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See Technical Specifications

BQ29209DRBR +BOM

Battery Battery Protection IC Lithium Ion 8-SON (3x3)

Manufacturer:

TI
Mfr.Part #:

BQ29209DRBR
Datasheet:

BQ29209DRBR Datasheet (PDF)
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
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BQ29209DRBR General Description

The bq2920x 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 bq2920x 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.

Key Features

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 Thresholds:
4.30 V, 4.35 V
Small 8L DRB Package

Specifications

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	Catalog
Vin (max) (V)	10	Overvoltage protection	4.3
Operating temperature range (°C)	-40 to 85	Battery overvoltage protection (min) (V)	4.3
Battery overvoltage protection (max) (V)	4.3