The bq769x0 family of robust analog front-end (AFE) devices serves as part of a complete pack monitoring and protection solution for next-generation, high-power systems, such as light electric vehicles, power tools, and uninterruptible power supplies. The bq769x0 is designed with low power in mind: Sub-blocks within the IC may be enabled or disabled to control the overall chip current consumption, and a SHIP mode provides a simple way to put the pack into an ultra-low power state.
The bq76920 device supports up to 5-series cells or typical 18-V packs, the bq76930 handles up to 10-series cells or typical 36-V packs, and the bq76940 works for up to 15-series cells or typical 48-V packs. A variety of battery chemistries may be managed with these AFEs, including Lithium Ion, Lithium iron phosphate, and more. Through I2C, a host controller can use the bq769x0 to implement many battery pack management functions, such as monitoring (cell voltages, pack current, pack temperatures), protection (controlling charge/discharge FETs), and balancing. Integrated A/D converters enable a purely digital readout of critical system parameters, with calibration handled in TI’s manufacturing process.
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Part number | Order | Vin (Max) (V) | Number of series cells (Min) | Number of series cells (Max) | Features | Operating temperature range (C) | Rating | Package Group | Package size: mm2:W x L (PKG) |
---|---|---|---|---|---|---|---|---|---|
BQ76930 |
|
50 | 6 | 10 |
Low side driver
Over-current in discharging protection Short current detection |
-40 to 85 | Catalog | TSSOP | 30 | 30TSSOP: 50 mm2: 6.4 x 7.8 (TSSOP | 30) |
BQ76940 |
|
75 | 9 | 15 |
Low side driver
Over-current in discharging protection Short current detection |
-40 to 85 | Catalog | TSSOP | 44 | 44TSSOP: 71 mm2: 6.4 x 11.15 (TSSOP | 44) |