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AP5727
BIAS POWER SUPPLY FOR OLED
SUB DISPLAY AND TFT-LED
AP5727
Document number: DS31887 Rev. 2 - 2
1 of 10
www.diodes.com
January 2011
© Diodes Incorporated
NEW PRODUCT
Description
The AP5727 is a high efficiency boost converter in a
compact SOT25 that provides the bias voltages for OLED
Sub Display and TFT-LCD (Liquid Crystal Display).
A high 1.2MHz switching frequency and internal
compensation minimizes external part count, PCB area and
cost. Integrated soft start reduces inrush current.
The AP5727 has a 1.25V feedback voltage making it
compatible with industry standard boost converters used to
bias LCD panels.
Pin Assignments
1
2
3
7
4
5
FB
SW
( Top View )
V
IN
GND
SOT25
EN
Features
30V High Output Voltage
Fast 1.2MHz Switching Frequency
Current limit and UVLO Protections
Internal Thermal Shutdown
Maximum 1µA Shutdown Current
Integrated Soft-start Function
SOT25: Available in “Green” Molding Compound
(No Br, Sb)
Lead Free Finish/RoHS Compliant (Note 1)
Applications
Small size TFT-LCD Bias power supply.
OLED bias supply for a clamshell handset sub display
RF amplifier bias voltages
Notes: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at http://www.diodes.com/products/lead_free.html.
Typical Application Circuit
V
IN
SW
EN
GND
FB
AP5727
C
OUT
10uF
R2
L1
22uH
D1
V
IN
C
IN
4.7uF
R1
V
OUT
Figure 1. Typical Application Circuit
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Inhaltsverzeichnis

Seite 1 - © Diodes Incorporated

AP5727BIAS POWER SUPPLY FOR OLED SUB DISPLAY AND TFT-LED AP5727 Document number: DS31887 Rev. 2 - 2 1 of 10 www.diodes.com January 2011 © Diodes In

Seite 2

AP5727BIAS POWER SUPPLY FOR OLED SUB DISPLAY AND TFT-LED AP5727 Document number: DS31887 Rev. 2 - 2 10 of 10 www.diodes.com January 2011 © Diodes I

Seite 3 - January 2011

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Seite 4 - 4 of 10

AP5727BIAS POWER SUPPLY FOR OLED SUB DISPLAY AND TFT-LED AP5727 Document number: DS31887 Rev. 2 - 2 3 of 10 www.diodes.com January 2011 © Diodes In

Seite 5 - Efficiency(%)

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Seite 6 - 6 of 10

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Seite 7 - 7 of 10

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Seite 8 - 8 of 10

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Seite 9 - AP5727 SOT25 H8

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Seite 10 - AP5727

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