Produktdetails

Function Protection Number of series cells (min) 2 Number of series cells (max) 2 Features Cell balancing, External delay capacitor, Overvoltage, Single pin output drive Operating current (typ) (µA) 3 Rating Automotive 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
Function Protection Number of series cells (min) 2 Number of series cells (max) 2 Features Cell balancing, External delay capacitor, Overvoltage, Single pin output drive Operating current (typ) (µA) 3 Rating Automotive 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 x 3
  • 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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Technische Dokumentation

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Typ Titel Datum
* Data sheet BQ29209-Q1 Voltage Protection with Automatic Cell Balance for 2-Series Cell Li-I datasheet (Rev. D) 30 Sep 2020
White paper Understanding Functional Safety FIT Base Failure Rate Estimates per IEC 62380 and SN 29500 (Rev. A) PDF | HTML 30 Apr 2024
Functional safety information BQ29209-Q1 Functional Safety FIT Rate, FMD, and Pin FMA 02 Aug 2020

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