isl9211a Intersil Corporation, isl9211a Datasheet

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isl9211a

Manufacturer Part Number
isl9211a
Description
Charging System Safety Circuit
Manufacturer
Intersil Corporation
Datasheet

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Charging System Safety Circuit
The ISL9211A is an integrated circuit (IC) optimized to
provide a redundant safety protection to a Li-ion battery
charging system. The IC monitors the input voltage, the
battery voltage, and the charge current. When any of the
three parameters exceeds its limit, the IC turns off an internal
N-channel MOSFET to remove the power from the charging
system to the battery. In addition to the above protected
parameters, the IC also monitors its own internal
temperature and turns off the N-channel MOSFET when the
temperature exceeds +150°C. Together with the battery
charger IC and the protection module in a battery pack, the
charging system using the ISL9211A has triple-level
protection and is two-fault tolerant.
The IC is designed to turn on the internal NFET slowly to
avoid inrush current at power up but will turn off the NFET
quickly when the input is overvoltage in order to remove the
power before any damage occurs. The ISL9211A has a logic
flag output to indicate a fault condition. The enable input
allows the system to cut off the input power if needed.
Typical Application Circuit
Ordering Information
ISL9211AIRU48XZ-T* 4XE
ISL9211AIRU58XZ-T* 5XX
ISL9211AIRU68XZ-T* 6XX
*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
NiPdAu plate - e4 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.
INPUT
PART NUMBER
R
C
ILIM
1
VIN
ILIM
GND
MARKING
ISL9211A
PART
¬
FAULT
OUT
1
VB
EN
-40 to +85 8 Ld µTDFN L8.2x2B
-40 to +85 8 Ld µTDFN L8.2x2B
-40 to +85 8 Ld µTDFN L8.2x2B
RANGE
TEMP
C
(°C)
Data Sheet
2
R
VB
Tape & Reel
DISA
ENA
PACKAGE
CHARGER
BATTERY
(Pb-free)
ISL6292
BATT
PACK
1-888-INTERSIL or 1-888-468-3774
DWG. #
PKG.
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Features
• 24V Max Input Voltage
• Supports Up To 2.0A Input Current
• Fully Integrated Protection Circuit for Three Protected
• High Accuracy Protection Thresholds
• User Programmable Overcurrent Protection Threshold
• Responds To Input Overvoltage in Less Than 1µs
• High Immunity of False Triggering Under Transients
• Fault Indication for Various Fault Occurrence
• Easy to Use
• Pb-Free (RoHS Compliant)
Applications
• Cell Phones
• Digital Still Cameras
• PDAs and Smart Phones
• Portable Instruments
• Desktop Chargers
Related Literature
• Technical Brief TB363 “Guidelines for Handling and
• Technical Brief TB379 “Thermal Characterization of
• Technical Brief TB389 “PCB Land Pattern Design and
Pinout
Variables
Processing Moisture Sensitive Surface Mount Devices
(SMDs)”
Packaged Semiconductor Devices”
Surface Mount Guidelines for QFN Packages”
All other trademarks mentioned are the property of their respective owners.
April 2, 2009
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
FAULT
Copyright © Intersil Americas Inc. 2009. All Rights Reserved.
GND
VIN
NC
(8 LD µTDFN)
1
2
3
4
TOP VIEW
ISL9211A
8
7
6
5
OUT
ILIM
VB
EN
ISL9211A
FN6702.0

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isl9211a Summary of contents

Page 1

... NFET quickly when the input is overvoltage in order to remove the power before any damage occurs. The ISL9211A has a logic flag output to indicate a fault condition. The enable input allows the system to cut off the input power if needed. ...

Page 2

... Maximum Storage Temperature Range . . . . . . . . . .-65°C to +150°C Pb-free Reflow Profile . . . . . . . . . . . . . . . . . . . . . . . . .see link below http://www.intersil.com/pbfree/Pb-FreeReflow.asp SYMBOL TEST CONDITIONS V Rising POR Falling 24.9k VIN ILIM ISL9211ARU48 OVP ISL9211ARU58 ISL9211ARU68 ISL9211ARU48 ISL9211ARU58 ISL9211ARU68 3V 24.9kΩ OCP VB ILIM 12.4kΩ MAX ILIM BT OCP V BOVP BT BOVP ...

Page 3

... MIN TYP MAX UNITS - - 0 200 - kΩ - 0.4 0 1.5 µA - 170 280 mΩ VIN OUT ISL6292 BATTERY CHARGER C 2 ISL9211A ILIM DISA EN ENA BATT GND FAULT PACK DESCRIPTION 24.9kΩ 200kΩ to 1MΩ 1µF/25V X5R ceramic capacitor FN6702.0 April 2, 2009 ...

Page 4

... Typical Operating Performance VIN(2V/div OUT (2V/DIV) OUT(2V/div) LOAD CURRENT (200mA/DIV) Load Current(200mA/div) TIME - 4ms/DIV FIGURE 2. CAPTURED WAVEFORMS FOR POWER-UP. THE OUTPUT IS LOADED WITH A 10Ω RESISTOR 4 ISL9211A ...

Page 5

... LOAD CURRENT (2A/DIV) Load current (2A/div) FAULT (2V/DIV) Fault(2V/div) TIME - 40µs/DIV FIGURE 8. POWER-UP WAVEFORMS WHEN OUTPUT IS SHORT-CIRCUITED 5 ISL9211A The test conditions for the Typical Operating Performance are 24.9kΩ 200kΩ, Unless Otherwise Noted. (Continued) ILIM VB (2V/DIV) FIGURE 5. TRANSIENT WHEN THE INPUT VOLTAGE STEPS FIGURE 7 ...

Page 6

... TEMPERATURE (°C) FIGURE 12. OVERCURRENT PROTECTION vs TEMPERATURE AT VARIOUS INPUT VOLTAGES FIGURE 14. ON-RESISTANCE vs TEMPERATURE AT DIFFERENT INPUT VOLTAGES 6 ISL9211A The test conditions for the Typical Operating Performance are 24.9kΩ 200kΩ, Unless Otherwise Noted. (Continued) ILIM FIGURE 11. INPUT OVERVOLTAGE PROTECTION vs ...

Page 7

... ISL9211A turned off permanently, as shown in Figure 7. Recycling the input power will reset the counter and restart the ISL9211A. The resistor between the VB pin and the battery, R shown in the Typical Applications circuit important component. This resistor provides a current limit in case the VB pin is shorted to the input voltage under a failure mode ...

Page 8

... AC adapter is inserted live (hot insertion) and the second one is when the current in the power NFET of the ISL9211A has a step-down change. Figure 16 shows an equivalent circuit for the ISL9211A input. The cable between the AC/DC converter output and the handheld system input has a parasitic inductor. The parasitic (EQ ...

Page 9

... In practice, the input decoupling capacitor is recommended to use a 25V, X5R dielectric ceramic capacitor with a value between 0.1µF to 1µF. The output of the ISL9211A and the input of the charging circuit typically share one decoupling capacitor. The selection of that capacitor is mainly determined by the requirement of the charging circuit. When using the ISL6292 family chargers, a 1µ ...

Page 10

... LEAD MICRO THIN DUAL FLAT NO-LEAD PLASTIC PACKAGE (µTDFN) WITH E-PAD Rev 0, 04/08 2.00 6 PIN 1 INDEX AREA (4X) 0.15 TOP VIEW PACKAGE OUTLINE ( 6x0. 8x0.25 ) 0.90 2.00 TYPICAL RECOMMENDED LAND PATTERN 10 ISL9211A 0.25±0.050 ( 8x0. MAX ( 8x0.30 ) 1.60 2.00 C NOTES: 1. Dimensions are in millimeters. Dimensions ...

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