MC34844AEP Freescale Semiconductor, MC34844AEP Datasheet - Page 41

• 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)
Analog Integrated Circuit Device Data
Freescale Semiconductor
PWM GENERATOR
PWM PIN (DIRECT PWM CONTROL)
PHASE LOCK LOOP
I
LOGIC OUTPUT (CK)
LED CHANNELS
Notes
2
PWM Frequency Range
M/~S = Low (Slave Mode)
PWM Frequency
M/~S = High (Master Mode)
PWM dimming resolution
Input PWM Pin Minimum Pulse
Input PWM Frequency Range
CK Slave Mode Frequency Lock Range
M/~S = Low (Slave Mode)
CK Slave Mode Input Jitter
M/~S = Low (Slave Mode)
Slave Mode Acquisition Time
M/~S = Low (Slave Mode)
FPWM
FPWM
CK Frequency (Master Mode)
Interface Frequency Range
SM Bus Power-on-Reset Time
SM Bus Shut down mode Timeout
Output fall time
10 ρF < C
Output rise time
10 ρF<C
Output Rise and Fall time
C
Channels Rise and Fall Time
C/SM BUS PHYSICAL LAYER [SCK, SDA]
24.
25.
Characteristics noted under conditions V
-40°C ≤ T
L
<100 ρF
FPWM Register = 768
FPWM Register = 192,000
FPWM Register = 768
FPWM Register = 192,000
Special considerations should be made for frequencies between 110 Hz to 1.0 KHz. Please refer to
further details.
Guaranteed by design
S
S
=27 kHz
=110 Hz
L
<400 ρF
L
< 400 ρF
A
≤ 105°C, PGND = 0 V, unless otherwise noted.
(25)
(25)
(25)
(25)
Characteristic
(25)
(25)
(24)
IN
= 12 V, V
OUT
= 42 V, PWM = VDC1, M/~S = VDC1, PIN & NIN = VDC1,
fCK
fCK
tshutdown
Symbol
t
fPWM
fPWM
T
PWM_IN
fPWM
t
fCK
S_JITTER
S_ACQ
fPWM
f
t
t
t
MASTER
SCK
R
R
RST
STATIC AND DYNAMIC ELECTRICAL CHARACTERISTICS
t
t
R
F
/t
/t
F
F
S
M
S
25000
25000
Min
110
103
150
110
110
103
40
20
-
-
-
-
-
-
-
-
ELECTRICAL CHARACTERISTICS
27000
27000
Functional Device Operation
2000
0.39
Typ
110
110
100
50
30
25
23
-
-
-
-
-
-
-
27000
29000
27000
27000
29000
Max
112
112
400
160
0.1
80
50
-
-
-
-
-
-
-
Unit
kHz
Hz
Hz
Hz
Hz
ms
ms
Hz
ms
ms
ns
ns
ns
ns
ns
%
%
34844A
for
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