廬
ISL9201
Data Sheet
February 22, 2007
FN6429.1
Li-ion Battery Charger
The ISL9201 is an integrated single-cell Li-ion or Li-polymer
charger capable of operating at an input voltage as low as
2.5V. The low operating voltage allows the charger to work
with a variety of AC adapters.
The ISL9201 operates as a linear charger when the AC
adapter is a voltage source. The battery is charged in a
standard Li-ion charge profile, i.e. a constant current phase
followed be a constant voltage phase (CC/CV). The charge
current during the constant current phase is determined by the
external resistor connected to the IREF pin. When the adapter
output is a current-limited voltage source and the current limit
is smaller than the programmed constant current of the IC, the
ISL9201 operates as a pulse charger where the charge
current is determined by the current limit of the AC adapter
during the constant current phase. The ISL9201 operates in a
linear mode during the constant voltage phase in both adapter
cases.
Features
鈥?Complete Charger for Single-Cell Li-ion/Polymer Batteries
鈥?Integrated Pass Element and Current Sensor
鈥?No External Blocking Diode Required
鈥?Low Component Count and Cost
鈥?25mV Voltage Accuracy Over-Temperature and Input
Voltage Range
鈥?20mV Voltage Accuracy at Room Temperature
鈥?Programmable Charge Current
鈥?Charge Current Thermal Foldback for Thermal Protection
(Thermaguard
TM
)
鈥?Trickle Charge for Fully Discharged Batteries
鈥?Power Presence and Charge/EOC Indications
鈥?Less than 4碌A(chǔ) Leakage Current off the Battery when No
Input Power Attached or Charger Disabled
鈥?Ambient Temperature Range: -40擄C to +85擄C
鈥?DFN Package
鈥?Pb-Free Plus Anneal Available (RoHS Compliant)
Preliminary
The ISL9201 incorporates Thermaguard
TM
, which protects
the IC against over-temperature. If the die temperature rises
above a typical value of +110 擄C, the thermal foldback function
reduces the charge current to prevent further temperature
rise. The ISL9201 also includes a timer to set the time
reference for the delay time of the end-of-charge (EOC) and
recharge indications. The timer is programmable with an
external capacitor. A logic input and an open-drain logic output
are available for controlling the charger and indicating the
charger status. The EN pin enables the charger. The STATUS
pin is an open-drain output which turns on when the charger is
delivering current. The charger uses a 10 Ld 3x3 DFN
package to maximize thermal conductivity.
Applications
鈥?Mobile Phones
鈥?Blue-Tooth Devices
鈥?PDAs
鈥?MP3 Players
鈥?Stand-Alone Cradle or Travel Chargers
鈥?Other Handheld Devices
Ordering Information
PART
NUMBER
ISL9201IRZ
PART
TEMP.
MARKING RANGE (擄C)
DLGA
-40 to +85
PACKAGE
(Pb-free)
PKG
DWG. #
Pinout
ISL9201
(10 LD DFN)
TOP VIEW
VIN
GND
STATUS
TIME
GND
1
2
3
4
5
10
9
8
7
6
VBAT
VSEN
IREF
V2P8
EN
10 Ld 3x3 DFN L10.3x3
ISL9201IRZ-T DLGA
-40 to +85 10 Ld 3x3 DFN L10.3x3
Tape & Reel
NOTE: Intersil Pb-free plus anneal products employ special Pb-free
material sets; molding compounds/die attach materials and 100%
matte tin plate termination finish, which are RoHS compliant and
compatible with both SnPb and Pb-free soldering operations. Intersil
Pb-free products are MSL classified at Pb-free peak reflow
temperatures that meet or exceed the Pb-free requirements of
IPC/JEDEC J STD-020.
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2007. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
1
2
3
4
5
6
7
8
