MC34844AEP Freescale Semiconductor, MC34844AEP Datasheet - Page 9

• 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
PIN & NIN = VDC1, - 40°C ≤ T
SUPPLY
BOOST
Notes
Supply Voltage
Supply Current when Shutdown Mode
Supply Current when Sleep Mode
Supply Current when Operational Mode
Under-voltage Lockout
Under-voltage Hysteresis
VDC1 Voltage
VDC2 Voltage
VDC3 Voltage
Output Voltage Range
Boost Switch Current Limit
RDSON of Internal FET
Boost Switch Off-state Leakage Current
Peak Boost Efficiency
Characteristics noted under conditions V
6.
7.
8.
ELECTRICAL CHARACTERISTICS
STATIC AND DYNAMIC ELECTRICAL CHARACTERISTICS
9
34844
Manual & SM Bus: EN = Low, SCK & SDA=Low
I
SM-Bus: EN = low, SCK & SDA= Active, SETI2C bit = 0, EN bit = 0
I
Manual: EN= High, SCK & SDA=Low, PWM=Low
SM-Bus: EN= Low, SCK & SDA=Active, EN bit= 1, PWM=Low
I
V
V
C
C
C
VIN = 7.0 V
VIN = 28 V
I
V
2
2
2
DRAIN
IN
IN
SWA,SWB
C: EN = Low, SETI
C: EN = High, SETI
C: EN = High, SETI
VDC1
VDC2
VDC3
This output is for internal use only and not to be used for other purposes
Minimum and Maximum output voltages are dependent on Min/Max duty cycle condition.
Guaranteed by design
Rising
Falling
= 1.0 A
= 2.2 μF
= 2.2 μF
= 2.2 μF
= 65 V
(6)
(6)
(6)
(8)
(7)
2
2
2
C bit = 1, CLRI
C bit = 1, CLRI
C bit = 1, CLRI
Characteristic
STATIC AND DYNAMIC ELECTRICAL CHARACTERISTICS
A
≤ 105°C, PGND = 0 V, unless otherwise noted.
2
2
2
C bit = 0, EN bit = 1, PWM=Low
C bit = 0
C bit = 0, EN bit = 0
IN
= 12 V, V
OUT
= 42 V, I
I
LED
I
OPERATIONAL
I
BOOST_LEAK
UVLO
EFF
SHUTDOWN
Symbol
R
I
V
V
UVLO
SLEEP
V
V
V
I
DSON
= 50 mA, PWM = VDC1, M/~S = VDC1,
V
OUT1
OUT2
FET
DC1
DC2
DC3
BOOST
IN
HYST
Min
150
7.0
5.4
2.4
5.5
2.4
8.0
2.3
31
-
-
-
-
-
-
-
Analog Integrated Circuit Device Data
10.0
Typ
200
250
2.0
3.0
6.0
2.5
6.0
2.5
2.5
12
17
90
-
-
-
Freescale Semiconductor
Max
250
500
6.4
2.6
6.5
2.6
2.7
28
43
60
10
-
-
-
-
-
Unit
mΩ
μ
mA
mA
mV
μ
%
V
V
V
V
V
V
A
A
A