LX1744CPW Microsemi Analog Mixed Signal Group, LX1744CPW Datasheet - Page 12

• Manufacturer Part Number: LX1744CPW
• Description: IC LED DRVR WT/CLR BCKLT 14TSSOP
• Manufacturer: Microsemi Analog Mixed Signal Group
• Type: Backlight, White LED, Color LEDr

Specifications of LX1744CPW

• Constant Current: Yes
• Topology: PWM, Step-Up (Boost)
• Number Of Outputs: 2
• Internal Driver: Both
• Type - Primary: Backlight
• Type - Secondary: Color, White LED
• Voltage - Supply: 1.6 V ~ 6 V
• Voltage - Output: 25V
• Mounting Type: Surface Mount
• Package / Case: 14-TSSOP
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 100mA
• Internal Switch(s): Yes
• Efficiency: 90%
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Frequency: -

Copyright © 2000
Rev. 1.1b, 2005-03-01
Notes
R11, R12, R13
LED1, LED2,
LED3, LED4
CR1, CR2,
CR3, CR4
C10, C12
R9, R10
1.
C2, C7
C3, C4
C5, C6
C8, C9
R1, R3
R2, R6
R7, R8
L1, L2
Note: All pins are referenced to ground.
I N T E G R A T E D
C11
Ref
Q1
C1
R4
R5
U1
Jumper
Use these locations to insert additional input and/or output capacitance.
J1
J2
J3
J4
CAPACITOR, 4.7 µ F, 1210, 6.3V
CAPACITOR, 4.7 µ F, 1210, 35V
CAPACITOR, 1000pF, 0805, 35V
CAPACITOR, (SPARE), See Note 1
CAPACITOR, 1 µ F, 0805, 35V
CAPACITOR, 0.1 µ F, 0805, 6.3V
CAPACITOR, 2.2 µ F, 0805, 16V
Microsemi UPS5819, SCHOTTKY, 1A, 40V, POWERMITE
Microsemi UPWLEDxx, LED, Optomite
INDUCTOR, 47 µ H, 480mA, SMT
FDV303N MOSFET, 30V, SOT-23
RESISTOR, 1M, 1/16W, 0805
RESISTOR, 75K, 1/16W, 0805
RESISTOR, 1K, 1/16W, 0805
RESISTOR, 15, 1/16W, 0805
RESISTOR, 100K, POT, 1/16W, 0805
RESISTOR, 100K, 1/16W, 0805
RESISTOR, 10K, 1/16W, 0805
Microsemi LX1744CPW BOOST CONTROLLER
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: [phone]
Position
N/A
N/A
N/A
N/A
P R O D U C T S
Table 4: Factory Installed Component List
Table 3: Jumper Position Assignments
Close to adjust LED current with on-board potentiometer.
Close to adjust VLCD with on-board potentiometer.
Remove the factory installed jumper and insert a 4~6cm wire loop
(optional) to observe the inductor current waveform using a current
probe.
Remove jumper to test open-circuit over-voltage protection implemented
with R1 and R2
E V A L U A T I O N B O A R D
Integrated Products Division
Microsemi
Dual Output Boost – LED Driver / LCD Bias
Part Description
Function
P
RODUCTION
D
ATASHEET
LX1744
Page 12