MC34844AEP Freescale Semiconductor, MC34844AEP Datasheet - Page 30

• Manufacturer Part Number: MC34844AEP
• Description: IC LED DVR BACKLIGHT 10CH 32QFN
• Manufacturer: Freescale Semiconductor

Specifications of MC34844AEP

• Constant Current: Yes
• Internal Driver: Yes
• Type - Primary: Backlight
• Mounting Type: Surface Mount
• Topology: PWM, Step-Up (Boost)
• Number Of Outputs: 10
• Frequency: Adjustable/Selectable
• Voltage - Supply: 7 V ~ 28 V
• Voltage - Output: 60V
• Package / Case: 32-VFQFN Exposed Pad
• Operating Temperature: -40°C ~ 105°C
• Operating Supply Voltage: 7 V to 28 V
• Maximum Supply Current: 10 mA
• Maximum Power Dissipation: 3.9 W
• Maximum Operating Temperature: + 105 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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