BQ7692003PWR BQ7693003DBTR BQ7694003DBTR Power Path Management IC Battery Management 3 to 5 series cell Li-Ion Batt
BQ7692003PWR BQ7693003DBTR BQ7694003DBTR Power Path Management IC Battery Management 3 to 5 series cell Li-Ion Batt
1 Features
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AFE monitoring features
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– Pure digital interface
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– Internal ADC measures cell voltage, die temperature, and external thermistor
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– A separate, internal ADC measures pack current (coulomb counter)
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– Directly supports up to three thermistors (103AT)
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Hardware protection features
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– Overcurrent in Discharge (OCD)
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– Short Circuit in Discharge (SCD)
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– Overvoltage (OV)
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– Undervoltage (UV)
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– Secondary protector fault detection
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Additional features
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– Integrated cell balancing FETs
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– Charge, discharge low-side NCH FET drivers
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– Alert interrupt to host microcontroller
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– 2.5-V or 3.3-V output voltage regulator
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– No EEPROM programming necessary
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– High supply voltage absolute maximum (up to 108 V)
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– Simple I2C compatible interface (CRC option)
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– Random cell connection tolerant
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2 Applications
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Light electric vehicles (LEV): eBikes, eScooters, pedelec, and pedal-assist bicycles
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Power tools and garden tools
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Battery backup units (BBUS), energy storage systems (ESS) and uninterruptible power supply (UPS) systems
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Wireless base station backup systems
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12-V, 18-V, 24-V, 36-V, and 48-V industrial battery packs
3 Description
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.
Device Information
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PART NUMBER |
PACKAGE |
BODY SIZE (NOM) |
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bq76920 |
TSSOP (20) |
6.50 mm × 4.40 mm |
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bq76930 |
TSSOP (30) |
7.80 mm × 4.40 mm |
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bq76940 |
TSSOP (44) |
11.00 mm × 4.40 mm |
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