MC34844AEP Freescale Semiconductor, MC34844AEP Datasheet - Page 12

• 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

Table 4. Static and Dynamic Electrical Characteristics (continued)
PIN & NIN = VDC1, - 40°C ≤ T
Analog Integrated Circuit Device Data
Freescale Semiconductor
OVER-VOLTAGE PROTECTION
BOOST
Notes
Over-voltage Clamp - OVP Register Table:
OVP = Fh
OVP = Eh
OVP = Dh
OVP = Ch
OVP = Bh
OVP = Ah
OVP = 9h
OVP = 8h
OVP = 7h
OVP = 6h
OVP = 5h
OVP = 4h
OVP = 3h
OVP = 2h
Over-voltage threshold,
A0/SEN Sink Current
Switching Frequency (BST [1:0]=0)
Switching Frequency (BST [1:0]=1)
Switching Frequency (BST [1:0]=2)
Switching Frequency (BST [1:0]=3)
Minimum Duty Cycle
Maximum Duty Cycle
Soft Start Period
Boost Switch Rise Time
Boost Switch Fall Time
11.
Characteristics noted under conditions V
Set by Hardware, Voltage at A0/SEN
Guaranteed by design
(10)
(10)
Characteristic
A
≤ 105°C, PGND = 0 V, unless otherwise noted.
IN
= 12 V, V
OUT
= 42 V, I
LED
I
SINK_OVP
Symbol
OVP
OVP
OVP
OVP
OVP
OVP
OVP
OVP
OVP
OVP
OVP
OVP
OVP
OVP
OVP
D
D
f
f
f
f
= 50 mA, PWM = VDC1, M/~S = VDC1,
SW0
SW1
SW2
SW3
t
t
STATIC AND DYNAMIC ELECTRICAL CHARACTERISTICS
MAX
MIN
SS
TR
t
F
HW
EH
DH
CH
BH
AH
FH
9H
8H
7H
6H
5H
4H
3H
2H
60.5
56.5
30.5
6.15
0.14
0.27
0.54
1.08
Min
53
49
45
41
38
34
26
23
19
15
11
80
-
-
-
-
-
ELECTRICAL CHARACTERISTICS
62.5
0.15
0.30
0.60
Typ
100
6.5
1.2
6.5
58
54
51
47
43
39
36
32
28
24
20
16
12
10
85
15
25
Max
64.5
52.5
48.5
44.5
40.5
37.5
33.5
6.85
0.17
0.33
0.66
1.32
60
56
30
25
21
17
13
15
-
-
-
-
-
MHz
MHz
MHz
MHz
Unit
μA
ms
ns
ns
%
%
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
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