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Battery management IC touts highest accuracy

Posted: 24 May 2011 ?? ?Print Version ?Bookmark and Share

Keywords:battery management? lithium-ion? battery packs?

Texas Instruments Inc. introduces a battery management IC 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 incorporate 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 1mV accuracy, which is needed for demanding new lithium chemistries.

The bq76PL536 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 of the bq76PL536 include 1mV typical voltage measurement accuracy which increases battery gas gauging accuracy to determine remaining capacity, cell-balancing efficiency and system safety. It can be vertically stackable to monitor up to 192 cells without additional isolation components between ICs. High-speed 1Mbps serial peripheral interface (SPI) bus operates between each bq76PL536 to provide reliable communication.

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.





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