Diodes AUR9801C - Manual

Data Sheet
Li-ion/Li Polymer Battery Charger AUR9801C
Aug. 2012 Rev. 1. 0 BCD Semiconductor Manufacturing Limited
1
General Description
The AUR9801C is a highly-integrated battery charger
for single-cell Li-ion or Li-polymer batteries capable
of operating with an input voltage reached 2.5V. It is
a complete charger device designed to work with an
USB port or 5V output AC adapter.
The AUR9801C operates with CC (constant current)
mode and CV (constant voltage) mode profiles. A
low-current preconditioning charge mode is also
provided as a trickle charging operation. The charge
current is programmable up to 1A with an external
resistor or a logic input. The charge voltage is 1%
accurate over the full application range.
When operating with a current-limited adapter, the
charger minimizes the thermal dissipation with
pulsed operations to prevent overheat conditions that
is commonly occurred with conventional linear
chargers. The AUR9801C reduces charge current for
thermal fold-back to ensure product safe operation.
The charger automatically re-charges the battery
when the battery voltage drops blow a recharge
threshold. The chip includes a safety timer for setting
the fast charge time limit in case of charging a dead
battery.
The AUR9801C is available in standard
WDFN-3×3-10 package.
Features
• Complete Charger for Single-cell Li-ion
Batteries
• Charges from either AC Adapter or USB Port
• Integrated Power Pass Device with Current
Sensing
• No External Blocking Diode Required
• Pre-charge Condition with Safety Timing
• 1% Charger Voltage Accuracy
• Programmable Current Limit up to 1A
• Sleep Mode for Power Saving
• Charge Current Thermal Fold-back
• Stand-alone or Integrated Charger
• Ambient Temperature Range: -40°C to 85°C
• Thermally-enhanced WDFN-3×3-10 Package
•
Pb-free Plus Anneal Available (RoHS
Compliant)
Applications
• PDAs, Cell Phones and Smart Phones
• Digital Camera, MP3 and Handheld Gamming
• Portable Instruments Including Medical
Handhelds
• Self-charging Battery Packs
• Stand-alone Chargers or USB Port Chargers
Figure 1. Package Type of AUR9801C
WDFN-3 Ч3-10