MC34844AEP Freescale Semiconductor, MC34844AEP Datasheet - Page 28

• 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

Analog Integrated Circuit Device Data
Freescale Semiconductor
Figure 16. Typical Operation Waveforms for FPWM=600 Hz, 100% Duty
Figure 15. Typical Operation Waveforms for FPWM=600 Hz, 40% Duty
(ac coupled)
(ac coupled)
INDUCTOR
INDUCTOR
CURRENT
CURRENT
VOUT
VOUT
ILED, CH1
ILED, CH1
SWA
SWA
SWB
SWB
VCH1
VOUT
(ac coupled)
INDUCTOR
CURRENT
ILED, CH1
ISET=40mA (all channels)
FPWM=600Hz, 40% duty
ISET=50mA (all channels)
ISET=50mA (all channels)
FPWM=600Hz, 100% duty
FPWM=600Hz, 100% duty
TYPICAL PERFORMANCE CURVES (TA=25°C)
Precharge
FUNCTIONAL DEVICE OPERATION
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