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Rating Automotive Number of series cells (max) 2 Number of series cells (min) 2 Features Cell balancing, External delay capacitor, Overvoltage, Single pin output drive Function Protection Operating current (typ) (µA) 3 Vin (max) (V) 16 TI functional safety category Functional Safety-Capable Overvoltage protection 4.3 Operating temperature range (°C) -40 to 105 Battery overvoltage protection (min) (V) 4.3 Battery overvoltage protection (max) (V) 4.3
Rating Automotive Number of series cells (max) 2 Number of series cells (min) 2 Features Cell balancing, External delay capacitor, Overvoltage, Single pin output drive Function Protection Operating current (typ) (µA) 3 Vin (max) (V) 16 TI functional safety category Functional Safety-Capable Overvoltage protection 4.3 Operating temperature range (°C) -40 to 105 Battery overvoltage protection (min) (V) 4.3 Battery overvoltage protection (max) (V) 4.3
VSON (DRB) 8 9 mm² (3 mm × 3 mm)
  • 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: 4.30 V
  • Small 8L DRB package
  • Functional Safety-Capable
  • Automotive-qualified AEC Q100 grade two
  • 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: 4.30 V
  • Small 8L DRB package
  • Functional Safety-Capable
  • Automotive-qualified AEC Q100 grade two

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.

The voltage of each cell in a 2-series cell battery pack is compared to a factory programmed internal reference voltage. If either cell reaches an overvoltage condition, the OUT pin changes from low to high state.

The BQ29209-Q1 can perform automatic voltage-based cell imbalance correction. Balancing can start when the cell voltages are different by nominally 30 mV or more and stops when the difference is nominally 0 mV. Cell balancing is enabled and disabled by the CB_EN pin.

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.

The voltage of each cell in a 2-series cell battery pack is compared to a factory programmed internal reference voltage. If either cell reaches an overvoltage condition, the OUT pin changes from low to high state.

The BQ29209-Q1 can perform automatic voltage-based cell imbalance correction. Balancing can start when the cell voltages are different by nominally 30 mV or more and stops when the difference is nominally 0 mV. Cell balancing is enabled and disabled by the CB_EN pin.

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기술 자료

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* 데이터 시트 BQ29209-Q1 Voltage Protection with Automatic Cell Balance for 2-Series Cell Li-I datasheet (Rev. D) PDF | HTML 2020. 9. 30
기능 안전 정보 BQ29209-Q1 Functional Safety FIT Rate, FMD, and Pin FMA PDF | HTML 2020. 8. 2

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