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Texas Instruments BQ2945xy Overvoltage Protection Devices

Texas Instruments BQ2945xy Overvoltage Protection Devices are secondary-level voltage monitors and protectors for Li-ion battery pack systems. Each cell on the BQ2945xy is monitored independently for an overvoltage condition. Additionally, the configuration on the devices facilitates whether the output is triggered after a fixed delay if any of the two or three cells has an overvoltage condition. This output is initiated into a high state after an overvoltage condition meets the specified delay timer.

Features

2-series and 3-series cell overvoltage monitor for secondary protection
Fixed programmable delay timer
Fixed OVP threshold
- Available range from 3.85V to 4.6V
Fixed OVP delay option of 4s or 6.5s

±10mV High-accuracy overvoltage protection
Low power consumption I_CC ≈ 1µA (V_CELL(ALL) < V_PROTECT)
Low leakage current per cell input <100nA
Small package footprint of 6-pin SON

Applications

Second-level protection in Li-Ion battery packs in:
- Tablets
- Slates
- Power tools
- Notebook computers
- Portable equipment and instrumentation

Texas Instruments BQ2945xy Overvoltage Protection Devices

Features

Applications

Simplified Schematic

Block Diagram

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