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| Multi-Cell Li-ion Battery Pack OCP/Analog Front-End |
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Available in RoHS/Pb-Free
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 Buy direct from Intersil
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 Check distributor inventory
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 Request samples
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Part No. |
Design-In
Status |
Temp. |
Package |
MSL |
Price
US $ |
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| ISL94200IRZ |
Active |
Ind |
24 Ld QFN |
3 |
3.05 |
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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 ISL94200 is an overcurrent protection device and analog front end for a microcontroller in a multi-cell Li-ion battery pack. The ISL94200 supports battery pack configurations consisting of 4-cells to 7-cells in series and 1 or more cells in parallel. The ISL94200 provides integral overcurrent protection circuitry, short circuit protection, an internal 3.3V voltage regulator, cell voltage monitor level shifters, and drive circuitry for external FET devices for control of pack charge and discharge.
Selectable overcurrent and short circuit thresholds reside in internal RAM registers. An external microcontroller sets the thresholds by setting register values through an I2C serial interface. Internal registers also contain the detection delays for overcurrent and short circuit conditions.
Using an internal analog multiplexer the ISL94200 provides monitoring of each cell voltage plus internal and external temperature by a separate microcontroller with an A/D converter. Software on this microcontroller implements all battery pack control functionality, except for overcurrent and short circuit shutdown. |
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 Key Features |
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Software Selectable Overcurrent Protection Levels and Variable Protect Detection Times
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4 Discharge Overcurrent Thresholds
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4 Short Crcuit Thresholds
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4 Charge Overcurrent Thresholds
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8 Overcurrent Delay Times (Charge)
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8 Overcurrent Delay Times (Discharge)
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2 Short Circuit Delay Times (Discharge)
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Automatic FET Turn-Off On Reaching External (Battery) or Internal (IC) Temperature Limit
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Fast Short Circuit Pack Shutdown
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Can Use Current Sense Resistor, FET rDS(ON), or Sense FET for Overcurrent Detection
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Four Battery-Backed Software Controlled Flags
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Allows Three Different FET Controls:
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Back-to-Back N-Channel FETs for Charge and Discharge Control
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Single N-Channel Discharge FET
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Single N-Channel FET for Discharge With Separate Optional (Smaller) Back-to-Back N-Channel FETs for Charge
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Integrated Charge/Discharge FET Drive Circuitry With 130μA (Typ) Turn-On Current and 180mA (Typ) Discharge FET Turn-Off Current
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10% Accurate 3.3V Voltage Regulator (Minimum 25mA Out With External NPN Transistor Having Current Gain Of 70)
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Monitored Cell Voltage Output Stable in 100μs
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Simple I2C Host Interface
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Sleep Operation With Programmable Negative Edge or Positive Edge Wake-Up
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<10μA Sleep Mode
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Pb-Free (RoHS compliant)
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| Related Documentation |
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 Datasheet(s): |
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 Parametric Data |
| | # of Series Connected Li-Ion Cells | | 4 to 7 | | | Power FET Control | | Y | | | Overvoltage Shutdown | | N | | | Undervoltage Shutdown | | N | | | Overcurrent Shutdown | | Discharge + Charge | | | Short Circuit Shutdown | | Discharge | | | Programmable Threshold | | 4-Discharge OC, 4-Charge OC, 4-Short Circuit Circuit | | | Programmable Timeout | | 8-Discharge OC, 8-Charge OC, 2-Short Circuit | | | Cell Voltage Monitor | | Y | | | Pack Current Monitor | | N | | | Cell Balancing FETs | | Y | | | Voltage Regulator (V) | | 3.3 | | | Interface | | I2C | |
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 Application Block Diagrams |
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| Applications |
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- Power Tools
- Battery Backup Systems
- E-Bikes
- Portable Test Equipment
- Medical Systems
- Hybrid Vehicle
- Military Electronics
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| | ISL9208 | | Multi-Cell Li-ion Battery Pack OCP/Analog Front End | | | | ISL9216 | | 8 to 12 Cell Li-Ion Battery Overcurrent Protection and Analog Front End Chip Set | | | | ISL9217 | | 8 to 12 Cell Li-Ion Battery Overcurrent Protection and Analog Front End Chip Set | | | | ISL94201 | | Multi-Cell Li-ion Battery Pack Analog Front-End | |
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