EUP8090
1A Linear Li-Ion/Polymer Charger IC
with Integrated FET and Charger Timer
DESCRIPTION
FEATURES
The EUP8090 series are highly integrated single cell
Li-Ion/Polymer battery charger IC designed for handheld
devices. This charger is designed to work with various
types of AC adapters capable of operating with an input
voltage as low as 2.65V.
The EUP8090 operates as a linear charger and charges the
battery in three phases: trickle current, constant current,
and constant voltage. When AC-adapter is applied, an
external resistor sets the magnitude of the charge current,
which may be programmed up to 1A with TDFN10
package and a current-limited adapter for lowest power
dissipation.
The EUP8090 features thermal regulation loop to control
charge current to keep safe operation when PCB lacked of
enough heat-sinking. A programmable charge timer
provides a backup safety for termination. The EUP8090
automatically re-starts the charge if the battery voltage
falls below an internal threshold and automatically enters
sleep mode when DC supplies are removed. No external
sense resistor or blocking diode is required for charging.
Very Low Power Dissipation
Accepts Multiple Types of Adapters Power
Integrated Power FET and Current Sensor for Up
to 1A Charge Applications
Guaranteed to Operate at 2.65V After Start-Up
Charge Termination by Minimum Current and
Time
Precharge Conditioning With Safety Timer
Reverse Leakage Protection Prevents Battery
Drainage
Charge Current Thermal Regulation
Status Outputs for LED or System Interface
Indicates Charge Conditions
Automatic Sleep Mode for Low-Power
Consumption
Available in 3mm× 3mm TDFN-10 Package
RoHS Compliant and 100% Lead (Pb)-Free
Halogen-Free
Typical Application Circuit
APPLICATIONS
PDAs, Cell Phones and Smart Phones
Portable Instruments.
Stand-Alone Charger.
USB Bus Powered Charger.
DS8090 Ver 1.0 Apr. 2012
Figure 1.
1
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