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AP5727 Datasheet

BIAS POWER SUPPLY

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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
http://www.DataSheet4U.net/
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
VIN
L1
22uH
D1
VOUT
C IN
4.7uF
VIN SW
AP5727
EN FB
GND
COUT
R1 10uF
R2
AP5727
Document number: DS31887 Rev. 2 - 2
Figure 1. Typical Application Circuit
1 of 10
www.diodes.com
January 2011
© Diodes Incorporated
datasheet pdf - http://www.DataSheet4U.net/


Diodes Semiconductor Electronic Components Datasheet

AP5727 Datasheet

BIAS POWER SUPPLY

No Preview Available !

Functional Block Diagram
FB 3
VIN 5
V REF
1.25V
A1
-+
EN 4
Shutdown
AP5727
BIAS POWER SUPPLY FOR OLED
SUB DISPLAY AND TFT-LED
Comparator
A2 R
Q
S
Driver
1 SW
Q1
RC
CC
Σ
RAMP
Generator
1.2MHz
Oscillator
2 GND
Figure 2. Block Diagram
http://www.DataSheet4U.net/
Pin Descriptions
Name
SW
GND
FB
EN
VIN
Description
Switch Pin. Connect inductor/diode here. Minimize trace area at this pin to reduce EMI.
GND pin
Feedback Pin. Reference voltage is 1.25V.
Regulator On/Off Control Input. A high input at EN turns on the converter, and a low input turns it off. When not
used, connect EN to the input source for automatic startup. The EN pin cannot be left floating.
Input Supply Pin. Must be locally decoupled - 4.7μF recommended to reduce input noise.
AP5727
Document number: DS31887 Rev. 2 - 2
2 of 10
www.diodes.com
January 2011
© Diodes Incorporated
datasheet pdf - http://www.DataSheet4U.net/



Part Number AP5727
Description BIAS POWER SUPPLY
Maker Diodes
Total Page 10 Pages
PDF Download

AP5727 Datasheet PDF





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