BQ62809
- Architecture for bidirectional charge distribution in an active
cell balancing application
- Up to 9 cells in series per device
- Programmable balancing current up to 2.5A
- Wide Input Voltage range of 2-4.5V/cell
- Support for flexible balancing schemes to enable charge distribution for cell-to-cell, cell-to-pack, and pack-to-cell schemes
- Integrated current sharing controller
- Typical charge efficiency of 85% for adjacent cell transfer
- Integrated accurate current monitor per device and channel
- Integrated thermal regulation and shutdown mode
- Stackable Architecture to support up to 4 devices in series or up to 36 cells in series
- 1MHz daisy-chainable SPI with internal level shifting capabilities for flexible system configuration
- Integrated 3-level protection features for cell, device, and communication fault
detection
- Overvoltage
- Undervoltage
- Open-Wire
- Short Circuit
- Overcurrent
- Thermal Regulation
- Watchdog Support
- Dedicated FAULT pin for reporting across connected devices
The BQ62809 is a 9-channel current converter that enables charge redistribution for Active Cell Balancing (ACB) within a battery pack/module. The balancing current and cell input range support a wide array of battery chemistries and the control topology supports flexible configuration of charge redistribution over an industry standard stackable communication bus. Integrated protection features support fault detection at multiple levels to protect the battery cell, device channel, and digital communication bus.
Each BQ62809 can support up to 9 series battery cells and can connect in series to support configurations up to 36 series cells. The architecture supports multiple charge re-distribution schemes that allows energy to transfer between multiple cells simultaneously. Charge can be transferred between stacked BQ62809 devices and support for concurrent, independent, and simultaneous charge transfer between multiple groups of cells. Independent device and channel reporting allow for reporting of integrated current monitors as well as device status bits.
The device offers a low component count requiring one inductor and two bulk capacitors per channel. The topology allows for standard off-the-shelf components allowing for a dense layout.
Integrated fault protection features include overvoltage, undervoltage, openwire, shortcircuit, overcurrent, thermal regulation and thermal protection of both the battery cells and device channels. When a fault condition is reported, the device has a dedicated pin for FAULT reporting between stacked devices to enable a prompt shutdown of any active balancing conditions.
The BQ62809VDXR is available in a 36-pin 4.50mm × 6.00mm WQFN package
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技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | BQ62809 Short datasheet | PDF | HTML | 2026/11/5 |
設計與開發
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| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| WQFN-FCRLF (VDX) | 36 | Ultra Librarian |
訂購與品質
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