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bq29209-Q1 - Voltage Protection

General Description

The BQ29209-Q1 device is a secondary overvoltage protection IC for 2-series cell lithium-ion battery packs that incorporates a high-accuracy precision overvoltage detection circuit and automatic cell imbalance correction.

Key Features

  • 1 2-series cell secondary protection.
  • Automatic cell imbalance correction with external enable control.
  • ±30-mV enable, 0-mV disable thresholds typical.
  • External capacitor-controlled delay timer.
  • External resistor-controlled cell balance current.
  • Low power consumption ICC < 3 µA typical (VCELL(ALL) <.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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Product Folder Order Now Technical Documents Tools & Software Support & Community BQ29209-Q1 SLUSC62C – JUNE 2015 – REVISED MAY 2019 BQ29209-Q1 Voltage Protection with Automatic Cell Balance for 2-Series Cell Li-Ion Batteries 1 Features •1 2-series cell secondary protection • Automatic cell imbalance correction with external enable control – ±30-mV enable, 0-mV disable thresholds typical • External capacitor-controlled delay timer • External resistor-controlled cell balance current • Low power consumption ICC < 3 µA typical (VCELL(ALL) < VPROTECT) • Internal cell balancing handles current up to 15 mA • External cell balancing mode supported • High-accuracy overvoltage protection: – ±25 mV with TA = 0°C to 60°C • Fixed overvoltage protection threshold: 4.