MC34844AEP Freescale Semiconductor, MC34844AEP Datasheet - Page 27

• 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
3.12
3.10
3.08
3.06
3.04
3.02
3.00
2.98
VOUT
VOUT
INDUCTOR
INDUCTOR
CURRENT
CURRENT
COMP
COMP
15
Figure 13. Bias Current vs Input Voltage (Sleep Mode)
16
17
18
19
Figure 14. Boost Soft Start
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21
Vin, volts
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23
24
25
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Vin=24V
Vin=24V
Load=16 LEDs, 50mA/channel
Load=16 LEDs, 50mA/channel
VLED = 47V, ±1V
VLED = 47V, ±1V
I2C Mode
SM_Bus Mode
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28
Analog Integrated Circuit Device Data
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30
Freescale Semiconductor