ISL94212 Datasheet, PDF (1/2 Pages) Intersil Corporation – Multi-Cell Li-Ion Battery Manager

Multi-Cell Li-Ion Battery Manager
ISL94212
The ISL94212 is a Multi-cell Li-ion battery manager IC that
supervises up to 12 series connected cells. The part performs
accurate monitoring, cell balancing and extensive system
diagnostics functions. Three cell balancing modes are
provided: manual mode, timed mode and an auto-balance
mode which terminates balancing functions when a (host
microcontroller specified) charge transfer value has been met.
The ISL94212 communicates to a host microcontroller via an
SPI interface and to other ISL94212s using a robust,
proprietary, two-wire Daisy Chain system.
The ISL94212 is offered in a 64 Ld TQFP package and is
specified over an industrial temperature range of -40°C to
+85°C.
Applications
• Hybrid, electric vehicle battery packs
• Battery backup systems
• E-Moto; E-Bike
Features
• Up to 12-cell voltage monitors, support Li-Ion CoO₂, Li-Ion
Mn₂O₄, and Li-Ion FePO4 chemistries
• Cell voltage measurement accuracy ±10mV
• Cell voltage scan rate of 19.5µs per cell (234µs to scan
12 cells)
• Up to four external temperature inputs
• Robust Daisy Chain communications system
• 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 = V_SS
• 2Mbps SPI
Related Literature
• Evaluation board application note: ISL94212EVZ
ISL94212
DHi2
DLo2
TO OTHER DEVICES (OPTIONAL)
ISL94212
DHi2
DLo2
DHi1
DLo1
SCLK
DOUT
DIN
CS
DATA READY
FAULT
EN
HOST
MICRO
MONITOR BOARD (Master or Stand-alone)
MONITOR BOARD (Daisy Chain - Optional)
FIGURE 1. TYPICAL APPLICATION
December 14, 2012
1
FN7938.0
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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