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AUR9801C Datasheet

Li-ion/Li Polymer Battery Charger

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Data Sheet
Li-ion/Li Polymer Battery Charger
AUR9801C
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
Aug. 2012 Rev. 1. 0
WDFN-3×3-10
Figure 1. Package Type of AUR9801C
BCD Semiconductor Manufacturing Limited
1


Diodes Semiconductor Electronic Components Datasheet

AUR9801C Datasheet

Li-ion/Li Polymer Battery Charger

No Preview Available !

Li-ion/Li Polymer Battery Charger
Pin Configuration
D Package
WDFN-3×3-10
Data Sheet
AUR9801C
Figure 2. Pin Configuration of AUR9801C (Top View)
Pin Functions
Pin Number
1
2
3
4
5
6
7
8
9
10
Pin Name
VIN
TIME
GND
EN
V2P8
IREF
VSEN
VBAT
Pin Type
POWER
O
O
I
GROUND
I
O
I
I
O
Function
Charger input supply voltage
Active-low, open-drain output, capable of sinking 5mA
current
Open-drain pin to show charging and inhibit states,
capable of sinking 5mA current
Timing capacitor pin for connecting a capacitor to set
internal clocking and charger time reference
Ground pin
Chip enable control, high to activate the chip with internal
880Kpull-up resistor
2.8V reference voltage output, capable of driving up to
2mA
A resistor can be connected at the pin to set the charge
current
VSEN is the remote voltage sense pin. Connect to battery
positive node
Connection to the battery positive node
Aug. 2012 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
2


Part Number AUR9801C
Description Li-ion/Li Polymer Battery Charger
Maker BCD
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AUR9801C Datasheet PDF






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