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PDF ISL9211A Data sheet ( Hoja de datos )
| Número de pieza | ISL9211A | |
| Descripción | Charging System Safety Circuit | |
| Fabricantes | Intersil Corporation | |
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Data Sheet
April 2, 2009
ISL9211A
FN6702.0
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
INPUT
C1
VIN
OUT
C2
ISL6292
BATTERY
CHARGER
RILIM
ISL9211A
ILIM VB
EN
GND
FAULT
RVB
DISA
ENA
BATT
PACK
Ordering Information
PART NUMBER
TEMP PACKAGE
PART RANGE Tape & Reel PKG.
MARKING (°C)
(Pb-free) DWG. #
ISL9211AIRU48XZ-T* 4XE
-40 to +85 8 Ld µTDFN L8.2x2B
ISL9211AIRU58XZ-T* 5XX
-40 to +85 8 Ld µTDFN L8.2x2B
ISL9211AIRU68XZ-T* 6XX
-40 to +85 8 Ld µTDFN L8.2x2B
*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.
Features
• 24V Max Input Voltage
• Supports Up To 2.0A Input Current
• Fully Integrated Protection Circuit for Three Protected
Variables
• 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
Processing Moisture Sensitive Surface Mount Devices
(SMDs)”
• Technical Brief TB379 “Thermal Characterization of
Packaged Semiconductor Devices”
• Technical Brief TB389 “PCB Land Pattern Design and
Surface Mount Guidelines for QFN Packages”
Pinout
ISL9211A
(8 LD µTDFN)
TOP VIEW
VIN 1
GND 2
NC 3
FAULT 4
8 OUT
7 ILIM
6 VB
5 EN
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 Inc.
Copyright © Intersil Americas Inc. 2009. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.
1 page  
ISL9211A
www.TDaytapSihceaetl4UO.cpomerating Performance The test conditions for the Typical Operating Performance are: VIN = 5V, TA = +25°C,
RILIM = 24.9kΩ, RVB = 200kΩ, Unless Otherwise Noted. (Continued)
VVINN((22VV//dDivIV) )
VIVNIN(2(2VV/D/dIiVv))
OOUUTT((22VV/d/DivIV) )
FAFaUuLlTt(5(5VV/d/DivI)V)
TIME - 2s/DIV
FIGURE 4. CAPTURED WAVEFORMS WHEN THE INPUT
GRADUALLY RISES TO THE INPUT
OVERVOLTAGE THRESHOLD
OUOTUT(2(2VV//DdIivV))
FAUFLaTul(t5(5VV/D/dIiVv))
TIME - 4ms/DIV
FIGURE 5. TRANSIENT WHEN THE INPUT VOLTAGE STEPS
FROM 6.5V TO 5.5V
VVIINN(5(5VV/d/iDv)IV)
OOUUTT((22VV/d/DivI)V)
FAFUaLuTlt((22VV/d/iDv)IV)
TIME - 40µs/DIV
FIGURE 6. TRANSIENT WAVEFORMS WHEN INPUT STEPS
FROM 0V TO 9V
VVININ((55VV//dDivI)V)
LLoOadAcDurCreUntR(R2AE/dNivT) (2A/DIV)
FAFaUuLlt(T2V(/2dViv/)DIV)
VVIINN((11VV//dDiIvV))
VVBB((11VV//dDivIV) )
OOUUTT(1(1VV/d/DivI)V)
FFAaUulLt(T2V(2/dVi/vD)IV)
TIME - 20s/DIV
FIGURE 7. BATTERY OVERVOLTAGE PROTECTION. THE IC
IS LATCHED OFF AFTER 16 COUNTS OF
PROTECTION. VB VOLTAGE VARIES BETWEEN
4.3V TO 4.5V
VVINN(5(V5/Vd/ivD) IV)
Load current (2A/div)
LOAD CURRENT (2A/DIV)
FAUFLaTult((22VV//dDivIV)
TIME - 40µs/DIV
FIGURE 8. POWER-UP WAVEFORMS WHEN OUTPUT IS
SHORT-CIRCUITED
5
TIME - 1ms/DIV
FIGURE 9. ZOOMED-IN VIEW OF FIGURE 8
FN6702.0
April 2, 2009
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet ISL9211A.PDF ] | |
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