LX1745 Datasheet, PDF (11/16 Pages) Microsemi Corporation – Triple Output Boost - LED Driver / LCD Bias

INTEGRATED PRODUCTS
LX1745
Triple Output Boost – LED Driver / LCD Bias
PRODUCTION DATASHEET
EVALUATION BOARD
Name
Table 2: Input and Output Pin Assignments
Input/Output
Range
Description
VIN
0 to 6V
Main power supply for outputs.
GND
0V
Common ground reference.
ADJ1
ADJ2
0 to VIN-100mV
Apply a DC voltage or a PWM voltage to this pin to adjust the LCD1
output voltage. PWM inputs should be greater than 120Hz.
Apply a DC voltage or a PWM voltage to this pin to adjust the LCD2
output voltage. PWM inputs should be greater than 120Hz.
SHDN
SHDN1
0 to VIN
Pulled up to VIN on board (10KΩ), Ground to inhibit the LED driver
output (VOUT).
Pulled up to VIN on board (10KΩ), Ground to inhibit the VLCD1.
SHDN2
Pulled up to VIN on board (10KΩ), Ground to inhibit the VLCD2.
VLCD1
≤25V
Output voltage test point. Programmed for 18V output, adjustable up to
25V.
-VLCD
≥-25V
Output voltage mirror of VLCD1
VLCD2
VOUT
≤25V
≤25V
Output voltage test point. Programmed for 22V output, adjustable up to
25V.
LED drive voltage probe point.
FDBK
0 to VIN
LED current sense feedback.
BRT
0 to 350mV
Apply a DC voltage or a PWM voltage to this pin to adjust the LED
current. PWM inputs should be greater than 120Hz with a DC portion
less than 350mV.
REF
1.19V Typ. Buffered IC reference output.
Note: All pins are referenced to ground.
Copyright  2000
Rev. 1.1a, 2004-02-06
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: [phone]
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