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34844 Datasheet(PDF) 28 Page - Freescale Semiconductor, Inc

Part # 34844
Description  10 Channel LED Backlight Driver with Integrated Power Supply
PDF  37 Pages
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Manufacturer  FREESCALE [Freescale Semiconductor, Inc]
Direct Link  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

34844 Datasheet(HTML) 28 Page - Freescale Semiconductor, Inc

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Analog Integrated Circuit Device Data
28
Freescale Semiconductor
34844
TYPICAL APPLICATIONS
LOGIC COMMANDS AND REGISTERS
TYPICAL APPLICATIONS
Figure 15. Manual Mode (Single Wire Control)
Figure 16. Manual Mode (Two Wire Control)
Figure 17. SM-Bus Mode
VIN = 24V
0
0
0
VOUT
0
0
0
0
VDC1
VDC1
VCC
0
VOUT
VDC1
Master CK
LED MATRIX (16S10P)
MANUAL MODE (Single Wire Control)
Output
OVP = 55V
5.6K
5.6K
+
47uF
+
47uF
2.2uF
2.2uF
3.3K
3.3K
20K
20K
309K
309K
5.1K
5.1K
+
13.8uF
+
13.8uF
150K
150K
1.8nF
1.8nF
U1
34844
U1
34844
VIN
1
VDC1
28
COMP
29
EN
7
CK
24
M/~S
30
PWM
25
SCK
27
SDA
26
A0/SEN
6
ISET
19
PIN
20
NIN
21
SWA
4
SWB
3
VOUT 32
PGNDA 5
PGNDB 2
VDC2
31
FAIL 18
I0 8
I1 9
I2 10
I3 11
I4 12
I5 13
I6 14
I7 15
I8 16
I9 17
VDC3
23
SLOPE
22
GND 33
56pF
56pF
CLK
CLK
D1
D1
2
1
2.2uF
2.2uF
22uH
22uH
1
2
2.2uF
2.2uF
VIN = 24V
0
0
0
0
VCC
VOUT
VOUT
0
VDC1
VDC1
0
0
0
Master CK Output
LED MATRIX (16S10P)
OVP = 55V
MANUAL MODE (Two Wire Control)
Unit
Control
EN
PWM
2.2uF
2.2uF
D5
D5
2
1
22uH
22uH
1
2
1.8nF
1.8nF
2.2uF
2.2uF
3.3K
3.3K
150K
150K
+
13.8uF
+
13.8uF
U2
34844
U2
34844
VIN
1
VDC1
28
COMP
29
EN
7
CK
24
M/~S
30
PWM
25
SCK
27
SDA
26
A0/SEN
6
ISET
19
PIN
20
NIN
21
SWA
4
SWB
3
VOUT 32
PGNDA 5
PGNDB 2
VDC2
31
FAIL 18
I0 8
I1 9
I2 10
I3 11
I4 12
I5 13
I6 14
I7 15
I8 16
I9 17
VDC3
23
SLOPE
22
GND 33
2.2uF
2.2uF
20K
20K
5.1K
5.1K
5.6K
5.6K
56pF
56pF
+
47uF
+
47uF
309K
309K
VIN = 24V
0
0
0
0
VCC
VOUT
0
VDC1
VDC1
0
0
VDC1
0
Master CK
LED MATRIX (16S10P)
Unit
Control
SCK
SDA
+
47uF
+
47uF
309K
309K
2.2uF
2.2uF
D8
D8
2
1
22uH
22uH
1
2
1.8nF
1.8nF
2.2uF
2.2uF
3.3K
3.3K
+
13.8uF
+
13.8uF
U3
34844
U3
34844
VIN
1
VDC1
28
COMP
29
EN
7
CK
24
M/~S
30
PWM
25
SCK
27
SDA
26
A0/SEN
6
ISET
19
PIN
20
NIN
21
SWA
4
SWB
3
VOUT 32
PGNDA 5
PGNDB 2
VDC2
31
FAIL 18
I0 8
I1 9
I2 10
I3 11
I4 12
I5 13
I6 14
I7 15
I8 16
I9 17
VDC3
23
SLOPE
22
GND 33
2.2uF
2.2uF
5.1K
5.1K
5.6K
5.6K
56pF
56pF



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