NOT RECOMMENDED FOR NEW DESIGN
Data Sheet
Li-ion/Li Polymer Battery Charger
AUR9801C
Features
General Description
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)
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
WDFN-3×3-10 package.
available
in
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
standard
WDFN-3×3-10
Figure 1. Package Type of AUR9801C
AUR9801C
Document number: DS37578 Rev. 1 - 3
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NOT RECOMMENDED FOR NEW DESIGN
Data Sheet
Li-ion/Li Polymer Battery Charger
AUR9801C
Pin Configuration
D Package
（WDFN-3×3-10）
Pin 1 Mark
VIN
1
10
VBAT
FAULT
2
9
VSEN
STATUS
3
8
IREF
TIME
4
7
V2P8
GND
5
6
EN
Figure 2. Pin Configuration of AUR9801C (Top View)
Pin Functions
Pin Number
Pin Name
Pin Type
1
VIN
POWER
2
FAULT
O
3
STATUS
O
4
TIME
I
5
GND
GROUND
6
EN
I
7
V2P8
O
8
IREF
I
9
VSEN
I
10
VBAT
O
AUR9801C
Document number: DS37578 Rev. 1 - 3
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
880K 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
Connection to the battery positive node
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Data Sheet
Li-ion/Li Polymer Battery Charger
AUR9801C
Functional Block Diagram
VIN
V2P8
IREF
1
10
Current
Sense
7
VBAT
Voltage /
Current
Reference
8
Temp
Control
VSEN
TIME
GND
VSEN
Block
9
4
OSC
Charger
Control
STATUS
3
FAULT
2
STATUS
FAULT
Counter
5
6
EN
Figure 3. Functional Block Diagram of AUR9801C
Ordering Information
AUR9801
Circuit Type
D: WDFN-3×3-10
Charge Voltage
C: 4.256V
G: Green
Package
Temperature
Range
WDFN-3×3-10
-40 to 85C
Part Number
AUR9801CGD
Marking ID
9801C
Packing
Type
Type & Reel
BCD Semiconductor's Pb-free products, as designated with "G" suffix in the part number, are RoHS compliant
and green.
AUR9801C
Document number: DS37578 Rev. 1 - 3
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NOT RECOMMENDED FOR NEW DESIGN
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
VBAT
-0.3 to VIN+0.3
V
-0.3 to VIN+0.3
V
Other Pin Voltage
Thermal Resistance (Simulation)
θJA
45.13
°C/W
Operating Junction Temperature
TJ
160
°C
TSTG
-65 to 150
°C
VHBM
2000
V
VMM
200
V
Storage Temperature
ESD Withstand Voltage
(Human Body Model)
ESD Withstand Voltage
(Machine Model)
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
C
AUR9801C
Document number: DS37578 Rev. 1 - 3
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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
VIN Rising Voltage
3.2
3.6
3.9
V
VIN Falling Voltage
2.25
2.5
2.7
V
3.3
A
Power-on Reset
Standby Current
VBAT Pin Sink Current
ISTANDBY
VIN Pin Supply Current
IIN
VIN
floating
or
EN=LOW
VBAT floating and
EN pulled low
VBAT floating and
EN floating
A
150
1
mA
VIN-VBAT Offset Voltage
Offset Voltage
VOS
VBAT=4.2V,
IBAT=20mA,
use /STATUS pin
45
80
100
mV
4.213
4.256
4.299
V
Voltage Regulation
Output Voltage
VBAT
Dropout Voltage
Tested at 50mA load,
5V input, and 25C
VBAT=4.0V,
Charge Current=0.35A
175
mV
Charge Current
Constant Charge Current
Trickle Charge Current
End-of-Charge Threshold
IMIN
RIREF=100k,
VBAT=3.0V to 4.0V
RIREF=100k,
VBAT=2.5V
RIREF=100k
V2P8
Load current less than
1mA
ICHG
ITRICKLE
760
800
840
120
mA
mA
70
80
90
mA
2.8
2.9
3.0
V
3.97
4.05
4.13
V
V2P8 Pin Output
V2P8 Pin Output Voltage
Recharge Threshold
Recharge Threshold
VRECHG
Recharge Threshold
VRECHGHY
Hysteresis
S
Trickle Charge Threshold
Trickle Threshold
VMIN
Voltage
Trickle Threshold
VMINHYS
Hysteresis
AUR9801C
Document number: DS37578 Rev. 1 - 3
50
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mV
2.7
2.8
2.9
V
50
100
150
mV
October 2014
© Diodes Incorporated
NOT RECOMMENDED FOR NEW DESIGN
Data Sheet
Li-ion/Li Polymer Battery Charger
AUR9801C
Electrical Characteristics(Continued)
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
Temperature Monitoring
Fold-back Threshold
TFOLD
C
107
Oscillator
Oscillation Frequency
fOSC
CTIME=15nF
305
333
370
Hz
Logic Input and Output
EN Pin Logic Input High
EN Pin Logic Input Low
EN Pin Internal Pull-up
Resistance
/STATUS, /FAULT
Output Voltage
AUR9801C
Document number: DS37578 Rev. 1 - 3
1.5
V
0.8
880
10mA Current
6 of 13
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V
k
0.8
V
October 2014
© Diodes Incorporated
NOT RECOMMENDED FOR NEW DESIGN
Data Sheet
Li-ion/Li Polymer Battery Charger
AUR9801C
Typical Performance Characteristics
VIN=5V, TA=25°C, RIREF=100kΩ, VBAT=3.7V, unless otherwise specified.
2.90
1.0
2.88
V2P8 Output Voltage(V)
Charge Current (A)
0.9
0.8
0.7
0.6
0.5
0.4
4.0
4.3
4.6
4.9
5.2
5.5
5.8
6.1
2.86
2.84
2.82
2.80
3.5
4.0
4.5
5.0
5.5
6.0
6.5
Input Voltage(V)
Input Voltage(V)
Figure 4. Charge Current vs. Input Voltage
Figure 5. V2P8 Output Voltage vs. Input Voltage
2.90
V2P8 Output Voltage(V)
2.88
2.86
2.84
2.82
2.80
0
2
4
6
8
10
V2P8 Load Current (mA)
Figure 6. V2P8 Output Voltage vs. V2P8 Load Current
AUR9801C
Document number: DS37578 Rev. 1 - 3
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Data Sheet
Li-ion/Li Polymer Battery Charger
AUR9801C
Description of Charger Operation
The AUR9801C initiates a charger operation when
attached with a voltage source device or adaptor.
Figure 7 shows a typical charge profile when the
chip operates as a conventional linear charger with
a constant voltage source. The charging current is
set by an external resistor up to 1A. The target
charging voltage is 1% accurate over the specified
range.
and /FAULT. The /STATUS is active low as an
open-drain type to indicate a charging cycle and
valid till the End-off-charge (EOC). The /FAULT
output signal becomes low to signal any occurred
fault conditions such as a charging time fault.
When charge with a current-limited adapter,
AUR9801C should be programmed with IREF over
the upper limit of ILIM. A typical charge profile is
displayed in Figure 8 for minimizing power
dissipation during CC mode. The worst power
dissipation is often at the start of CV mode,
although thermal fold-back conditions could still
occur in this application case.
The charger IC resets internal operational circuits
when internal Power-on-reset (POR) signal
becomes valid. V2P8 presents a voltage reference
output source capable of driving 2mA current after
POR. Other indication output pins are /STATUS
Charge current=ICHG
Current
Voltage
VBAT=4.256V
VBAT=4.05V
VBAT=2.8V
Status
Charge Current = 0.1xICHG
Timer Timeout
Time
Pre-charge
Constant Current
Charge
Constant Voltage
Charge
Standby
Mode
Re-charge
Process
Figure 7. A Typical Charge Profile as a Conventional Linear Charger
AUR9801C
Document number: DS37578 Rev. 1 - 3
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Data Sheet
Li-ion/Li Polymer Battery Charger
AUR9801C
Description of Charger Operation (Continued)
Timeout
VBAT
VIN
Charge Current
CC Charge
OFF
CV Charge
Standby
Pre-charge
Figure 8. A Typical Charge Profile with a Current-limited Adapter
AUR9801C
Document number: DS37578 Rev. 1 - 3
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Data Sheet
Li-ion/Li Polymer Battery Charger
AUR9801C
Operation Overview
For linear charging case, the AUR9801C performs
either constant current (CC) and constant voltage
(CV) profiles. The charging current is set by an
external resistor up to 1A for package options. The
target charging voltage is 1% accurate over the
specified range. AUR9801C enters a trickle mode for
preconditioning operation each time when a charging
cycle starts till that the minimum charging voltage is
reached and verified in 15 clock cycles.
A thermal-feedback function offers thermal
protection during linear charging operations. When
the die temperature of AUR9801C goes up above 107
degree C, the charger automatically reduces the
charging current.
AUR9801C provides a TIMEOUT limit to prevent
charging a dead battery for extensive time.
Recharging is automatically started when battery
voltage drops to the recharging threshold point.
AUR9801C enters the shutdown mode in case no
voltage adapter is attached.
AUR9801C
Document number: DS37578 Rev. 1 - 3
/STATUS
/FAULT
High
High
Low
High
High
Low
Condition
Power-down,
charging is suspended
or interrupted
Charging
Bad battery
(Safety timer expired)
Charge current setting
105
Where RIREF in KΩ
I CHG 0.8
R IREF
Charge timer setting
Time 14
10 of 13
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Ctime
1nF
Where Time in Minutes
October 2014
© Diodes Incorporated
NOT RECOMMENDED FOR NEW DESIGN
Data Sheet
Li-ion/Li Polymer Battery Charger
AUR9801C
Flow chart
Power on &
EN=High
Idle mode
No
Pre-charge, timer
start
VBAT >2.8V for 16
clocks ?
No
1/8 Timeout ?
Yes
Yes
Fault
No
Fast charge
VBAT > 4.256V ?
No
Yes
Constant voltage
Charge mode
ICHG < IMIN ?
Yes
Timeout ?
No
No
Yes
Timeout ?
Yes
Timeout?
No
Yes
Yes
AUR9801C
Document number: DS37578 Rev. 1 - 3
Standby mode,
Charger off
VBAT < 4.0V ?
No
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Data Sheet
Li-ion/Li Polymer Battery Charger
AUR9801C
Application Circuit
10F
10F
1
1K
1K
2
LED1
3
LED2
4
VIN
10
VBAT
FAULT
STATUS
TIME
AUR9801C
VIN
+5V
VSEN
9
Li Battery
IREF
V2P8
8
7
100K
6
1F
15nF
5
GND
EN
Figure 9. Typical Application Circuit
1A
ADP
P_MOS
1A
USB
P_MOS
680
10
1
680
VIN
VBAT
BAT
16V
1F
4.7K
loading
AUR9801C
4
4.7K
8
IREF
TIME
200K
15nF
GND
150K
5
N_MOS
200K 150K
85.7 K
200K 150K
IREF ≈ 940mA
Figure 10. External Power Path Application Circuit
AUR9801C
Document number: DS37578 Rev. 1 - 3
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Data Sheet
Li-ion/Li Polymer Battery Charger
AUR9801C
Mechanical Dimensions
WDFN-3×3-10
Unit: mm(inch)
2.900(0.114)
3.100(0.122)
N6
2.000(0.079)
REF
N10
2.250(0.089)
2.500(0.098)
1.550(0.061)
1.800(0.071)
2.900(0.114)
3.100(0.122)
Pin 1 Mark
See DETAIL A
0.300(0.012)
N5
Pin 1 Mark
0.500(0.020)
BSC
0.500(0.020)
N1
0.180(0.007)
0.300(0.012)
DETAIL A
0.700(0.028)
0.800(0.031)
0.153(0.006)
0.253(0.010)
2
0.000(0.000)
0.050(0.002)
1
2
1
Pin 1 Mark options
AUR9801C
Document number: DS37578 Rev. 1 - 3
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