MC34844AEP Freescale Semiconductor, MC34844AEP Datasheet - Page 53

• 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
47uF
47uF
47uF
47uF
VIN = 24V
VIN = 24V
* FOR I2C MODE - SETI2C bit should be set High.
* FOR SM-BUS MODE - EN pin should be connected to
* FOR I2C MODE - SETI2C bit should be set High.
* FOR SM-BUS MODE - EN pin should be connected to
+
+
Conditons: V
+
+
Conditons: V
0
0
10uF
10uF
CONTROL UNIT
10uF
10uF
CONTROL UNIT
2.2uF
2.2uF
A0SEN_Master
2.2uF
2.2uF
A0SEN_Slave
0
0
EN_Master
EN_Slave
2.2uF
2.2uF
2.2uF
2.2uF
SCK
SDA
SCK
SDA
2.2uF
2.2uF
2.2uF
2.2uF
IN
IN
= 24 V, V
= 24 V, V
0
0
5.6K
5.6K
5.6K
5.6K
100pF
100pF
GND or taken low by the Control Unit.
100pF
100pF
GND or taken low by the Control Unit.
MASTER CK
4700pF
4700pF
4700pF
4700pF
MASTER CK
ISET = 60mA
OUT
OUT
ISET = 60mA
0
0
0
0
0
4.64K
4.64K
= 47 V, Load = 16S10P, I
= 47 V, Load = 16S10P, I
4.64K
4.64K
100K
100K
VDC1
100K
100K
VDC1
I2C MODE (Master Mode)
VDC1
VDC1
I2C MODE (Slave Mode)
INPUT
VDC1
Figure 29. I
OUTPUT
Figure 30. I
28
31
23
29
22
24
25
27
26
30
19
20
21
1
7
6
28
31
23
29
22
24
25
27
26
30
19
20
21
1
7
6
VIN
VDC1
VDC2
VDC3
COMP
SLOPE
CK
EN
PWM
SCK
SDA
A0/SEN
M/~S
ISET
PIN
NIN
U9
U9
VIN
VDC1
VDC2
VDC3
COMP
SLOPE
CK
EN
PWM
SCK
SDA
A0/SEN
M/~S
ISET
PIN
NIN
U11
U11
1
2
1
47uH
47uH
MC34844A
MC34844A
2
C (Master Mode)
47uH
47uH
MC34844A
MC34844A
C (Slave Mode)
PGNDA
PGNDB
2
VOUT
PGNDA
PGNDB
SWA
SWB
GND
FAIL
2
VOUT
SWA
SWB
FAIL
GND
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
LED
LED
4
3
32
5
2
18
8
9
10
11
12
13
14
15
16
17
33
0
= 60 mA, OVP = 53V, f
= 60 mA, OVP = 53V, f
2
3.3K
3.3K
0
2
3.3K
3.3K
D533
D533
D553
D553
VCC
1
VCC
1
30uF
30uF
VOUT
30uF
30uF
VOUT
+
+
0
4.7uF
4.7uF
+
+
0
4.7uF
4.7uF
LED MATRIX (16S10P)
220pF
220pF
LED MATRIX (16S10P)
220pF
220pF
220pF
220pF
220pF
220pF
220pF
220pF
220pF
220pF
220pF
220pF
SW
SW
220pF
220pF
220pF
220pF
220pF
220pF
220pF
220pF
= 300 kHz
= 300 kHz
0
220pF
220pF
TYPICAL APPLICATIONS
220pF
220pF
0
220pF
220pF
220pF
220pF
220pF
220pF
220pF
220pF
220pF
220pF
220pF
220pF
220pF
220pF
34844A
53