EUP8054/8054X
Standalone Linear Li-Ion Battery Charger
With Thermal Regulation in ThinSOT
DESCRIPTION
The EUP8054 is a complete constant-current/constant-
voltage linear charger for single cell lithium-ion batteries.
Its ThinSOT package and low external component count
make the EUP8054 ideally suited for portable applications.
Furthermore, the EUP8054 is specifically designed to
work within USB power specifications.
No external sense resistor is needed, and no blocking
diode is required due to the internal MOSFET architecture.
Thermal feedback regulates the charge current to limit the
die temperature during high power operation or high
ambient temperature. The charge voltage is fixed at 4.2V,
and the charge current can be programmed externally with
a single resistor. The EUP8054 automatically terminates
the charge cycle when the charge current drops to 1/10th
the programmed value after the final float voltage is
reached.
When the input supply (wall adapter or USB supply) is
removed, the EUP8054 automatically enters a low current
state, dropping the battery drain current to less than 2µA.
The EUP8054 can be put into shutdown mode, reducing
the supply current to 25µA.
Other features include charge current monitor,
undervoltage lockout, automatic recharge and a status pin
to indicate charge termination and the presence of an input
voltage.
FEATURES
Programmable Charge Current Up to 800mA
No MOSFET, Sense Resistor or Blocking Diode
Required
Complete Linear Charger in ThinSOT Package for
Single Cell Lithium-ion Batteries
Constant-Current/Constant-Voltage Operation with
Thermal Regulation to Maximize Charge Rate
Without Risk of Overheating
Charges Single Cell Li-Ion Batteries Directly from
USB Port
Preset 4.2V Charge Voltage with
±
1% Accuracy
Charge Current Monitor Output for Gas Gauging
Automatic Recharge
Charge Status Output Pin
C/10 Charge Termination
25µA Supply Current in Shutdown
2.9V Trickle Charge Threshold (EUP8054)
Available Without Trickle Charge (EUP8054X)
Soft-Start Limits Inrush Current
Available in TSOT-25, TDFN-6(3mm*3mm)
Package
RoHS Compliant and 100% Lead (Pb)-Free
APPLICATIONS
Cellular Telephones/ PDAs/ MP3 Players
Charging Docks and CradIes
Bluetooth Applications
DS8054
Ver1.1
Jan. 2007
1
EUP8054/8054X
Typical Application Circuit
Figure 1. 600mA Single Cell Li-ion Charger
Figure 2. USB/Wall Adapter Power Li-Ion Charger
Figure 3. Full Featured Single Cell Li-Ion Charger
Figure 4. 800mA Li-Ion Charger with External
Power Dissipation
Figure 5. Basic Li-Ion Charger with Reverse
Polarity Input Protection
DS8054
Ver1.1
Jan. 2007
2
EUP8054/8054X
Pin Configurations
Package Type
Pin
Configurations
TSOT-25
TDFN-6
Pin Description
PIN
TSOT-25
TDFN6
DESCRIPTION
CHRG
GND
BAT
V
CC
PROG
N/C
1
2
3
4
5
1
2
6
4
3
5
Open-Drain Status Output
Ground
Charge Current Output
Positive Input Supply Voltage
Charge Current Program, Charge Current Monitor and Shutdown Pin.
No connection
Pin Functions
CHRG :
Open-Drain Charge Status Output. When the battery is charging, the
CHRG pin is pulled low by an
internal N-channel MOSFET. When the charge cycle is completed, a weak pull-down of approximately 12µA is
connected to the CHRG pin, indicating a “AC present” condition. When the EUP8054 detects an undervoltage
lockout condition, CHRG is forced high impedance.
GND :
Ground.
BAT :
Charge Current Output. Provides charge current to the battery and regulates the final float voltage to 4.2V.
An internal precision resistor divider from this pin sets the float voltage which is disconnected in shutdown
mode.
V
CC
:
Positive Input Supply Voltage. Provides power to the charger. V
CC
can range from 4.35V to 6.5V and
should be bypassed with at least a 1µF capacitor. When V
CC
drops to within 30mV of the BAT pin voltage, the
EUP8054 enters shutdown mode, dropping IBAT to less than 2µA.
DS8054
Ver1.1
Jan. 2007
3
EUP8054/8054X
Pin Functions
(continue)
PROG:
Charge Current Program, Charge Current Monitor and Shutdown Pin. The charge current is programmed
by connecting a 1% resistor, R
PROG
, to ground. When charging in constant-current mode, this pin servos to 1V. In
all modes, the voltage on this pin can be used to measure the charge current using the following formula:
I BAT
=
VPROG / R PROG
•
1000
(
)
The PROG pin can also be used to shutdown the charger. Disconnecting the program resistor from ground
allows a 3µA current to pull the PROG pin high. When it reaches the 1.94V shutdown threshold voltage, the
charger enters shutdown mode, charging stops and the input supply current drops to 25µA. This pin is also
clamped to approximately 2.4V. Driving this pin to voltages beyond the clamp voltage will draw currents as high
as1.5mA. Reconnecting R
PROG
to ground will return the charger to normal operation.
N/C:
No connection.
Ordering Information
Order Number
Package Type
Marking
Operating Temperature range
EUP8054OIR1
EUP8054XOIR1
EUP8054RIR1
TSOT-25
TSOT-25
TDFN-6
UNxx
UXxx
xxxx
8054N
-20 °C to 70°C
-20 °C to 70°C
-20 °C to 70°C
EUP8054/X
□ □ □
□
Lead Free Code
1: Lead Free 0: Lead
Packing
R: Tape& Reel
Operating temperature range
I: Industry Standard
Package Type
O: TSOT
R:TDFN
DS8054
Ver1.1
Jan. 2007
4
EUP8054/8054X
Absolute Maximum Ratings
Input Supply voltage, (Vcc) ------------------------------------------------------------------------- -0.3 to +6.5V
PROG ------------------------------------------------------------------------------------------- -0.3V to V
CC
+0.3V
BAT ----------------------------------------------------------------------------------------------------- -0.3 to +6.5V
CHRG --------------------------------------------------------------------------------------------------
-0.3 to +6.5V
BAT Short-Circuit Duration -------------------------------------------------------------------------- Continuous
BAT Pin Current --------------------------------------------------------------------------------------------- 800mA
PROG Pin Current ------------------------------------------------------------------------------------------- 800µA
Maximum Junction Temperature, ------------------------------------------------------------------------ 125°C
Operating Ambient Temperature Range (Note 2) ----------------------------------------------- -40°C to 85°C
Storage Temperature Range ----------------------------------------------------------------------- -65°C to 125°C
Lead Temperature (soldering, 10s) ----------------------------------------------------------------------- 300°C
Electrical Characteristics over Recommended Operating Free-Air Temperature Range
Otherwise specifications are at TA=25
℃
. VCC=5V, unless otherwise noted.
Symbol
V
CC
Parameter
Input Supply Voltage
Conditions
Charge Mode (Note 4),R
PROG
= 10k
Standby Mode (Charge Terminated)
Shutdown Mode (R
PROG
Not
Connected,
V
CC
< V
BAT,
or V
CC
< V
UV
)
0℃
≤
T
A
≤
85℃, I
BAT
= 40mA
R
PROG
= 10k, Current Mode
R
PROG
= 2k, Current Mode
Standby Mode, V
BAT
= 4.2V
Shutdown Mode (R
PROG
Not
Connected)
Sleep Mode, V
CC
= 0V
V
BAT
< V
TRIKL
, R
PROG
= 2k (Note 5)
R
PROG
= 10k, V
BAT
Rising (Note 5)
R
PROG
= 10k (Note 5)
EUP8054
Min. Typ. Max.
4.35
350
200
25
6.5
2000
500
50
Unit
V
µA
I
CC
Input Supply Current
V
FLOAT
Regulated Output (Float) Voltage
I
BAT
BAT Pin Current
4.158
100
475
0
4.2
110
510
-2.5
±
1
±
1
50
2.9
80
3.7
200
1.94
100
30
0.10
0.10
1.03
12
4.242
120
545
-6
±
2
±
2
70
3.0
110
3.85
300
2.05
140
50
0.115
0.115
1.10
20
V
mA
mA
µA
µA
µA
mA
V
mV
V
mV
V
mV
mA/mA
V
µA
I
TRIKL
V
TRIKL
V
TRHYS
V
UV
V
UVHYS
V
MSD
V
ASD
I
TERM
V
PROG
I
CHRG
Trickle Charge Current
Trickle Charge Threshold Voltage
Trickle Charge Hysteresis Voltage
V
CC
Undervoltage Lockout Hysteresis
Manual Shutdown Threshold Voltage
V
CC
– V
BAT
Lockout Threshold
Voltage
C/10 Termination Current Threshold
PROG Pin Voltage
20
2.8
60
3.55
150
1.85
70
5
0.085
0.085
0.96
7
V
CC
Undervoltage Lockout Threshold From V
CC
Low to High
PROG Pin Rising
V
CC
from Low to High
V
CC
from High to Low
R
PROG
= 10k (Note 6)
R
PROG
= 2k
R
PROG
= 10k, Current Mode
V
CHRG
= 5V
CHRG
Pin Weak Pull-Down
Current
DS8054
Ver1.1
Jan. 2007
5
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