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See Technical Specifications

BQ29200DRBT

Voltage Protection with Automatic Cell Balance For 2-Cell Li-Ion Batteries, OVP=4.35V

Manufacturer:

Texas Instruments, Inc
Mfr.Part #:

BQ29200DRBT
Datasheet:

BQ29200DRBT Datasheet (PDF)
Function:

Battery Protection
Battery Chemistry:

Lithium Ion
Number of Cells:

2
Fault Protection:

Over Voltage
EDA/CAD Models:

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BQ29200DRBT 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

Category	Integrated Circuits (ICs)Power Management (PMIC)Battery Management	Series	-
Function	Battery Protection	Battery Chemistry	Lithium Ion
Number of Cells	2	Fault Protection	Over Voltage
Interface	-	Operating Temperature	-40°C ~ 110°C (TA)
Mounting Type	Surface Mount	Base Product Number	BQ29200