BQ29330 Status: ACTIVE

Product Information

Features

• 2- 3- or 4-Cell Series 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-m 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
• APPLICATIONS
  • Notebook Computers
  • Medical and Test Equipment
  • Instrumentation and Measurement Systems

Description

The bq29330 is a 2-, 3-, or 4-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 ).