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PDF CE3150 Data sheet ( Hoja de datos )
| Número de pieza | CE3150 | |
| Descripción | Standalone Linear Li-Ion battery charger | |
| Fabricantes | Chipower | |
| Logotipo |  |
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Standalone Linear Li-Ion battery charger with
Thermal Regulation
CE3150 Series
INTRODUCTION:
The CE3150 is a complete constant-current
constant-voltage linear charger for single cell
Li-Ion batteries. It’s SOT package and low external
component count make the CE3150 especially
well-suit for portable applications. Furthermore,
the CE3150 is specifically designed to work within
USB Power specifications.
No external sense resistor is needed and no
blocking diode is required due to internal MOSFET
architecture. Thermal feedback regulates the
charge current to limit the die temperature. The
charge voltage is fixed at 4.2V and the charge
current can be programmed externally with a
single resistor. The CE3150 automatically
terminates the charge cycle when the charge
current drops to 1/10th the programmed value
after the final float voltage is reached. The
CE3150 automatically re-starts the charge if the
battery voltage falls below an internal threshold.
FEATURES:
z Programmable Charge Current Up to 800mA
z No External MOSFET, Sense Resistor or
Blocking Diode Required
z Charges Single Cell Li-Ion Batteries Directly
from USB Port
z Preset 4.2V Charge Voltage with ±1%
Accuracy
z Constant-Current/Constant-Voltage
Operation with Thermal Regulation to
Maximize Charge Rate Without Risk of
Overheating
z Charge Status Output Pin
z 30μA Shutdown Current
z 70μA Standby Current
z Complete Linear Charger in SOT23-5
Package for Single Cell Lithium-Ion Batteries
z C/10 Charge Termination
z Soft-Start Limits Inrush Current
z Automatic Recharge
APPLICATIONS：
z Cellular Telephones, PDAs
z Charging Docks and Cradles
z Portable MP3 Players
z Bluetooth Applications
PIN CONFIGURATION:
ORDER INFORMATION:
CE3150①②
DESIGNATOR
①
②
SYMBOL
A
M
DESCRIPTION
Standard
Package：SOT-23-5L
V1.0
1(9)
1 page  
Standalone Linear Li-Ion Battery Charger with Thermal Regulation
CE3150 Series
Figure1 Basic Application Circuit
OPERATION
The CE3150 is a standalone linear Li-on
battery charger with thermal regulation. It can
deliver up to 800mA of charge current (using a
good thermal PCB layout) with a final float voltage
accuracy of ±1%.
No blocking diode or external current sense
resistor is required. 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. If the
BAT pin is less than 2.9V, the charger enters
trickle charge mode. In this mode, the CE3150
supplies approximately 1/10 the programmed
charge current to bring the battery voltage up to a
safe level for full current charging. 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 CE3150 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.
After a charge cycle is complete and charging
operation is terminated, the CE3150 keeps
monitoring the BAT voltage. If the battery voltage
drops below 4.05V, a recharge cycle will begin. To
manually restart the charge cycle, the input
voltage must be removed and reapplied, or the
charger must be shut down and restarted by
momentarily floating the PROG pin.
APPLICATION INFORMATION
PROGRAMMING CHARGE CURRENT
out of the PROG pin. The program resistor and
The charge current is programmed using a the charge current are calculated using the
single resistor from the PROG pin to ground. The
battery charge current is 1200 times the current
following equations:
RPROG
=
V
ICHG
IPROG =RPROVG
V1.0
5(9)
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet CE3150.PDF ] | |
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