AP5727 Diodes, Inc., AP5727 Datasheet

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AP5727

Manufacturer Part Number
AP5727
Description
Bias Power Supply For Oled Sub Display And Tft-lcd
Manufacturer
Diodes, Inc.
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AP5727WG
Quantity:
920
Part Number:
AP5727WG-7
Manufacturer:
DIODES/美台
Quantity:
20 000
Features
Applications
Typical Application Circuit
AP5727 Rev. 1
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
V
IN
4.7uF
C
IN
Figure 1. Typical Application Circuit
Bias Power Supply For OLED Sub Display and TFT-LCD
EN
V
www.diodes.com
IN
AP5727
GND
22uH
V
L1
OUT
1 of 11
=
SW
V
FB
FB
General 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.
1
+
R2
R1
D1
R1
R2
C
10uF
OUT
SEPTEMBER 2009
©
AP5727
V
Diodes Incorporated
OUT

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AP5727 Summary of contents

Page 1

... AP5727 Rev. 1 Bias Power Supply For OLED Sub Display and TFT-LCD General 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 ...

Page 2

... When not used, connect EN to the input source for automatic startup. The EN pin cannot be left floating. V Input Supply Pin. Must be locally decoupled - 4.7μF recommended to reduce input noise. IN AP5727 Rev. 1 Bias Power Supply For OLED Sub Display and TFT-LCD AP 5727 Green G : Green ...

Page 3

... T Storage Temperature Range ST Caution: The absolute maximum ratings are rated values exceeding which the product could suffer physical damage. These values must therefore not be exceeded under any condition. AP5727 Rev. 1 Bias Power Supply For OLED Sub Display and TFT-LCD Comparator ...

Page 4

... Junction-to-Ambient Thermal Resistance θ JC Junction-to-Case Notes: 3. Test condition for SOT25: Device mounted on FR-4 substrate, single-layer PC board, 2oz copper, with minimum recommended pad layout AP5727 Rev. 1 Bias Power Supply For OLED Sub Display and TFT-LCD Parameter o (V =3.6V, T =25 C, unless otherwise specified.) ...

Page 5

... V ( vs. Frequency IN 1.4 1.3 1.2 1.1 1 2 vs. Feedback Voltage IN 1.27 1.26 1.25 1.24 1.23 1.22 2 (V) IN AP5727 Rev. 1 Bias Power Supply For OLED Sub Display and TFT-LCD ( 800 700 600 500 400 300 200 100 0 4.5 5 5.5 2.5 100 4.5 5 5.5 2.5 1.27 1.26 1.25 1.24 1.23 1.22 0 4 www.diodes.com ...

Page 6

... Typical Performance Characteristics Temperature vs. Shutdown Current 2 1.6 1.2 0.8 0.4 0 -50 - Temperature (℃) Temperature vs. Feedback Voltage 1.3 1.28 1.26 1.24 1.22 1.2 -50 - Temperature (℃) AP5727 Rev. 1 Bias Power Supply For OLED Sub Display and TFT-LCD ( 1.7 1.4 1.1 0.8 0.5 75 100 125 -50 - 100 125 www ...

Page 7

... Typical Performance Characteristics V Ripple OUT V = 3.3V 15V ; I OUT OUT IN POWER 3.3V 15V ; I OUT OUT IN AP5727 Rev. 1 Bias Power Supply For OLED Sub Display and TFT-LCD (Continued) = 5mA V = 3.3V OUT = 50mA V = 3.3V OUT www.diodes.com AP5727 V Ripple OUT = 15V ...

Page 8

... DCR. Capacitor Selection Ceramic capacitors, due to their small size, are ideal for AP5727 applications. X5R and X7R types are recommended because they retain their capacitance over wider voltage and temperature ranges than other types such as X5R and X7R ...

Page 9

... Vendor Capacitance TAIYO YUDEN 4.7uF TAIYO YUDEN 10uF Table 3. Suggested Diodes Vendor Rating DIODES 30V/0.5A Table 4. Suggested Resistor Vendor Type YAGEO SMD AP5727 Rev. 1 Bias Power Supply For OLED Sub Display and TFT-LCD 22uH B130 Vin 2 GND ...

Page 10

... Marking Information (1) SOT25 ( Top View ) Part Number AP5727 Package Information (1) Package Type: SOT25 AP5727 Rev. 1 Bias Power Supply For OLED Sub Display and TFT-LCD Identification Code Y : Year 0 Week : A~Z : 1~26 week; a~z : 27~52 week; z represents 52 and 53 week A~Z : Green Package Identification Code ...

Page 11

... Customers must fully indemnify Diodes Incorporated and its representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems. Copyright © 2009, Diodes Incorporated www.diodes.com AP5727 Rev. 1 Bias Power Supply For OLED Sub Display and TFT-LCD IMPORTANT NOTICE LIFE SUPPORT www ...

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