BQ29209-Q1 Texas instruments

BQ29209-Q1

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BQ29209-Q1

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Описание

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.

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 I_CC < 3 µA typical (V_CELL(ALL) < V_PROTECT)
Internal cell balancing handles current up to 15 mA
External cell balancing mode supported
High-accuracy overvoltage protection:
- ±25 mV with T_A = 0°C to 60°C
Fixed overvoltage protection threshold: 4.30 V
Small 8L DRB package
Functional Safety-Capable
- Documentation available to aid functional safety system design
Automotive-qualified AEC Q100 grade two

Function	Protection
Number of series cells (min)	2
Number of series cells (max)	2
Features	Cell balancing, 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