ISL6294 Intersil, ISL6294 Datasheet

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ISL6294

Manufacturer Part Number
ISL6294
Description
High Input Voltage Charger
Manufacturer
Intersil
Datasheet

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High Input Voltage Charger
The ISL6294 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
6.8V, to prevent excessive power dissipation. The 28V rating
eliminates the overvoltage protection circuit required in a low
input voltage charger.
The charge current and the end-of-charge (EOC) current are
programmable with external resistors. When the battery
voltage is lower than typically 2.55V, the charger
preconditions the battery with typically 20% of the
programmed charge current. When the charge current
reduces to the programmable EOC current level during the
CV charge phase, an EOC indication is provided by the CHG
pin, which is an open-drain output. An internal thermal
foldback function protects the charger from any thermal
failure.
Two indication pins (PPR and CHG) allow simple interface to
a microprocessor or LEDs. When no adapter is attached or
when disabled, the charger draws less than 1µA leakage
current from the battery.
Ordering Information
NOTE: Intersil Pb-free 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.
ISL6294IRZ (Note)
ISL6294IRZ-T (Note)
NUMBER
PART
RANGE (°C)
-40 to 85
-40 to 85
TEMP.
®
1
8 Ld 2x3 DFN
(Pb-free)
8 Ld 2x3 DFN
(Pb-free)
Data Sheet
PACKAGE
L8.2x3
L8.2x3
DWG. #
PKG.
1-888-INTERSIL or 1-888-352-6832
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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
• Programmable End-of-Charge Current
• Charge Current Thermal Foldback for Thermal
• Trickle Charge for Fully Discharged Batteries
• 28V Maximum Voltage for the Power Input
• Power Presence and Charge Indications
• Less Than 1µA Leakage Current off the Battery When No
• Ambient Temperature Range: -40°C to 85°C
• 2x3 DFN-8 Packages
• Pb-Free Available (RoHS Compliant)
Applications
• Mobile Phones
• Blue-Tooth Devices
• PDAs
• MP3 Players
• Stand-Alone Chargers
• Other Handheld Devices
Pinout
Protection
Input Power Attached or Charger Disabled
February 18, 2005
All other trademarks mentioned are the property of their respective owners.
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
CHG
PPR
VIN
EN
1
2
3
4
Copyright Intersil Americas Inc. 2005. All Rights Reserved
DFN 8 LEAD
TOP VIEW
8
7
6
5
BAT
IREF
IMIN
GND
ISL6294
FN9174.0

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ISL6294 Summary of contents

Page 1

... Data Sheet High Input Voltage Charger The ISL6294 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 6 ...

Page 2

... End-of-Charge Current EOC Rising Threshold PRECONDITIONING CHARGE THRESHOLD Preconditioning Charge Threshold Voltage Preconditioning Voltage Hysteresis 2 ISL6294 Thermal Information Thermal Resistance DFN Package (Notes Maximum Junction Temperature (Plastic Package 150°C Maximum Storage Temperature Range . . . . . . . . . . . -65°C to 150°C Maximum Lead Temperature (Soldering 10s 300°C ...

Page 3

... When this pin is driven to LOW or left floating, the charger is enabled. This pin has an internal 200kΩ pull-down resistor. GND - System ground. IMIN - End-of-charge (EOC) current program pin. Connect a resistor between this pin and the GND pin to set the EOC 3 ISL6294 SYMBOL TEST CONDITIONS T FOLD Pin Voltage = ...

Page 4

... ISL6294 BAT VIN R IREF IREF IMIN R IMIN ISL6294 CHG PPR EN GND PART BAT VIN IREF IMIN ISL6294 EN CHG GND PPR TO BATTERY COMPONENT DESCRIPTION FOR FIGURE 2 DESCRIPTION C 1µF X5R ceramic cap 1 C 1µF X5R ceramic cap 2 24.3kΩ ...

Page 5

... I REF 2.55V 19%I REF CHG Description The ISL6294 charges a Li-ion battery using a CC/CV profile. The constant current I is set with the external resistor REF R (See Figure 1) and the constant voltage is fixed at IREF 4.2V. If the battery voltage is below a typical 2.55V trickle- charge threshold, the ISL6294 charges the battery with a ...

Page 6

... Operation Without the Battery The ISL6294 relies on a battery for stability and is not guaranteed to be stable if the battery is not connected. With a battery, the charger will be stable with an output ceramic decoupling capacitor in the range of 1µ ...

Page 7

... USB port. The input voltage ranges from 4.25V to 6.5V under full-load and unloaded conditions. The ISL6294 can withstand up to 28V on the input without damaging the IC. If the input voltage is higher than typically 6.8V, the charger stops charging. ...

Page 8

... However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see www.intersil.com 8 ISL6294 L8.2x3 0.15 C ...

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