
C
2
3
SDO-LAST
PWM40
PWM39
28
PWM46
27
PWM47
26
PWM48
25
PWM41
24
PWM42
23
B
PWM43
22
PWM44
21
PWM37
20
PWM38
19
PWM39
18
PWM18
PWM17
17
16
PWM20
PWM19
15
PWM29
13
PWM31
PWM30
12
11
PWM25
9
8
7
57
PWM26
PWM38
PWM27
PWM3
PWM28
PWM37
PWM2
0402
29
PWM45
31
30
PWM36
PWM35
33
32
PWM34
PWM33
SDO
34
OPENLED
SCKI
35
SCKO
36
SDO
SCKI
PWMCK
38
SCKO
SDI
39
SDI
PWMCK
LDIB
40
42
PWM8
LDIBLANK
43
44
45
PWM44
PWM21
PWM2
56
PWM43
PWM4
6
55
PWM42
PWM13
5
PWM3
PWM7
54
PWM22
PWM4
PWM14
4
PWM13
53
PWM6
52
PWM5
PWM14
U4
LT8500EUHH
PWM15
PWM23
51
PWM41
PWM24
PWM15
PWM47
PWM16
3
50
PWM46
PWM48
PWM1
PWM16
C97
1uF
6.3V
OPENLED
PWM33
PWM34
PWM35
PWM36
PWM45
PWM9
2
49
PWM10
GND
PWM9
PWM11
1
PWM10
PWM12
46
PWM8
PWM7
PWM6
PWM5
PWM12
41
C96
10uF
10V
48
R64
OPT
2
4
6
8
10
12
14
16
18
20
U7 OPT
Y1
4
47
VCC
4
U6
OPT
0402
VCC
PWM11
5
2
4
6
8
10
12
14
16
18
20
4
DIV
1
2 4
3
4 6
5
6 8
7
8
TSW-104-07-L-D
B
Y1
GND
1
3
5
7
9
11
13
15
17
19
0402
37
1
3
5
7
3
V+
A1
6
NC7WZ17P6X
PVIN
P2
C
2
R65
0
14
C95
1uF
3
U8
VCC
TSW-110-07-L-D
PVIN
1
3
5
7
9
11
13
15
17
19
U5
VCC
1
3
5
7
9
11
13
15
17
19
PWM32
VIN
2
4
6
8
10
12
14
16
18
20
10
2
4
6
8
10
12
14
16
18
20
PWM1
PWM24
PWM23
PWM22
PWM21
PWM28
PWM27
PWM26
PWM25
PWM40
PWM17
PWM18
PWM19
PWM20
PWM29
PWM30
PWM31
PWM32
CUSTOMER NOTICE
A
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.
APPROVALS
PCB DES.
JW
APP ENG.
KEITH S.
TECHNOLOGY
TITLE: SCHEMATIC
48-CHANNEL LED DRIVER WITH PWM GENERATOR AND SERIAL INTERFACE
SIZE
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
4
3
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
SCALE = NONE
2
DATE:
IC NO.
LT8500EUHH / LT3595AEUHH
DEMO CIRCUIT 1552A
Wednesday, August 03, 2011
SHEET 5
1
REV.
3
OF 5
A
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