Transcript
SE9018 1A Standalone Linear Li-lon Battery Charger Features
Description The SE9018 is a complete constant - current &
Programmable Charge Current Up to 1000mA
constant-voltage linear charger for single cell
No MOSFET, Sense Resistor or Blocking Diode Required
lithium-ion batteries. Its PSOP8 package and low external component count make the SE9018
Complete Linear Charger in SOP-8 Package for Single Cell Lithium-Ion Batteries
ideally suited for portable applications. Further more , the SE9018 can work within USB and wall
Constant-Current/Constant-Voltage
adapter.
Charges Single Cell Li-Ion Batteries Directly from USB Port
No blocking diode is required due to the internal PMOSFET architecture and have prevent
Preset 4.2V Charge Voltage with 1.5% Accuracy
to negative Charge Current Circuit. Thermal feedback regulates the charge current to limit the
Automatic Recharge
die temperature during high power operation or
Two Charge Status Output Pins
high ambient temperature. The charge voltage is
C/10 Charge Termination
fixed at 4.2V, and the charge current can be
2.9V Trickle Charge Threshold
programmed externally with a single resistor. The
Soft-Start Limits Inrush Current
SE9018 automatically terminates the charge cycle
Available Radiator in PSOP8 Package, the Radiator need connect GND or impending
when the charge current drops to 1/10th the programmed value after the final float voltage is
Application
reached.
Charging Docks and Cradles
current
Cellular Telephones, PDAs, GPS
monitor, under voltage lockout, automatic recharge
MP3、MP4 Player
and two status pin to indicate charge termination
Digital Still Cameras, Portable Devices
and the presence of an input voltage.
USB Bus-Powered Chargers, Chargers
SE9018
Other
features
include
Typical Application
Rev1.0 Preliminary and all contents are subject to change without prior notice Page 1
SE9018 1A Standalone Linear Li-lon Battery Charger Pin Configuration
Pin Description Pin
Pin Function Description
Pin
Pin Function Description
BAT
Connect the positive terminal of the battery to BAT pin
Connecting TEMP pin to NTC TEMP
thermistor’s output in Lithium ion battery pack. Constant charge current setting and charge current monitor pin
STDBY
Open Drain Charge Status Output
GND
Ground pin
CHRG
Open Drain Charge Status Output
VCC
Input Voltage pin
PROG
CE
Chip Enable Input
Absolute Maximum Rating Parameter
Symbol
Value
Units
Input Supply Voltage
Vin
6.5
V
BAT Voltage
VBAT+
6.5
V
TEMP/CE
VTEMP
6.5
V
CHRG / STDBY
VCHRG
6.5
V
BAT Pin Current
IBAT
1500
mA
PROG Pin Current
IPROG
1500
uA
150
°C
Maximum Junction Temperature
Rev1.0 Preliminary and all contents are subject to change without prior notice Page 2
SE9018 1A Standalone Linear Li-lon Battery Charger Operating Rating Parameter
Value
Units
Junction Temperature
-20℃～85
℃
Storage Temperature
-40℃～125
℃
Lead Temperature (Soldering, 10 sec)
260±5
℃
Package
Remarks
Ordering Information Part Number SE9018-LF
Marking Information SE9018 YYWW-LF
YYWW means PSOP8
Production batch XX=LF: Lead Free.
Functional Block Diagram
Rev1.0 Preliminary and all contents are subject to change without prior notice Page 3
SE9018 1A Standalone Linear Li-lon Battery Charger Electrical Characteristics VIN = 5V; TJ = 25°C; unless otherwise specified. Symbol V CC
Parameter
Conditions
Input Supply Voltage
Min
Typ
Max
Unit
4.0
5
6.5
V
Charge Mode，RPROG=2K Standby Mode
ICC
Input Supply Current
(Charge Terminated) Shutdown Mode (RPROG Not Connected,
146
μA
70
μA
30
μA
VCC < VBAT, or VCC < VUV)
VFLOAT
IBAT
Regulated Output Voltage
BAT Pin Current
IBAT = 30mA, RPROG=10K
4.137
4.2
4.263
V
RPROG=2K，Current Mode
560
mA
RPROG=1K，Current Mode
1120
mA
Standby Mode VBAT=4.3V
－1
μA
Shutdown Mode(RPROG Not Connected)
±1
μA
Sleep Mode，VCC=0V
－1
μA
ITRIKL
Trickle Charge Current
VBAT
