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Data Sheet

Li-ion/Li Polymer Battery Charger AUR9801C

Aug. 2012 Rev. 1. 0 BCD Semiconductor Manufacturing Limited

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

×3-10

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