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| Charging System Safety Circuit |
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| Ordering Information |
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 iBuy direct from Intersil
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 iBuy direct - out of stock
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 Request samples
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 Check distributor inventory
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Available in RoHS/Pb-Free
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Part No. |
Design-In
Status |
Temp. |
Package |
MSL |
Price
US $ |
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| ISL9209BIRZ |
Active |
Ind |
12 Ld TDFN |
2 |
0.53 |
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| ISL9209BIRZ-T |
Active |
Ind |
12 Ld TDFN T+R |
2 |
0.55 |
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| The price listed is the manufacturer's suggested retail price for quantities of 1K units. However, prices in today's market are fluid and may change without notice. |
| MSL = Moisture Sensitivity Level - per IPC/JEDEC J-STD-020 |
| SMD = Standard Microcircuit Drawing |
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 Description |
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The ISL9209B is an integrated circuit (IC) optimized to provide a redundant safety protection to a Li-ion battery from failures of a 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 P-Channel MOSFET to remove the power from the charging system. In addition to the above protected parameters, the IC also monitors its own internal temperature and turns off the P-Channel MOSFET when the temperature exceeds +140°C. Together with the battery charger IC and the protection module in a battery pack, the charging system using the ISL9209B has triple-level protection and is two-fault tolerant.
The IC is designed to turn on the internal PFET slowly to avoid inrush current at power up but will turn off the PFET quickly when the input is overvoltage in order to remove the power before any damage occurs. The ISL9209B has a logic warning output to indicate the fault and an enable input to allow the system to remove the input power. |
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 Key Features |
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Fully Integrated Protection Circuit for Three Protected Variables
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High Accuracy Protection Thresholds
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User Programmable Overcurrent Protection Threshold
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Input Overvoltage Protection in Less than 1μs
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High Immunity of False Triggering Under Transients
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Warning Output to Indicate the Occurrence of Faults
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Enable Input
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Easy to Use
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Thermal Enhanced TDFN Package
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Pb-Free Plus Anneal Available (RoHS Compliant)
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| Related Documentation |
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 Datasheet(s): |
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 Technical Brief(s): |
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 Evaluation Board(s): |
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 Technical Homepage: |
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 Parametric Data |
| | Programmable Overcurrent (A) | | 0 to 1.5 | | | Input Overvoltage Protection (V) | | 5.58 typ, 5.65 min, 6.0 max | | | Battery Overvoltage Protection (V) | | 4.34 typ, 4.28 min, 4.4 max | | | Battery Leakage | | 20nA max @ 4.34VVB | | | RON @ 500mA (mΩ) | | 250 typ, 450 max | |
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| Applications |
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- Cell Phones
- Digital Still Cameras
- PDAs and Smart Phones
- Portable Instruments
- Desktop Chargers
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| | ISL6251A | | Low Cost Multi-Chemistry Battery Charger Controller | | | ISL6256A | | Highly Integrated Battery Charger with Automatic Power Source Selector for Notebook Computers | | | ISL88731 | | SMBus Level 2 Battery Charger | | | ISL88731A | | SMBus Level 2 Battery Charger | | | ISL9200 | | Charging System Safety Circuit | | | ISL9209 | | Charging System Safety Circuit | | | ISL9209C | | Charging System Safety Circuit | | | ISL9211 | | Charging System Safety Circuit | | | ISL9211A | | Charging System Safety Circuit | | | ISL9212 | | Charging System Safety Circuit | | | ISL9212A | | Charging System Safety Circuit | | | ISL9212B | | Charging System Safety Circuit | |
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