ACT6311
Rev 3, 22-Feb-11
White LED/OLED Step-Up Converter
FEATURES
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•
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Adjustable Output Voltage
Drives OLEDs or White LEDs
30V High Voltage Switch
1MHz Switching Frequency
Tiny Inductors and Capacitors
Tiny SOT23-5 Package
GENERAL DESCRIPTION
The ACT6311 step-up DC/DC converter is
optimized for driving OLEDs or white LEDs. It can
provide an output voltage up to 24V. The device is
capable of driving up to seven LEDs in series from a
Lithium-Ion battery, with inherent current matching
and uniform brightness.
The ACT6311 incorporates a 30V high voltage
switch. The device operates at 1MHz and allows the
use of few external components. The ACT6311 is
available in the tiny SOT23-5 package.
APPLICATIONS
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OLED Applications
Cell Phones
Digital Cameras
PDAs, Laptops
MP3 Players
GPS
Efficiency vs. Output Current
100
ACT6311-0001
80
Efficiency (%)
60
V
IN
= 3.6V
VIN = 3.6V
V
IN
= 3V
VIN = 3V
40
20
0
0
5
10
15
20
25
30
35
Output Current (mA)
Figure 1. Typical Application Circuit
Innovative Power
TM
-1-
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