MC34844AEP Freescale Semiconductor, MC34844AEP Datasheet - Page 51

• 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
Table 14. Register Description
Register Name
FPWM[17:0]
DPWM[7:0]
CHEN[9:0]
PWR_OFF
ICHG[7:0]
ALL_OFF
PWR_ON
ICH#[7:0]
CLRFAIL
BST[1:0]
Default Value
(Hex)
3FF
300
FF
FF
FF
0
0
0
0
2
Table 15. Over-voltage Protection
PWM Frequency
PWM Duty Cycle (FFh =100%)
Channel Enable (0=off, 1=on)
All 10 channels OFF at the same. In order to reactivate channels this bit should be clear.
Clear fail if channels are re-enable.
POWER OFF LED channels (0=disable, 1=enable)
POWER ON LED channels (0=disable, 1=enable)
Boost Frequency (160,320,650,1300 kHz) [0h=160 Hz]
Channel Current Program (FFh = Maximum Current)
Global Current Program
Register (hex)
A
B
C
D
E
2
3
4
5
6
7
8
9
F
OVP Value (vOLTS)
Description
11
15
19
23
27
31
35
39
43
47
51
55
59
62
LOGIC COMMANDS AND REGISTERS
FUNCTIONAL DEVICE OPERATION
34844A
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