The BQ2969 family is a high-accuracy, low-power overvoltage protector with a 3mA regulated output supply for Li-ion and LiFePO4 (LFP) battery pack applications.
Each cell in a 2-series to 4-series cell stack is individually monitored for an overvoltage condition. An internally fixed-delay timer is initiated upon detection of an overvoltage condition on any cell. Upon expiration of the delay timer, the output pin is triggered into an active state to indicate that an overvoltage condition has occurred.
The regulated output supply delivers up to 3mA output current to drive always-on circuits, such as a real-time clock (RTC) oscillator. The BQ2969 family has a self-disable function to turn off the regulated output if any cell voltage falls below a programmable undervoltage threshold, thereby preventing drain on the battery.
The BQ2969 family provides exceptionally low power operation, drawing only 1.23µA during normal operation (excluding regulator load current), and dropping to 0.25uA when in an undervoltage condition. Even when in the undervoltage state, the device can still detect an overvoltage condition on any other cell (which can occur in an imbalanced pack) and can assert the output pin.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | BQ2969 Overvoltage Protection for 2-Series, 3-Series, and 4-Series Cell Li-Ion Batteries with Regulated Output Supply datasheet | PDF | HTML | 02 Aug 2024 |
| EVM User's guide | BQ2969 Evaluation Module User's Guide | PDF | HTML | 24 Jun 2023 |
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The BQ2969EVM evaluation module (EVM) is a complete evaluation system for the BQ2969, a high accuracy, low-power overvoltage protector with an integrated LDO for 2-series to 4-series Li-Ion, and LiFePO4 battery packs. The EVM consists of a BQ2969 circuit module which is used for simple evaluation (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| WSON (DSG) | 8 | Ultra Librarian |
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