OZ9986SLASH datasheet(38/56 Pages) ETC1

38 / 56 page

Patents pending.

OZ528

GENERAL DESCRIPTION

The OZ528 is a LCD panel bias power supply controller, suitable for GPS ap-

plication. It generates four voltage rails for a TFT LCD panel. It includes a boost

converter to provide the source voltage, buck converter to provide the logic

voltage for the system, boost converter for positive gate voltage and a negative

charge-pump driver to provide adjustable regulated output voltages to bias the

TFT panel.

OZ528 has power-on sequencing. The buck converter is the first to start after

the IC is enabled. Two boost converters and a negative charge-pump are en-

abled when their corresponding TIMER reaches approximately 2.0V.

APPLICATIONS

APPLICATION DIAGRAM

• GPS

FEATURES

• High power DC/DC power

converter

• Operation frequency

synchronization

• Optional spread spectrum

operation frequency

• Thermal, over-current, and over

load protection

• Abnormal pulled-up output

protection

• LED fault status output

Buck Converter

• Integrated power MOSFET

• Current mode control

• Soft start function

Two Independent Boost

Converters

• Integrated power MOSFET

• Current mode control

• Wide output range: up to 25.0V

• Adjustable power on/off delay time

• Soft start function

Negative Charge Pump

• Voltage mode control

• Adjustable power on/off delay time

OZ9986/ Datasheet(PDF) 38 Page - List of Unclassifed Manufacturers