Two, Three and Four Cell Lithium or Lithium-Polymer Battery Protection AFE - BQ29330

BQ29330 (ACTIVE)

Two, Three and Four Cell Lithium or Lithium-Polymer Battery Protection AFE

Description

The bq29330 is a 2-series, 3-series, and 4-series cell lithium-ion battery pack full-protection analog front end (AFE) IC that incorporates a 2.5-V, 16-mA and 3.3-V, 25-mA low dropout regulator (LDO). The bq29330 also integrates an I2C-compatible interface to extract battery parameters such as battery voltage, individual cell voltages, and control output status. Other parameters such as current protection thresholds and delays can also be programmed into the bq29330 to increase the flexibility of the battery management system.

The bq29330 provides safety protection for overload, short circuit in charge, and short circuit in discharge conditions and can also provide cell overvoltage, battery overvoltage and battery undervoltage protection with the battery management host. In overload, short circuit in charge and short circuit in discharge conditions, the bq29330 turns off the FET drive autonomously, depending on the internal configuration setting. The communications interface allows the host to observe and control the status of the bq29330, enable cell balancing, enter different power modes, set current protection levels, and set the blanking delay times.

Cell balancing of each cell can be performed via a cell bypass path integrated into the bq29330, which can be enabled via the internal control register accessible via the I2C-compatible interface. The maximum bypass current is set via an external series resistor and internal FET on resistance (typ. 400 Ω).

Features

  • 2-Series, 3-Series, or 4-Series Cell Protection Control
  • Can Directly Interface with the bq803x-Based Gas Gauge Family
  • Watchdog and POR for the Host
  • Provides Individual Cell Voltages and Battery Voltage to
    Battery Management Host
  • Capable of Operation With 5-mΩ Sense Resistor Integrated
    Cell Balancing Drive
  • I2C Compatible User Interface Allows Access to
    Battery Information
  • Programmable Threshold and Delay for Overload Short Circuit
    in Discharge and Short Circuit in Charge
  • NMOS FET Drive for Charge and Discharge FETs
  • Host Control can Initiate Sleep and Ship Power Modes
  • Integrated 2.5-V, 16-mA LDO
  • Integrated 3.3-V, 25-mA LDO
  • Supply Voltage Range from 4.5 V to 28 V
  • Low Supply Current of 100 µA Typical

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Parametrics Compare all products in Battery Protection, Authentication & Identification Solutions

 
Function
Shutdown Current (uA)
# Series Cells
Delay Timer (Typ) (Sec)
Protection FETs
Implementation
Cell Chemistry
Special Features
Rating
Operating Temperature Range (C)
Pin/Package
Approx. Price (US$)
BQ29330
Protection    
1    
2-4 Cells    
Variable    
External    
Pack    
Li-Ion
Li-Polymer    
Over Voltage Protection    
Catalog    
-40 to 110    
30TSSOP    
0.80 | 1ku    
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