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L5109 Datasheet Preview

L5109 Datasheet

WHITE LED STEP-UP CONVERTER

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L5109 pdf
UNISONIC TECHNOLOGIES CO., LTD
L5109
Advance
WHITE LED STEP-UP
CONVERTER
CMOS IC
DESCRIPTION
The UTC L5109 is an inductor-based DC/DC converter
designed to drive up to six white LEDs in series or 2 rows of
LEDs with 5 for each in parallel for backlight. Only one feedback
resistor is needed to control the LED current and obtain required
brightness.
FEATURES
* Inherently Uniform LED Current
* High Efficiency up to 83.5%
* No Need for External Schottky Diode
* Over Output Voltage Protection
* OVP
* 1.2MHz Switching Frequency
ORDERING INFORMATION
Ordering Number
L5109G-AG6-R
Package
SOT-26
54
6
1 23
SOT-26
Packing
Tape Reel
MARKING
www.unisonic.com.tw
Copyright © 2015 Unisonic Technologies Co., Ltd
1 of 4
QW-R125-038.a



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L5109 Datasheet Preview

L5109 Datasheet

WHITE LED STEP-UP CONVERTER

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L5109 pdf
L5109
PIN CONFIGURATION
Advance
CMOS IC
PIN DESCRIPTION
PIN NO.
1
2
3
4
5
6
PIN NAME
SW
GND
FB
CTRL
VOUT
VIN
Switch Pin.
Ground Pin
Feedback Voltage.
Shutdown and Dimming Pin.
Output Pin.
Input Supply Pin.
DESCRIPTION
BLOCK DIAGRAM
FB
3
6
VIN
VREF
200mV
-
+ EA
+
CTRL
4
SW
1
5
SS VOUT
-
PWM
+
DRIVER
RQ
S
OVP
Q1
COMPARATOR
-
2
+ GND
RAMP
GENERATOR
1.2 MHz OSC
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
2 of 4
QW-R125-038.a


Part Number L5109
Description WHITE LED STEP-UP CONVERTER
Maker UTC
Total Page 4 Pages
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