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PDF AP5057 Data sheet ( Hoja de datos )
| Número de pieza | AP5057 | |
| Descripción | 1A Linear Li-Ion Battery Charger | |
| Fabricantes | Chipown | |
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AP5057
Chipown
Using SOP8 package
1A Linear Li-Ion Battery Charger
General Description
The AP5057 is a complete constant current & constant
voltage linear charger for single cell lithium-ion batteries.
Its SOP package and low external component count
make the AP5057 ideally suited for portable applications.
Furthermore, the AP5057 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
AP5057 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 AP5057 automatically enters a low current
state, dropping the battery drain current to less than 2uA.
The AP5057 can be put into shutdown mode, reducing
the supply current to 50uA.
Other features include Battery temperature monitor,
under-voltage lockout, automatic recharge and two status
pins to indicate charge and charge termination.
Features
z Programmable Charge Current Up to 1000mA
z No MOSFET, Sense Resistor or Blocking Diode
Required
z Complete Linear Charger in SOP 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
z Charge Current Monitor Output for Gas Gauging
z Automatic Recharge
z Charge state pairs of output, no battery and fault
status display
z C/10 Charge Termination
z 50uA Supply Current in Shutdown
z 2.9V Trickle Charge Threshold
z Soft-Start Limits Inrush Current
z Battery temperature monitoring function
z Available in SOP8-PP Package
Package
SOP8-PP
Applications
z Cellular Telephones, PDAs, MP3 /MP4 Players
z Charging Docks and Cradles
z Bluetooth 、GPS Applications
Typical Application Circuit
Figure 1. Basic Application Circuit with AP5057
8/F, ChuangYuan Building No.21-1 Changjiang Road, Wuxi New Destrict Tel: +86(510)8521-7718 http://www.chipown.com.cn
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1 page  
AP5057
Ordering Information
Part Number
AP5057SPER
1. XXXX= date code
Mark
AP5057
XXXX1
Chipown
Package
SOP8-PP
Pin Function
TEMP (Pin 1): Battery temperature detection input. TEMP pin to receive the battery NTC sensor output. If the TEMP
pin voltage is less than the input voltage is greater than 45% or 80% of the input voltage means the battery temperature
is too low or too high, then the charge has been suspended.
If the TEMP direct access GND, battery temperature detection canceled, the other charged and functioning properly.
PROG (Pin 2): Charge Current Program, Charge Current Monitor and Shutdown Pin. The charge current is
programmed by connecting a 1% resistor, RPROG, to ground. When charging in trickle-current mode, this pin servos to
0.1V.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:
IBAT = (VPROG/RPROG) • 1000.
The PROG pin can also be used to shut down the charger. Disconnecting the program resistor from ground allows a 3uA
current to pull the PROG pin high. When it reaches the 1.21V shutdown threshold voltage, the charger enters shutdown
mode, charging stops and the input supply current drops to 50uA. This pin is also clamped to approximately 2.4V.
Driving this pin to voltages beyond the clamp voltage will draw currents as high as 1.5mA. Reconnecting RPROG to
ground will return the charger to normal operation.
GND (Pin 3): Ground.
VCC (Pin 4): Positive Input Supply Voltage. Provides power to the charger, VCC can range from 4.25V to 6.5V and
should be bypassed with at least a 10uF capacitor. When VCC drops to within 30mV of the BAT pin voltage, the
AP5057 enters shutdown mode, dropping IBAT to less than 2uA.
BAT (Pin 5): 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.
STDBY (Pin 6): The completion of battery charging instructions side. When the battery charge is complete, STDBY
pulled low by internal switches, indicating the completion of charging. In addition, STDBY pin will be in a
high-impedance state.
CHRG (Pin 7): 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, CHRG pin will be in a high-impedance state.
CE (Pin 8): Chip enable input. High input level would AP5057 is in normal working condition; low input level so that
AP5057 is prohibited charging status. CE pin can be TTL or CMOS level-level driver.
8/F, ChuangYuan Building No.21-1 Changjiang Road, Wuxi New Destrict Tel: +86(510)8521-7718 http://www.chipown.com.cn
V2.0
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5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet AP5057.PDF ] | |
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