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PDF EUP8054X Data sheet ( Hoja de datos )
| Número de pieza | EUP8054X | |
| Descripción | Standalone Linear Li-Ion Battery Charger | |
| Fabricantes | Eutech Microelectronics | |
| Logotipo |  |
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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
www.DdaiteaStheemetp4Uer.caotumre 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
z Programmable Charge Current Up to 800mA
z No MOSFET, Sense Resistor or Blocking Diode
Required
z Complete Linear Charger in ThinSOT Package for
Single Cell Lithium-ion Batteries
z Constant-Current/Constant-Voltage Operation with
Thermal Regulation to Maximize Charge Rate
Without Risk of Overheating
z Charges Single Cell Li-Ion Batteries Directly from
USB Port
z Preset 4.2V Charge Voltage with ± 1% Accuracy
z Charge Current Monitor Output for Gas Gauging
z Automatic Recharge
z Charge Status Output Pin
z C/10 Charge Termination
z 25µA Supply Current in Shutdown
z 2.9V Trickle Charge Threshold (EUP8054)
z Available Without Trickle Charge (EUP8054X)
z Soft-Start Limits Inrush Current
z Available in TSOT-25, TDFN-6(3mm*3mm)
Package
z RoHS Compliant and 100% Lead (Pb)-Free
APPLICATIONS
z Cellular Telephones/ PDAs/ MP3 Players
z Charging Docks and CradIes
z Bluetooth Applications
DS8054 Ver1.1 Jan. 2007
1
1 page  
EUP8054/8054X
Absolute Maximum Ratings
Input Supply voltage, (Vcc) ------------------------------------------------------------------------- -0.3 to +6.5V
PROG ------------------------------------------------------------------------------------------- -0.3V to VCC +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
www.DEatlaeSchtereitc4Ua.lcoCmharacteristics over Recommended Operating Free-Air Temperature Range
Otherwise specifications are at TA=25 . VCC=5V, unless otherwise noted.
Symbol
Parameter
VCC Input Supply Voltage
ICC Input Supply Current
VFLOAT Regulated Output (Float) Voltage
IBAT BAT Pin Current
Conditions
Charge Mode (Note 4),RPROG = 10k
Standby Mode (Charge Terminated)
Shutdown Mode (RPROG Not
Connected,
VCC < VBAT, or VCC < VUV)
0 ≤ TA ≤ 85 , IBAT = 40mA
RPROG = 10k, Current Mode
RPROG = 2k, Current Mode
Standby Mode, VBAT = 4.2V
Shutdown Mode (RPROG Not
Connected)
Sleep Mode, VCC = 0V
EUP8054
Min. Typ. Max.
4.35 6.5
350 2000
200 500
25 50
4.158 4.2 4.242
100 110 120
475 510 545
0 -2.5 -6
±1 ±2
±1 ±2
ITRIKL
VTRIKL
VTRHYS
VUV
VUVHYS
VMSD
VASD
ITERM
VPROG
Trickle Charge Current
VBAT < VTRIKL, RPROG = 2k (Note 5)
Trickle Charge Threshold Voltage
RPROG = 10k, VBAT Rising (Note 5)
Trickle Charge Hysteresis Voltage RPROG = 10k (Note 5)
VCC Undervoltage Lockout Threshold From VCC Low to High
VCC Undervoltage Lockout Hysteresis
Manual Shutdown Threshold Voltage PROG Pin Rising
VCC – VBAT Lockout Threshold
Voltage
C/10 Termination Current Threshold
PROG Pin Voltage
VCC from Low to High
VCC from High to Low
RPROG = 10k (Note 6)
RPROG = 2k
RPROG = 10k, Current Mode
20 50 70
2.8 2.9 3.0
60 80 110
3.55 3.7 3.85
150 200 300
1.85 1.94 2.05
70 100 140
5 30 50
0.085 0.10 0.115
0.085 0.10 0.115
0.96 1.03 1.10
I CHRG
CHRG Pin Weak Pull-Down
Current
V CHRG = 5V
7 12 20
Unit
V
µA
V
mA
mA
µA
µA
µA
mA
V
mV
V
mV
V
mV
mA/mA
V
µA
DS8054 Ver1.1 Jan. 2007
5
5 Page 
Operation
The EUP8054 is a single cell lithium-ion battery charger
using a constant-current/constant-voltage algorithm. It
can deliver up to 800mA of charge current (using a good
thermal PCB layout) with a final float voltage accuracy
of ± 1%. The EUP8054 includes an internal P-channel
power MOSFET and thermal regulation circuitry. No
blocking diode or external current sense resistor is
required; thus, the basic charger circuit requires only two
external components. Furthermore, the EUP8054 is
capable of operating from a USB power source.
Normal Charge Cycle
A charge cycle begins when the voltage at the VCC pin
rises above the UVLO threshold level and a 1% program
resistor is connected from the PROG pin to ground or
www.DwathaeSnheaetb4Uat.tceormy is connected to the charger output. If the
BAT pin is less than 2.9V, the charger enters trickle
charge mode. In this mode, the EUP8054 supplies
approximately 1/10 the programmed charge current to
bring the battery voltage up to a safe level for full current
charging. (Note: The EUP8054X does not include this
trickle charge feature).
When the BAT pin voltage rises above 2.9V, the charger
enters constant-current mode, where the programmed
charge current is supplied to the battery. When the BAT
pin approaches the final float voltage (4.2V), the
EUP8054 enters constant-voltage mode and the charge
current begins to decrease. When the charge current
drops to 1/10 of the programmed value, the charge cycle
ends.
Programming Charge Current
The charge current is programmed using a single resistor
from the PROG pin to ground. The battery charge current
is 1000 times the current out of the PROG pin. The
program resistor and the charge current are calculated
using the following equations:
R PROG
=
1000V
ICHG
,
ICHG
=
1000V
R PROG
The charge current out of the BAT pin can be determined
at any time by monitoring the PROG pin voltage using
the following equation:
I BAT
=
VPROG
R PROG
• 1000
EUP8054/8054X
Charge Termination
A charge cycle is terminated when the charge current
falls to 1/10th the programmed value after the final float
voltage is reached. This condition is detected by using an
internal, filtered comparator to monitor the PROG pin.
When the PROG pin voltage falls below 100mV for
longer than tTERM (typically 1ms), charging is terminated.
The charge current is latched off and the EUP8054 enters
standby mode, where the input supply current drops to
200µA.
When charging, transient loads on the BAT pin can cause
the PROG pin to fall below 100mV for short periods of
time before the DC charge current has dropped to 1/10th
the programmed value. The 1ms filter time (tTERM) on the
termination comparator ensures that transient loads of
this nature do not result in premature charge cycle termi-
nation. Once the average charge current drops below
1/10th the programmed value, the EUP8054 terminates
the charge cycle and ceases to provide any current
through the BAT pin. In this state, all loads on the BAT
pin must be supplied by the battery.
The EUP8054 constantly monitors the BAT pin voltage
in standby mode. If this voltage drops below the 4.05V
recharge threshold (VRECHRG), another charge cycle
begins and current is once again supplied to the battery.
To manually restart a charge cycle when in standby mode,
the input voltage must be removed and reapplied, or the
charger must be shut down and restarted using the PROG
pin. Figure 7 shows the state diagram of a typical charge
cycle.
Charge Status Indicator ( CHRG )
The charge status output has three different states: strong
pull-down(~10mA), weak pull-down (~12µA) and high
impedance. The strong pull-down state indicates that the
EUP8054 is in a charge cycle. Once the charge cycle has
terminated , the pin state is determined by undervoltage
lockout conditions. A weak pull-down indicates that VCC
meets the UVLO conditions and the EUP8054 is ready to
charge. High impedance indicates that the EUP8054 is in
undervoltage lockout mode: either VCC is less than
100mV above the BAT pin voltage or insufficient voltage
is applied to the VCC pin. A microprocessor can be used
to distinguish between these three states –this method is
discussed in the Applications Information section.
DS8054 Ver1.1 Jan. 2007
11
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet EUP8054X.PDF ] | |
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