Diodes AUR9801C User Manual

Li-ion/Li Polymer Battery Charger AUR9801C

Data Sheet

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.

WDFN-3

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

×3-10

Figure 1. Package Type of AUR9801C

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

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Data Sheet

Li-ion/Li Polymer Battery Charger AUR9801C

Pin Configuration

D Package

（WDFN-3×3-10）

Figure 2. Pin Configuration of AUR9801C (Top View)

Pin Functions

Pin Number Pin Name Pin Type Function

1

2

3

4

5

6

7

8

9

10

VIN POWER Charger input supply voltage

TIME I

GND GROUND Ground pin

EN I

V2P8 O

IREF I

VSEN I

VBAT O Connection to the battery positive node

O

O

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

Chip enable control, high to activate the chip with internal
880KΩ pull-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

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

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Data Sheet

Li-ion/Li Polymer Battery Charger AUR9801C

Functional Block Diagram

VIN

V2P8

IREF

VSEN

TIME

GND

1

7

8

9

4

5 6

Voltage

Current

Reference

VSEN

Block

CounterOSC

/

Figure 3. Functional Block Diagram of AUR9801C

Ordering Information

Circuit Type D: WDFN-3×3-10

Charge Voltage G: Green
C: 4.256V

Package

Temperature

Range

Current

Sense

Charger

Control

STATUS

AUR9801

Part Number Marking ID

FAULT

Temp

Control

10

VBAT

3

STATUS

2

FAULT

EN

Packing

Type

WDFN-3×3-10

-40 to 85°C

AUR9801CGD 9801C Type & Reel

BCD Semiconductor's Pb-free products, as designated with "G" suffix in the part number, are RoHS compliant
and green.

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

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Data Sheet

Li-ion/Li Polymer Battery Charger AUR9801C

Absolute Maximum Ratings (Note 1)

Parameter Symbol Value Unit

Supply Input Voltage VIN -0.3 to 6.5 V

Enable Input Voltage VEN -0.3 to VIN+0.3 V

Output Voltage V

Other Pin Voltage -0.3 to VIN+0.3 V

Thermal Resistance (Simulation) θJA 45.13 °C/W

Operating Junction Temperature TJ 160 °C

Storage Temperature T

ESD Withstand Voltage
(Human Body Model)
ESD Withstand Voltage
(Machine Model)

-0.3 to VIN+0.3 V

BAT

-65 to 150 °C

STG

2000 V

V

HBM

200 V

V

MM

Note 1: Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to
the device. These are stress ratings only, and functional operation of the device at these or any other conditions
beyond those indicated under “Recommended Operating Conditions” is not implied. Exposure to “Absolute
Maximum Ratings” for extended periods may affect device reliability.

Recommended Operating Conditions

Parameter Symbol Min Max Unit

Supply Voltage VIN 4.6 5.5 V

Ambient Temperature Range TA -40 85

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

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°C

Data Sheet

Li-ion/Li Polymer Battery Charger AUR9801C

Electrical Characteristics

VIN=5V and TA=25°C for the typical values. The maximum and minimum values are over -40°C to 85°C
Ambient Temperature with a supply voltage in the range of 4.6V to 5.5V, unless otherwise specified.

Parameter Symbol Conditions Min Typ Max Units

Power-on Reset

VIN Rising Voltage 3.2 3.6 3.9 V

VIN Falling Voltage 2.25 2.5 2.7 V

Standby Current

VBAT Pin Sink Current I

STANDBY

VIN Pin Supply Current IIN

VIN-VBAT Offset Voltage

Offset Voltage VOS

Voltage Regulation

Output Voltage V

BAT

Dropout Voltage

Charge Current

Constant Charge Current I

Trickle Charge Current I

End-of-Charge Threshold I

CHG

TRICKLE

MIN

V2P8 Pin Output

V2P8 Pin Output Voltage V

2P8

Recharge Threshold

VIN floating or
EN=LOW
VBAT floating and
EN pulled low
VBAT floating and
EN floating

V

=4.2V,

BAT

=20mA,

I

BAT

use /STATUS pin

Tested at 50mA load,
5V input, and 25°C

=4.0V,

V

BAT

Charge Current=0.35A

=100kΩ,

R

IREF

=3.0V to 4.0V

V

BAT

=100kΩ,

R

IREF

V

BAT

R

IREF

=2.5V
=100kΩ

Load current less than
1mA

3.3

150

µA

µA

1 mA

45 80 100 mV

4.213 4.256 4.299 V

175 mV

760 800 840 mA

120 mA

70 80 90 mA

2.8 2.9 3.0 V

Recharge Threshold V

Recharge Threshold

V

Hysteresis

3.97 4.05 4.13 V

RECHG

RECHGHY

S

50 mV

Trickle Charge Threshold

Trickle Threshold
Voltage
Trickle Threshold
Hysteresis

2.7 2.8 2.9 V

V

MIN

V

50 100 150 mV

MINHYS

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

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