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PDF ISL9222A Data sheet ( Hoja de datos )
| Número de pieza | ISL9222A | |
| Descripción | High Input Voltage Charger | |
| Fabricantes | Intersil | |
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Data Sheet
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July 28, 2008
ISL9222A
FN6704.0
High Input Voltage Charger
The ISL9222A is a cost-effective, fully integrated high input
voltage single-cell Li-ion battery charger. The charger uses a
CC/CV charge profile required by Li-ion batteries. The
charger accepts an input voltage up to 28V but is disabled
when the input voltage exceeds the OVP threshold, typically
7.2V, to prevent excessive power dissipation. The 28V rating
eliminates the overvoltage protection circuit required in a low
input voltage charger.
The charge current is user programmable with an external
resistor. When the battery voltage is lower than typically
2.55V, the charger preconditions the battery with typically
20% of the programmed charge current. An internal thermal
foldback function protects the charger from any thermal
failure.
AN indication pin PPR allows simple interface to a
microprocessor or LED. When no adapter is attached or
when disabled, the charger draws less than 1µA leakage
current from the battery.
Ordering Information
PART
NUMBER
(Note)
TEMP.
PART RANGE
MARKING (°C)
PACKAGE PKG.
(Pb-Free) DWG. #
ISL9222AIRTZ-T 22A
-40 to +85 8 Ld 2x3 TDFN L8.2x3A
Tape and Reel
*Please refer to TB347 for details on reel specifications.
NOTE: These Intersil Pb-free plastic packaged products employ
special Pb-free material sets, molding compounds/die attach
materials, and 100% matte tin plate plus anneal (e3 termination
finish, which is 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
• 1% Voltage Accuracy
• Programmable Charge Current
• Charge Current Thermal Foldback for Thermal
Protection
• Trickle Charge for Fully Discharged Batteries
• 28V Maximum Voltage for the Power Input
• Power Presence Indication
• Less Than 1µA Leakage Current off the Battery When No
Input Power Attached or Charger Disabled
• Ambient Temperature Range: -40°C to +85°C
• 8 Ld 2x3 TDFN Package
• Auxiliary OR-gate For System Booting Logic
• Pb-Free (RoHS Compliant)
Applications
• Mobile Phones
• Blue-Tooth Devices
• PDAs
• MP3 Players
• Stand-Alone Chargers
• Other Handheld Devices
Pinout
ISL9222A
(8 LD TDFN)
TOP VIEW
VIN 1
PPR 2
JIGON 3
EN 4
8 BAT
7 IREF
6 JIGIN
5 GND
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 LLC.
Copyright Intersil Americas LLC. 2008. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
1 page  
ISL9222A
VIN
POR
PPR
EN
GND
OVP
PRE
REG
VOS
BAT
200k
240k
VREF VCC
BAT
CHARGE
CONTROL
EN
VREF
VCC
DIE
TEMP
+115OC
JIGIN
JIGON
IREF
FIGURE 1. BLOCK DIAGRAM
BAT
4.2V
IREF
TRICKLE
CC
CV
CHARGE
VOLTAGE
2.55V
19% IREF
CHARGE
CURRENT
FIGURE 2. TYPICAL CHARGE PROFILE
TIME
Description
The ISL9222A charges a Li-ion battery using a CC/CV
profile. The constant current IREF is set with the external
resistor RIREF (See Typical Applications circuit on page 4)
and the constant voltage is fixed at 4.2V. If the battery
voltage is below a typical 2.55V trickle-charge threshold, the
ISL9222A charges the battery with a trickle current of 19% of
IREF until the battery voltage rises above the trickle charge
5
threshold. Fast charge CC mode is maintained at the rate
determined by programming IREF until the cell voltage rises
to 4.2V. When the battery voltage reaches 4.2V, the charger
enters a CV mode and regulates the battery voltage at 4.2V
to fully charge the battery without the risk of over charge.
The charger will continue to output the 4.2V voltage until the
FN6704.0
July 28, 2008
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet ISL9222A.PDF ] | |
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