ISL94212_15 Datasheet, PDF (1/96 Pages) Intersil Corporation – Multi-Cell Li-Ion Battery Manager

DATASHEET
Multi-Cell Li-Ion Battery Manager
ISL94212
The ISL94212 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 ISL94212 communicates to a host microcontroller via an
SPI interface and to other ISL94212 devices using a robust,
proprietary, two-wire Daisy Chain system.
The ISL94212 is offered in a 64 Ld TQFP package and is
specified for an operational temperature range of -40°C to
+85°C.
Applications
• Light electric vehicle (LEV); E-Moto; E-Bike
• Battery backup systems; Energy Storage Systems (ESS)
• Solar Farms
• Portable and semi-portable equipment
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
• 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
VG1 VG1
ISL94212
DHi2
DLo2
TO OTHER DEVICES (OPTIONAL)
ISL94212
VG2 VG2
DHi2
DLo2
DHi1
DLo1
SCLK
DOUT
DIN
CS
DATA READY
FAULT
EN
HOST
MICRO
VG1
VG1
MONITOR BOARD (Master or Standalone)
VG2
MONITOR BOARD (Daisy Chain - Optional)
FIGURE 1. TYPICAL APPLICATION
April 23, 2015
1
FN7938.1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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