ISL9201 Datasheet, PDF (1/8 Pages) Intersil Corporation – Li-ion Battery Charger

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Data Sheet
February 22, 2007
ISL9201
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.
The ISL9201 incorporates ThPermelaimguianradr^Ty^M, which protects
the IC against over-temperature. If the die temperature rises
above a typical value of +110 °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.
Ordering Information
PART
PART
TEMP.
PACKAGE PKG
NUMBER MARKING RANGE (°C) (Pb-free) DWG. #
ISL9201IRZ DLGA
-40 to +85 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.
Features
• Complete Charger for Single-Cell Li-ion/Polymer Batteries
• Integrated Pass Element and Current Sensor
• No External Blocking Diode Required
• Low Component Count and Cost
• 25mV Voltage Accuracy Over-Temperature and Input
Voltage Range
• 20mV Voltage Accuracy at Room Temperature
• Programmable Charge Current
• Charge Current Thermal Foldback for Thermal Protection
(Thermaguard^TM)
• Trickle Charge for Fully Discharged Batteries
• Power Presence and Charge/EOC Indications
• Less than 4µA Leakage Current off the Battery when No
Input Power Attached or Charger Disabled
• Ambient Temperature Range: -40°C to +85°C
• DFN Package
• Pb-Free Plus Anneal Available (RoHS Compliant)
Applications
• Mobile Phones
• Blue-Tooth Devices
• PDAs
• MP3 Players
• Stand-Alone Cradle or Travel Chargers
• Other Handheld Devices
Pinout
ISL9201
(10 LD DFN)
TOP VIEW
VIN 1
GND 2
STATUS 3
TIME 4
GND 5
10 VBAT
9 VSEN
8 IREF
7 V2P8
6 EN
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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