MC34844AEP Freescale Semiconductor, MC34844AEP Datasheet - Page 40

• 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 11. Static and Dynamic Electrical Characteristics (continued)
40
34844A
OVER-VOLTAGE PROTECTION
BOOST
Notes
ELECTRICAL CHARACTERISTICS
STATIC AND DYNAMIC ELECTRICAL CHARACTERISTICS
Over-voltage Clamp - OVP Register Table:
OVP = Fh (Default)
OVP = Eh
OVP = Dh
OVP = Ch
OVP = Bh
OVP = Ah
OVP = 9h
OVP = 8h
OVP = 7h
OVP = 6h
OVP = 5h
Over-voltage threshold,
Set by Hardware, Voltage at A0/SEN
A0/SEN Sink Current, T
Switching Frequency (BST [1:0]=0)
Switching Frequency (BST [1:0]=1) (Default)
Switching Frequency (BST [1:0]=2)
Switching Frequency (BST [1:0]=3)
Boost Switching Frequency
Minimum Duty Cycle
Maximum Duty Cycle
Soft Start Period
Boost Switch Rise Time
Boost Switch Fall Time
23.
Characteristics noted under conditions V
-40°C ≤ T
Guaranteed by design
A
≤ 105°C, PGND = 0 V, unless otherwise noted.
(23)
A
(23)
=25°C
Characteristic
IN
= 12 V, V
OUT
= 42 V, PWM = VDC1, M/~S = VDC1, PIN & NIN = VDC1,
I
SINK_OVP
Symbol
OVP
OVP
OVP
OVP
OVP
OVP
OVP
OVP
OVP
OVP
OVP
OVP
D
D
f
f
f
f
SW0
SW1
SW2
SW3
fsw
t
t
MAX
MIN
SS
TR
t
F
HW
EH
DH
CH
BH
AH
FH
9H
8H
7H
6H
5H
60.5
56.5
30.5
6.15
0.14
0.29
0.59
1.17
0.29
Min
53
49
45
41
38
34
26
23
70
80
-
-
-
-
Analog Integrated Circuit Device Data
62.5
0.16
0.32
0.65
1.30
0.32
Typ
100
6.5
6.5
58
54
51
47
43
39
36
32
28
24
10
85
15
25
Freescale Semiconductor
Max
64.5
52.5
48.5
44.5
40.5
37.5
33.5
6.85
0.18
0.35
0.72
1.42
0.35
130
60
56
30
25
15
-
-
-
-
MHz
MHz
MHz
MHz
MHz
Unit
μA
ms
ns
ns
%
%
V
V
V
V
V
V
V
V
V
V
V
V