BQ29200

更新时间： 2024-09-14 06:44:15

品牌	Logo	应用领域
德州仪器 - TI		电池
页数	文件大小	规格书
15页	576K
描述
Voltage Protection with Automatic Cell Balance for 2-Series Cell Li-Ion Batteries

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BQ29200 数据手册

bq29200

bq29209

www.ti.com

SLUSA52 –JUNE 2010

Voltage Protection with Automatic Cell Balance for 2-Series Cell Li-Ion Batteries

Check for Samples: bq29200 , bq29209

FEATURES

•

High-Accuracy Overvoltage Protection:

– ±25 mV with T_A= 0°C to 60°C

•

2-Series Cell Secondary Protection

•

Automatic Cell Imbalance Correction with

External Enable Control

Fixed Overvoltage Protection Thresholds:

4.30 V, 4.35 V

–

±30 mV Enable, 0 mV Disable

Thresholds Typical

Small 8L DRB Package

•

External Capacitor-Controlled Delay Timer

APPLICATIONS

•

2^ndLevel Protection in Li-Ion Battery Packs

External Resistor-Controlled Cell Balance

Current

–

Netbook Computers

Power Tools

Portable Equipment and Instrumentation

Battery Backup Systems

•

Low Power Consumption I_CC< 3 µA Typical

(V_CELL(ALL) < V_PROTECT

)

DESCRIPTION

The bq2920x device is a secondary overvoltage protection IC for two-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 two-series cell battery pack is compared to an internal reference voltage. If either

cell reaches an overvoltage condition, the bq2920x device starts a timer that provides a delay proportional to the

capacitance on the CD pin. Upon expiration of the internal timer, the OUT pin changes from low to high state.

If enabled, the bq2920x will perform automatic cell imbalance correction where the two cells are automatically

corrected for voltage imbalance by loading the cell with the higher charge voltage with a small balancing current.

When the cells are measured to be equal within nominally 0 mV, the load current is removed. It will be re-applied

if the imbalance exceeds nominally 30 mV. The cell mismatch correction circuitry is enabled by pulling the

CB_EN pin low, and disabled when CB_EN is pulled to VDD or greater than 2.2 V.

VC2

VC1

OUT

VDD

VC1_CB

CB_EN

GND

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...15

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与BQ29200相关器件

型号	品牌	获取价格	描述	数据表
BQ29200DRBR	TI	获取价格	Voltage Protection with Automatic Cell Balance for 2-Series Cell Li-Ion Batteries
BQ29200DRBT	TI	获取价格	Voltage Protection with Automatic Cell Balance for 2-Series Cell Li-Ion Batteries
BQ29209	TI	获取价格	具有自动电量平衡功能的电压保护，用于 2 节锂离子电池，OVP=4.30V
BQ29209DRBR	TI	获取价格	Voltage Protection with Automatic Cell Balance for 2-Series Cell Li-Ion Batteries
BQ29209DRBT	TI	获取价格	Voltage Protection with Automatic Cell Balance for 2-Series Cell Li-Ion Batteries
BQ29209-Q1	TI	获取价格	具有自动电池均衡功能的汽车电压保护，用于 2 节锂离子电池，OVP=4.30V
BQ29209TDRBRQ1	TI	获取价格	具有自动电池均衡功能的汽车电压保护，用于 2 节锂离子电池，OVP=4.30V \| DRB
BQ29209TDRBTQ1	TI	获取价格	具有自动电池均衡功能的汽车电压保护，用于 2 节锂离子电池，OVP=4.30V \| DRB
BQ29311	TI	获取价格	THREE AND FOUR CELL LITHIUM ION OR LITHIUM POLYMER BATTERY PROTECTION IC
BQ29311_15	TI	获取价格	FOUR-CELL LITHIUM-ION

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