AP5727 Diodes, Inc., AP5727 Datasheet - Page 8

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

Typical Performance Characteristics
Application Information
Inductor Selection
A 10
efficiency are major concerns, the inductor should have low core loss at 1.2MHz and low 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. A 4.7
AP5727 applications.
Diode Selection
Schottky diodes, with their low forward voltage drop and fast reverse recovery, are the ideal choices for
AP5727 applications. The forward voltage drop of a Schottky diode represents the conduction loss in the
diode, while the diode capacitance (C
voltage drop and diode capacitance need to be considered. Schottky diodes with higher current ratings
usually have lower forward voltage drop and larger diode capacitance, which can cause significant switching
loss at the 1.2MHz switching frequency of the AP5727.
AP5727 Rev. 1
μ
H~22
V
IN
= 3.3V; V
μ
H inductor is recommended for most AP5727 applications. Although small size and high
Load Transient Response
OUT
= 15V ; I
OUT
Bias Power Supply For OLED Sub Display and TFT-LCD
μ
= 5~50mA
F input capacitor and a 10
T
) represents the switching loss. For diode selection, both forward
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V
I
OUT
OUT
(Continued)
μ
F output capacitor are sufficient for most
SEPTEMBER 2009
©
AP5727
Diodes Incorporated