Features
- Up to 12-cell voltage monitors, support Li-Ion CoO2, Li-ion Mn2O4, and Li-ion FePO4 chemistries
- Cell voltage measurement accuracy ±10mV
- 13-bit cell voltage measurement
- Pack voltage measurement accuracy ±180mV
- 14-bit pack voltage and temperature measurements
- Cell voltage scan rate of 19.5µs per cell (234µs to scan 12 cells)
- Internal temperature monitoring
- Up to four external temperature inputs
- Robust daisy chain communications system
- Daisy chain up to 14 devices to monitor up to 168 cells
- Integrated system diagnostics for all key internal functions
- Hardwired and communications based fault notification
- Integrated watchdog shuts down device if communication is lost
- 7µA shutdown current: Enable = VSS
- 2Mbps SPI
Description
The ISL94212A Li-ion battery manager IC supervises up to 12 series-connected cells. The part provides accurate monitoring, cell balancing, and extensive system diagnostics functions. Three cell balancing modes are provided: manual balancing mode, timed balancing mode, and auto balance mode. The auto balance mode terminates balancing functions when a charge transfer value has been met. The ISL94212A communicates with a host microcontroller via a serial peripheral interface (SPI) and with other ISL94212A devices using a robust, proprietary two-wire Daisy Chain system. The ISL94212A is offered in a 64 Ld TQFP package and is specified for an operational temperature range of -40°C to +85°C.
Parameters
| Attributes | Value |
|---|---|
| Cells Supported (#) | 6 - 12 |
| Pack Voltage (Op) | 6 - 60 |
| Cell Balancing FETs | Both, External (Built-in Drivers) |
| Integrated Current Sense/Detection | None |
| Charge/Discharge FET Control | No |
| Charge/Discharge FET Arrangement | N/A |
| Charge/Discharge FET Location | N/A |
| IS (mA) | 3.31 |
| Sleep/Reset Mode Current (µA) | 12, 14 |
| Stand Alone Capable | No |
| Internal ADC (bits) | 14 |
| Daisy Chain | Yes |
| GPI+GPIOs (#) | 4 |
| Qualification Level | Standard |
| Temp. Range (°C) | -40 to +85°C |
Package Options
| Pkg. Type | Pkg. Dimensions (mm) | Lead Count (#) | Pitch (mm) |
|---|---|---|---|
| TQFP | 10.0 x 10.0 x 1.00 | 64 | 0.5 |
Applications
- Hybrid Electric Vehicle Battery Packs
- Battery Backup Systems
- E-Moto
- E-Bike
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Model-Based Development PlatformOffers electrochemical battery models designed to run on Renesas battery management solution platforms, enabling more accurate state estimation and improved overall battery performance.Provided By: BattGenie
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- Model-Based Development PlatformOffers electrochemical battery models designed to run on Renesas battery management solution platforms, enabling more accurate state estimation and improved overall battery performance.Provided By: BattGenie
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