AP5727_11 Datasheet, PDF (1/10 Pages) Diodes Incorporated – BIAS POWER SUPPLY FOR OLED SUB DISPLAY AND TFT-LED

AP5727
BIAS POWER SUPPLY FOR OLED
SUB DISPLAY AND TFT-LED
Description
Pin Assignments
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.
( Top View )
SW ¹
5 VIN
GND 2
FB 3
74 _EN
SOT25
Features
Applications
• 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)
• 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
L1
D1
22uH
V_OUT
C _IN
4.7uF
V_IN
SW
AP5727
EN
FB
GND
C_OUT
R1
10uF
R2
AP5727
Document number: DS31887 Rev. 2 - 2
Figure 1. Typical Application Circuit
1 of 10
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January 2011
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