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BQ24204DGNRG4 Datasheet(PDF) 1 Page - Texas Instruments |
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BQ24204DGNRG4 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 20 page 1 FEATURES DESCRIPTION TYPICAL APPLICATION bq24200, bq24201 bq24202, bq24203 bq24204, bq24205 SLUS501C – OCTOBER 2001 – REVISED MARCH 2008 www.ti.com SINGLE-CHIP LI-ION AND LI-POL CHARGE MANAGEMENT IC FOR CURRENT-LIMITED APPLICATIONS • Designed Specifically to Work With Current-Limited Wall Supplies The bq2420x series are simple Li-Ion linear charge management devices targeted at low-cost and space • Ideal for Low Dropout Charger Design for limited charger applications. The bq2420x series offer Single-Cell Li-Ion Packs With Coke or Graphite integrated powerFET, high-accuracy voltage Anodes regulation, temperature monitoring, charge status, • Integrated PowerFET for 500 mA and charge termination, in a single monolithic device. • Integrated Voltage Regulation With 0.5% The bq2420x is designed to work with a Accuracy current-limited wall-mount transformer and therefore • Battery Insertion and Removal Detection does not provide any current regulation. However, these devices offer a fixed internal current limit to • Charge Termination by Minimum Current and prevent damage to the internal powerFET. A Time time-limited pre-conditioning phase is provided to • Pre-Charge Conditioning With Safety Timer condition deeply discharged cells. Once the battery • Sleep Mode for Low-Power Consumption reaches the charge voltage, the high accuracy voltage regulation loop takes over and completes the • Charge Status Output for LED or Host charge cycle. Charge is terminated based on Processor Interface Indicates minimum current. An internal charge timer provides a • Charge-in-Progress, Charge Completion, and backup safety for charge termination. Fault Conditions Other standard features include an automatic sleep • Optional Temperature Monitoring Before and mode activated when VCC falls below the battery During Charge voltage and a recharge feature activated when the • Small, 8-Pin Power-Pad MSOP Package battery voltage falls below the VRCH threshold. In addition to the standard features, the core product provides two additional enhancements: temperature monitoring and status display. The temperature- sense circuit continuously measures battery temperature using an external thermistor and inhibits charge until the battery temperature is within the user-defined thresholds. The STAT pin indicates three conditions of operation of the charger. These conditions are charge-in-progress, charge complete, and fault. This output can be used to drive an LED or an interface to a microcontroller. 1 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. Copyright © 2001–2008, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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