industry’s highest accuracy lithium-ion battery monitor for
electric mobility, power tools and UPS
Intelligent IC extends battery pack lifetime, energy delivery
and system safety
DALLAS (May 19, 2011) – Texas Instruments
Incorporated today introduced a battery management integrated
circuit that increases the life of rechargeable lithium-ion
battery packs and maximizes available energy for hybrid and
electric vehicles, power tools and uninterruptible power source
(UPS) applications. The stackable bq76PL536 battery monitor,
balancer and protector incorporates analog-to-digital converters
for independent cell voltage and temperature protection, cell
balancing and isolated chip-to-chip communication. The device
intelligently measures battery cell voltages to 1-mV accuracy,
which is needed for demanding new lithium chemistries. For
information or to order, visit www.ti.com/bq76pl536-pr.
For the AEC-Q100 automotive-qualified version, see www.ti.com/bq76pl536Q1-pr.
The bq76PL536 also provides full secondary protection for
over voltage, under voltage and over temperature conditions.
When safety thresholds are exceeded, the device sets the fault
and alert outputs independently of the normal communication
channel. No external components are needed to configure or
enable the protection features.
Key features and benefits
- ±1-mV typical voltage measurement accuracy increases
battery gas gauging accuracy to determine remaining capacity,
cell-balancing efficiency and system safety.
- Integrated secondary level of protection for over-voltage,
under-voltage and over-temperature conditions increases
safety without adding component cost
- Vertically stackable to monitor up to 192 cells without
additional isolation components between ICs.
- High-speed 1-Mb/s serial peripheral interface (SPI) bus
operates between each bq76PL536 to provide reliable communication.
- AEC-100 production flow, reliability and testing for
- Cell-balancing drivers extend the available capacity
and lifetime of the battery pack by maintaining state of
charge and capacity balance.
Tools and support
TI offers a variety of tools and support to speed the implementation
of the bq76pl536 family of devices:
bq76pl536EVM-3 evaluation module: www.ti.com/bq76pl536evm-pr.
bq76pl536EVM-3 evaluation software: www.ti.com/bq76pl536evm3software-pr.
bq76536PGM-1 programmable board: www.ti.com/bq76pl536board-pr.
bq76pl536-1 programmable software: www.ti.com/bq765pl536progsoft-pr.
Availability and pricing
The bq76PL536 and bq76PL536-Q1 battery monitors are available
now in a 64-pin HTQFP package; suggested resale pricing starts
at $4.30 in quantities of 1,000.