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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

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

( Top View )

GND

SOT25

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

GND

AP5727

OUT

10uF

22uH

4.7uF

OUT

Figure 1. Typical Application Circuit

1 2 3 4 5 6 7 8 9 10

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