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BQ7693003DBT Datasheet(PDF) 19 Page - Texas Instruments |
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BQ7693003DBT Datasheet(HTML) 19 Page - Texas Instruments |
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19 / 63 page  BAT CHG VSS Cell Balance Drivers/FETs EEPROM Internal 3.3-V LDO DSG SRN SRP SDA SCL TS REG SRC REG OUT External 2.5/3.3-V LDO I2C Bandgap IBIAS VSTUP/POR 14-bit ADC Modulator OCD comp Digital core BOOT CAP To POR BOOT 256 kHz ALERT FET DRIVER and LOAD DETECT CC VREF 16-bit ACC Modulator TS Die temp SCD comp bq76920, bq76930, bq76940 www.ti.com SLUSBK2F – OCTOBER 2013 – REVISED NOVEMBER 2015 7 Detailed Description 7.1 Overview In the bq769x0 family of analog front-end (AFE) devices, the bq76920 device supports up to 5-series cells, the bq76930 device supports up to 10-series cells, and the bq76940 device supports up to 15-series cells. Via I2C, a host controller can use the bq769x0 to implement 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 including cell voltages and internal or external temperature, with calibration handled in TI’s manufacturing process. For an additional degree of pack reliability, the bq769x0 includes hardware protections for voltage (OV, UV) and current (OCD, SCD). The bq769x0 provides two low-side FET drivers, charge (CHG) and discharge (DSG), which may be used to directly manipulate low-side power NCH FETs, or as signals that control an external circuit that enables high-side PCH or NCH FETs. A dedicated ALERT input/output pin serves as an interrupt signal to the host microcontroller, quickly informing the microcontroller of an updated status in the AFE. This may include a fault event or that a coulomb counter sample is available for reading. An available ALERT pin may also be driven externally by a secondary protector to provide a redundant means of disabling the CHG and DSG signals and higher system visibility. 7.2 Functional Block Diagram Figure 7-1. Functional Block Diagram Copyright © 2013–2015, Texas Instruments Incorporated Detailed Description 19 Submit Documentation Feedback Product Folder Links: bq76920 bq76930 bq76940 |
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