MC34844AEP Freescale Semiconductor, MC34844AEP Datasheet - Page 25

• 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

FUNCTIONAL DEVICE OPERATION
TYPICAL PERFORMANCE CURVES (TA=25°C)
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34844
50.50
50.45
50.40
50.35
50.30
50.25
50.20
50.15
50.10
50.05
50.00
95%
94%
93%
92%
91%
90%
89%
88%
87%
86%
85%
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10
TYPICAL PERFORMANCE CURVES (T
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12
Figure 9. Boost efficiency vs Input Voltage
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Figure 10. Line Regulation, V
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14
19
16
20
18
21
Vin, volts
Vin, volts
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20
Fs = 600KHz
L=22uH, DCR=52mO
Schottky V12P10-E3/86A
C
FPWM=600Hz, 100% duty
Load = 16 LEDs, 50mA/channel
V
23
OUT
LED
IN
22
= 48V, ±1V /channel
= 2x4.7µF, 2x2.2µF/100V
24
Fs = 600KHz
L=22uH, DCR=52mO
Schottky V12P10-E3/86A
C
FPWM=600Hz, 100% duty
Load = 16 LEDs, 50mA/channel
V
Changing
OUT
LED
25
= 48V, ±1V /channel
= 2x4.7µF, 2x2.2µF/100V
24
A
=25°C)
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26
27
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Analog Integrated Circuit Device Data
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Freescale Semiconductor