MC34844AEP Freescale Semiconductor, MC34844AEP Datasheet - Page 13

• 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
PWM GENERATOR
PWM PIN (DIRECT PWM CONTROL)
PHASE LOCK LOOP
I
LOGIC OUTPUT (CK)
LED CHANNELS
Notes
2
PWM Frequency Range
PWM Frequency
PWM dimming resolution
Input PWM Pin Minimum Pulse
Input PWM Frequency Range
CK Slave Mode Frequency Lock Range
CK Slave Mode Input Jitter
Slave Mode Acquisition Time
CK Frequency (Master Mode)
Interface Frequency Range
SM Bus Power-on-Reset Time
Output fall time
Output rise time
Output Rise and Fall time
Channels Rise and Fall Time
C/SM BUS PHYSICAL LAYER [SCK, SDA]
12.
13.
Characteristics noted under conditions V
ELECTRICAL CHARACTERISTICS
STATIC AND DYNAMIC ELECTRICAL CHARACTERISTICS
13
34844
M/~S = Low (Slave Mode)
M/~S = High (Master Mode)
M/~S = Low (Slave Mode)
M/~S = Low (Slave Mode)
M/~S = Low (Slave Mode)
FPWM
FPWM
10 ρF < C
10 ρF<C
C
FPWM Register = 768
FPWM Register = 192,000
FPWM Register = 768
FPWM Register = 192,000
L
<100 ρF
Special considerations should be made for frequencies between 100 Hz to 1.0 KHz. Please refer to
further details.
Guaranteed by design
S
S
=25 kHz
=100 Hz
L
<400 ρF
L
< 400 ρF
(13)
(12)
(13)
Characteristic
(13)
(13)
A
≤ 105°C, PGND = 0 V, unless otherwise noted.
(12)
IN
= 12 V, V
OUT
= 42 V, I
LED
fCK
fCK
Symbol
t
fPWM
fPWM
T
PWM_IN
fPWM
t
fCK
S_JITTER
S_ACQ
fPWM
f
t
t
t
MASTER
= 50 mA, PWM = VDC1, M/~S = VDC1,
SCK
R
R
RST
t
t
R
F
/t
/t
F
F
S
M
S
22500
22500
Min
100
150
100
100
90
90
40
20
-
-
-
-
-
-
-
Analog Integrated Circuit Device Data
25000
25000
Functional Device Operation
2000
0.39
Typ
100
100
23
-
-
-
-
-
-
-
-
-
-
Freescale Semiconductor
25000
27500
23000
25000
27500
Max
110
110
400
100
160
0.1
50
80
25
50
-
-
-
Unit
kHz
Hz
Hz
Hz
Hz
ms
ms
Hz
ms
ns
ns
ns
ns
ns
%
%
for