EUP8020X Datasheet, PDF (1/12 Pages) Eutech Microelectronics Inc – Dual Source AC/USB Li-Ion/Polymer Charger IC for Portable Applications

EUP8020X
Dual Source AC/USB Li-Ion/Polymer
Charger IC for Portable Applications
DESCRIPTION
FEATURES
The EUP8020X series are highly integrated single cell
Li-Ion/Polymer battery charger IC designed for handheld
devices. The EUP8020X accepts two power inputs,
normally one from a USB port and another one from
AC-adaptor. The EUP8020X automatically selects the
USB-Port or the AC-adapter as the power source for the
system. In the USB configuration, the host can select from
the two preset charge rates of 100 mA and 500 mA. In the
AC−adapter configuration an external resistor sets the
magnitude of the charge current, which may be
programmed up to 1A.
The EUP8020X charges the battery in three phases:
conditioning, constant current, and constant voltage.
Charge is terminated based on minimum current. An
internal charge timer provides a backup safety for charge
termination. The EUP8020X automatically re-starts the
charge if the battery voltage falls below an internal
threshold. The EUP8020X also automatically enters sleep
mode when both supplies are removed. No external sense
resistor or blocking diode is required for charging.
The EUP8020X integrates internal power FET , current
sensor, charge status and reverse current protection in a
single monolithic devices.
z Charges Single Cell Li-Ion/Polymer from Either
AC Adapter or USB With Autonomous
Power-Source Selection
z Integrated Power FET and Current Sensor for Up
to 1A Charge Applications From AC Adapter
z Integrated USB Control With Selectable
100 mA and 500 mA Charge Rates
z Precharge Conditioning With Safety Timer
z Power Good (AC Adapter Present) Status Output
z Optional Battery Temperature Monitoring Before
and During Charge
z Automatic Sleep Mode for Low-Power
Consumption
z Available in TDFN-10 Package
z RoHS Compliant and 100% Lead (Pb)-Free
APPLICATIONS
z Smartphones
z Digital Cameras
z PDAs/ MP3 Players
z Other Battery-Powered Devices
Typical Application Circuit
DS8020X Ver 1.1 June 2006
Figure 1. EUP8020A
1