LX1745CPW Microsemi Analog Mixed Signal Group, LX1745CPW Datasheet - Page 12

• Manufacturer Part Number: LX1745CPW
• Description: IC LED DRVR WT/CLR BCKLT 20TSSOP
• Manufacturer: Microsemi Analog Mixed Signal Group
• Type: Backlight, White LED, Color LEDr

Specifications of LX1745CPW

• Constant Current: Yes
• Topology: PWM, Step-Up (Boost)
• Number Of Outputs: 3
• 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: 20-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. 1.2, 2006-02-27
Notes
CR3, CR4, CR5
C9, C10, C12,
R9, R10, R11
LED1, LED2,
LED3, LED4
C2, C5, C6
C3, C7, C8
R2, R6, R8
CR1, CR2,
L1, L2, L3
TM
R12, R13
C4, C11
1.
R1, R5
Note: All pins are referenced to ground.
C13
Ref
Q1
C1
R3
R4
R7
U1
Jumper
Use these locations to insert additional input and/or output capacitance.
JU1
JU2
JU3
JU4
CAPACITOR, 4.7μF, 1210, 6.3V
CAPACITOR, 4.7μF, 1210, 35V
CAPACITOR, 1μF, 0805, 35V
Microsemi UPS5819, SCHOTTKY, 1A, 40V, POWERMITE
Microsemi UPWLEDxx, LED, Optomite
INDUCTOR, 47μH, 480mA, SMT
FDV303N MOSFET, 30V, SOT-23
RESISTOR, 1M, 1/16W, 0805
RESISTOR, 75K, 1/16W, 0805
RESISTOR, 15, 1/16W, 0805
RESISTOR, 4.02K, 1/16W, 0805
RESISTOR, 1.25M, 1/16W, 0805
RESISTOR, 10K, 1/16W, 0805
RESISTOR, 100K, 1/16W, 0805
Microsemi LX1745CPW BOOST CONTROLLER
CAPACITOR, 1000pF, 0805, 35V
CAPACITOR, (SPARE), See Note 1
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: [phone]
Position
N/A
N/A
N/A
N/A
Table 4: Factory Installed Component List
Table 3: Jumper Position Assignments
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
Triple Output Boost – LED Driver / LCD Bias
Part Description
Function
P
RODUCTION
D
ATASHEET
LX1745
Page 12