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PDF PT8A2803 Data sheet ( Hoja de datos )
| Número de pieza | PT8A2803 | |
| Descripción | 500mA Li-ion/Polymer Battery Charger | |
| Fabricantes | Pericom Semiconductor | |
| Logotipo |  |
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PT8A2803
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500mA Li-ion/Polymer Battery Charger
Features
• A Constant-Current / Constant-Voltage Linear
Charger for Single-Cell Li-ion/Polymer Batteries
• Integrated Pass Element and Current Sensor
• Highly-Integrated, Requiring No External FETs or
Blocking Diode
• ±0.5% 4.2V Voltage Accuracy at Room
Temperature. ±1% All Temperatures. (Available
with 4.1V and 4.36V options upon request)
• Programmable Charge Current 50mA to 500mA
• Programmable End-Of-Charge Current by Current
Recharge Algorithm
• Pre-Charge for Fully Discharged Batteries
• Less Than 1µA Leakage Current Of the Battery
when No Input Power Attached or Charger Disabled
• Power Present and Charge Status Indications
• Thermal Regulation on Charging Current to Prevent
Over-Heat
• Available with 8-pin 2x3mm TDFN Package
Applications
• Cell-phones, PDA, MP3, MP4, PMP
• Standalone Chargers
• Bluetooth Applications
Description
The PT8A2803 is a fully integrated single-cell Li-
ion/Polymer battery charger. The charger operates in a
constant-current-constant-voltage (CC/CV) charging
profile without employing external FETs and blocking
diodes.
The fast charge current and end-of-charge (EOC) current
can be easily programmed by modifying two external
resistors. When the battery is deeply discharged to lower
than 2.8V, the charger firstly pre-charges the battery
with typically 20% of the programmable fast charge
current. When the charge current is reduced to the
programmed EOC current level (almost works
completely in a constant-voltage (CV) mode), an EOC
indication is displayed through the CHG pins.
PT8A2803 is protected by thermal regulation technology
to prevent the IC from over-heat during charging.
Two status indication pins ( PPR and CHG ), which are
both implemented as an open-drain outputs, can be used
to drive LEDs or work as logic interface to a
microprocessor. When no adapter is attached or when
the charger is disabled, the leakage current from battery
cell is less than 1µA typically.
Ordering Information
Ordering No.
Package
PT8A2803ZEE Lead free and Green 8-pin TDFN
Notes:
z E = Pb-free and Green
z Adding X Suffix= Tape/Reel
12-03-0002
PT0324-1
03/06/12
1
1 page  
PT8A2803
500mA Li-ion/Polymer Battery Charger
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Maximum Ratings
StorageTemperature........................................................................................................................ -65oCto +150oC
SupplyVoltage toGroundPotential (VINPT8A2803)........................................................... -0.3Vto+7.0V
SupplyVoltage to Ground Potential (IMIN/IREF/BAT/ CHG / EN / PPR )............... 0.3Vto+7.0V
Thermal Resistance (Typical for DFN Package) .................................................. θJA (°C/W)=59,
θJC (°C/W)=4.5
Recommended Operating Conditions
Note:
Stresses greater than those listed under
MAXIMUM RATINGS may cause
permanent damage to the device. This is a
stress rating only and functional operation
of the device at these or any other condi-
tions above those indicated in the
operational sec-tions of this specification is
not implied. Exposureto absolute maximum
rating conditions for extended periods may
affect reliability.
Sym
Parameter
Min
Typ
Max
Unit
VIN
Operating Voltage
4.3
-
5.5 V
Programmable Current
-
50 - 500 mA
TA
Operating temperature
-30
-
+85 °C
Electrical Specifications
Typical values are at VIN=5V and TA =25°C. All maximum and minimum values are at TA = -30°C to +85°C, unless otherwise
noted.
Parameter
Sym Conditions
Min Typ Max Units
POWER-ON RESET
Rising POR Threshold
Falling POR Threshold
VPOR
VPOR
VBAT=3.0V, use PPR to indicate the 3.3
output
3.1
3.9 4.3 V
3.6 4.15 V
VIN-VBAT OFFSET VOLTAGE
Rising Edge
Falling Edge
VOS
VOS
VBAT=4.0V, use CHG pin to indicate the -
comparator output
10
90 150 mV
50 - mV
STANDBY CURRENT
BAT pin sink current
DC Supply Current
DC Supply Current
VOLTAGE REGULATION
Output voltage
Power FET “ON” Resistance
ISTBY
IDC
IDC
VCH
RDS(ON)
Charger disabled or the input is floating
Charger disabled
Charger enabled
- 1 - µA
- 300 400 µA
- 500 700 µA
4.3V < VIN<5.5V Charge current=20mA 4.158 4.20 4.242 V
VBAT=3.8V, charge current=0.5A, RIREF
=8kΩ
-
0.6 -
Ω
CHARGE CURRENT
Constant Charge Current
Precharge Charge Current
End of Charge Current
EOC Rising Threshold
ICHG
IPRE
IMIN
IRECHG
RIREF=29.4kΩ, VBAT = 2.8–4.0V
RIREF=29.4kΩ, VBAT = 2.4V
RIMIN=137kΩ
RIREF =29.4kΩ
PRECHARGE CHARGE THRESHOLD
Precharge Threshold Voltage
Precharge Voltage Hysteresis
VPRE
VPREHYS
-
-
INTERNAL TEMPERATURE MONITORING
Thermal regulation threshold (Note)
TFOLD
-
LOGIC INPUT AND OUTPUTS
EN Pin Logic Input High
VENH
-
EN Pin Logic Input Low
VENL
-
EN Pin Internal Pull Down Resistance REN
-
CHG Pin Sink Current When LOW
ICHGOL
VCHG=1V
CHG Pin Leakage Current When HIGH ICHGOH
VCHG=5.5V
PPR Pin Sink Current When LOW
IPPROL
VPPR=1V
PPR Pin Leakage Current When HIGH IPPROH
VPPR=5.5V
Note: This parameter is guaranteed by design, not tested.
135 150 165 mA
18 25 32 mA
20 30 40 mA
90 100 130 mA
2.45 2.55 2.65 V
40 100 150 mV
100 115 130 °C
1.3 -
-V
- - 0.5 V
100 200 400 kΩ
10 20 - mA
- - 1 µA
10 20 - mA
- - 1 µA
12-03-0002
PT0324-1
03/06/12
5
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet PT8A2803.PDF ] | |
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