OZ522 назначение, описание, схема включения
Микросхема OZ522, Производитель- O2micro®
FEATURES OZ522
Charger
• 550KHz switching mode charger
for 1 – 4 cell LiIon or LiPolymer
batteries
• Supports fast charge mode
• Wake up charging function for
discharged batteries
• Built-in charge termination function
• Internal safety timer for charger
• 92% effi ciency
• Automatic battery recharge
• 1% constant voltage accuracy
• Charge status indication by LED
• Battery absence detection
DC/DC Converters
• Two switch mode buck converters
with under-voltage protection
• 2% voltage accuracy
• Output protection:
— Over-current for each DC/DC
converter
— Over-voltage lockout on adapter
voltage
— Under-voltage lockout on battery
voltage
• Output voltage range of 1.0V to 5.5V
• Integrated soft start function, 4ms soft
start function at start-up
• ON/OFF control pin
GENERAL DESCRIPTION OZ522
The OZ522 provides a complete charging algorithm to control 1 – 4 cell LiIon batter-
ies, used in Portable DVD (PDVD), and other portable electronic equipment. It deliv-
ers a wake-up charging current for discharged batteries followed by a fast charging
current to minimize the charging time, and keeps the battery regulation voltage
with 1% accuracy. A battery temperature sensing scheme allows the battery to be
charged within a user-defi ned temperature range. The switch mode charger allows
use of low AC adapter voltage at high effi ciency.
Схема включения OZ522
Описание микросхем серии OZ99XX в формате PDF, скачать
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