Circuit Descriptions
7.
Figure 7-32 LED driver
The Overvoltage Protection Circuit is built around item no.
7B50, 7B51, 7C20 and 7C22 (diagram AL1B). Refer to figure
7-33 Overvoltage Protection Circuit
.
Figure 7-33 Overvoltage Protection Circuit
For the component placement on the LED PWD, refer to
.
1
8
770_217_100126.ep
s
100126
OUT
12
11
G
S
CLK
IREF
MODE
S
CLK
S
IN
S
OUT
XERR
XHALF
XLAT
10
NC
9
8
VCC
0
1
2
3
4
5
6
7
BLANK
1
3
14
15
GND
GND_H
S
VIA
VIA
VIA
VIA
2K0
3
B
3
1
FB20
3
B21
150R
+
3
V
3
+
3
V
3
25
3
2
FB
3
5
9
10
11
14
15
1
2
2
3
27
22
5
16
17
1
8
19
20
21
6
7
8
3
1
3
0
33
24
26
3
12
1
3
2
8
29
4
TLC5946RHB
7B26-1
100n
2B11
3
6
150R
3
B00-
3
2B04-4
100p
45
3
6
3
7
38
3
9
40
41
42
7B26-2
TLC5946RHB
3
4
3
5
3
B1
8
1K
8
1
8
150R
3
B00-1
+
3
V
3
1
8
2B04-1
100p
150R
3
B00-4
4
5
150R
3
B00-2
2
7
2B04-2
100p
27
3
6
2B04-
3
100p
10K
3
B22
BLANK
S
PI-DATA-IN-BUF
PWM-G1
PWM-R1
PWM-G
3
PWM-R
3
PWM-R2
PWM-B2
PWM-G2
DATA-
S
WITCH
PWM-G4
PWM-R4
PWM-B4
PWM-R5
PWM-G5
PWM-B5
LATCH
S
PI-DATA-IN
S
PI-DATA-OUT
PWM-CLOCK-BUF
S
PI-CLOCK-BUF
PROG
PWM-B1
PWM-B
3
1
8
770_21
8
_100126.ep
s
100126
BLUE
GREEN
RED
BLUE
GREEN
RED
BLUE
GREEN
RED
BLUE
GREEN
RED
BLUE
GREEN
RED
BLUE
GREEN
RED
FB
3
2
6
5
2
1
4
3
99-2
3
5/R
S
BB7C-A24/2D
7005
1
8
10K
3
B07-1
FB
3
0
3
B07-
3
10K
3
6
4
5
FB
3
1
10K
3
B1
3
-4
1
4
3
7002
99-2
3
5/R
S
BB7C-A24/2D
6
5
2
6
5
2
1
4
3
6
7004
99-2
3
5/R
S
BB7C-A24/2D
3
B0
3
-
3
1K5
3
27
3
B07-2
10K
+24V
100n
2B0
3
2
7
1K5
3
B0
3
-2
3
B
3
6
270R
+24V
2
6
1
BC
8
47B
S
(COL)
7B2
3
-1
3
B
3
5
270R
3
B
3
7
6
8
R
5
3
4
BC
8
47B
S
(COL)
7B2
3
-2
7B25
BC
8
47BW
1
3
2
3
6
3
B1
3
-
3
10K
6
5
2
1
4
3
7001
99-2
3
5/R
S
BB7C-A24/2D
4
5
1K5
3
B0
3
-4
4
5
10K
3
B07-4
700
3
6
5
2
1
4
3
99-2
3
5/R
S
BB7C-A24/2D
1
8
3
B0
3
-1
1K5
+24V
4
3
99-2
3
5/R
S
BB7C-A24/2D
7000
6
5
2
1
+24V
PWM-R1
PWM-G1
PWM-B1