Battery Charger. ISL9228 Datasheet

ISL9228 Charger. Datasheet pdf. Equivalent

ISL9228 Datasheet
Recommendation ISL9228 Datasheet
Part ISL9228
Description Dual Input Li-ion/Li-Polymer Battery Charger
Feature ISL9228; DATASHEET ISL9228 Dual Input Li-ion/Li-Polymer Battery Charger With Battery Removal Detection FN66.
Manufacture Renesas
Datasheet
Download ISL9228 Datasheet




Renesas ISL9228
DATASHEET
ISL9228
Dual Input Li-ion/Li-Polymer Battery Charger With Battery Removal Detection
FN6687
Rev 0.00
February 13, 2009
The ISL9228 is a fully integrated low-cost single-cell Li-ion or
Li-polymer battery charger. The charger accepts two power
inputs, normally one from a USB (Universal Serial Bus) port
and the other from a desktop cradle. The ISL9228 is an ideal
charger for smart handheld devices that need to
communicate with a personal computer via USB.
The ISL9228 features 28V maximum voltages for both the
cradle and the USB inputs. Due to the 28V rated inputs, low-
cost, large output tolerance adapters can be used safely.
The 28V rating eliminates the over voltage protection circuit
required in a low input voltage charger.
When both inputs are powered, the cradle input is used to
charge the battery. The charge current is programmable for
the cradle input with a small resistor. The end-of-charge
current is also programmable by another external resistor.
The charger incorporates Thermaguard™ which protects the
IC against over temperature. If the die temperature rises
above a typical value of +125°C, a thermal foldback function
reduces the charge current automatically to prevent further
temperature rise. The charger has two indication pins. The
PPR (power present) pin outputs an open-drain logic LOW
when either the cradle or the USB input power is attached.
The CHG (charge) pin is also an open-drain output that
indicates a logic LOW when the charge current is above a
minimum current level. When the charge current is below the
preset minimum current, the CHG pin will turn to logic high to
indicate the end-of-charge condition.
Ordering Information
PART
NUMBER
(Note)
PART
MARKING
TEMP.
RANGE
(°C)
PACKAGE PKG.
(Pb-free) DWG. #
ISL9228IRZ 9228
-40 to +85 10 Ld 3x3 DFN L10.3x3C
ISL9228IRZ-T 9228
-40 to +85 10 Ld 3x3 DFN L10.3x3C
Tape and 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
• Dual Input Power Sources for Cradle and USB
• Battery Removal Detection
• Integrated Pass Elements
• Fixed 380mA USB Charge Current
• Programmable Cradle Charge Current
• Charge Current Thermaguard™ for Thermal
Protection
• 28V Maximum Voltages for Cradle and USB Inputs
• 1% Constant Voltage Accuracy
• Adapter Presence and Charge Indications
• Less than 0.5µA Leakage Current off the Battery when No
Input Power Attached
• Programmable End-of-Charge Current
• Ambient Temperature Range: -40°C to +85°C
• No External Blocking Diode Required
• Pb-Free (RoHS Compliant)
Applications
• Smart Handheld Devices
• Cell Phones, PDAs, MP3 Players
• Digital Still Cameras
• Handheld Test Equipment
Related Literature
• Technical Brief TB363 “Guidelines for Handling and
Processing Moisture Sensitive Surface Mount Devices
(SMDs)”
• Technical Brief TB389 “PCB Land Pattern Design and
Surface Mount Guidelines for QFN Packages”
Pinout
ISL9228
(10 LD DFN)
TOP VIEW
CRDL 1
USB 2
PPR 3
CHG 4
EN 5
10 BAT
9 ICDL
8 GND
7 VF
6 IMIN
FN6687 Rev 0.00
February 13, 2009
Page 1 of 11



Renesas ISL9228
ISL9228
Block Diagram
CRDL
USB
OVP
SHUTDOWN
BAT
ICDL
IMIN
PPR
CHG
TEMP
MONITOR
CPPR
REFERENCE
CURRENT
CONTROL
IR
CPPR
LBAT USB CRDL BAT
+
VA
-
VREF
EN
PPR
CHG
CONTROL
SHUTDOWN
VCC
1000k
EN
GND
VF
FN6687 Rev 0.00
February 13, 2009
Page 2 of 11



Renesas ISL9228
ISL9228
Typical Applications
TO AC ADAPTER
TO USB
CONNECTOR
C1
R1
C2
R2
CRDL
USB
RIMIN
IMIN
BAT
ICDL
RICDL
R3 R4
C3 BATT
EN
PPR
DISABLE
ENABLE
D1
D2
+
CHG
VF
RF
GND
RICDL
RIMIN
R3, R4
RF
C1, C2, C3
R1, R2
D1, D2
COMPONENT SELECTION
12.4kfor 0.55A cradle charge current
10kfor 55mA end-of-charge current
350
ID Resistor, typically 20k
1µF ceramic capacitor
1
LEDs
FN6687 Rev 0.00
February 13, 2009
Page 3 of 11







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