uP8003
Multiple-Input Li-ion Battery Charger
in QFN4x4 Package
Features
General Description
The uP8003 is a highly integrated complete battery charger
specifically designed for digital still camera where PCB
area is specially concerned.
Complete Charger for 1-Cell Li-ion Batteries
Integrated Single-Pole-Triple-Throw Power
Multiplexer
Three Power Input Indications
USB Voltage Monitoring
The uP8003 integrates a single-pole-triple-throw power
multiplexer that automatically selectsAC adaptor, Dock or
USB inputs according to default priority. External ORing
diode is not necessary in real application. The USB input
power can be turned off by a USB_OFF control pin. The
uP8003 features open-drain outputs for input power
detection.Avoltage monitoring pin is also available for USB
input.
USB ON/OFF Control
Integrated Pass Element and Current Sensor
No External Blocking Diode Required
1% Voltage Accuracy
Programmable Charge Current up to 1.5A
NTC Interface for Battery Temperature Sensing
Battery Insertion Detection
The uP8003 charges battery with a minimum current when
the battery voltage is lower than 2.8V. The charger works
at constant current mode when the battery voltage is
between 2.8V and 4.2V, the charge current is
programmable up to 1.5Aby an external resistor. The charge
works at constant voltage mode when the battery voltage
is 4.2V. When the input voltage is removed, the uP8003
automatically enters a low quiescent current sleep mode,
dropping the battery drain current to 1uA.
1uA Battery Drain Current when Input Voltage
is Removed
Automatic Trickle Charging of Low Voltage
Cells
Automatic Battery Recharge
RoHS Compliant and Halogen Free
The uP8003 provides a programmable time-out function that
initiates fault alarm if charge cycle is not complete within
the time-out period. The uP8003 features open-drain status
and fault outputs that indicate charge status and fault
conditions respectively.
Pin Configuration
Other features include thermal foldback charge current,
NTC thermistor interface and automatic recharge. The
uP8003 is available in thermal-enhanced and space-saving
VQFN4x4 - 24L package.
2V8
TEMP
CP
1
2
3
4
5
6
18 USB_IREF
17 IREF
16 CHG_PWR
15 DOCK_PWR
14 ADP_PWR
13 USB_PWR
Ordering Information
AGND
WAKE_A
WAKE_B
EN
Order Number
Package
Top Marking
uP8003AG
uP8003AQAG VQFN4x4 - 24L
Note: uPI products are compatible with the current IPC/
JEDEC J-STD-020 requirements. They are halogen-free,
RoHS compliant and 100% matte tin (Sn) plating that are
suitable for use in SnPb or Pb-free soldering processes.
Applications
QFN4X4-24L
Digital Still Camera
Charging Docks and Cradles
USB Powered Chargers
uPI Semiconductor Corp., http://www.upi-semi.com
Rev. P02, File Name: uP8003-DS-P0202
1
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