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BQ24232RGTTG4 Datasheet(PDF) 1 Page - Texas Instruments |
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BQ24232RGTTG4 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 33 page 1 FEATURES APPLICATIONS TYPICAL APPLICATION CIRCUIT IN VSS BAT DC GND Adaptor bq24230 OUT EN2 TS TEMP PACK+ PACK- SYSTEM TD 13 8 15 1 2 3 5 10 11 1mF 4.7mF 1 k 2.94 k 1 k 4.32 k 4.7mF DESCRIPTION bq24230 bq24232 www.ti.com .......................................................................................................................................... SLUS821A – OCTOBER 2008 – REVISED DECEMBER 2008 USB-FRIENDLY LITHIUM-ION BATTERY CHARGER AND POWER-PATH MANAGEMENT IC 2 • Fully Compliant USB Charger • Proprietary Start-Up Sequence Limits Inrush Current – Selectable 100-mA and 500-mA Maximum Input Current • Status Indication – Charging/Done, Power Good – 100-mA Maximum Current Limit Ensures Compliance to USB-IF Standard • Small 3 mm × 3 mm 16-Lead QFN Package – Input-based Dynamic Power Management (VIN-DPM) for Protection Against Poor USB • Bluetooth™ Devices Sources • Low-Power Handheld Devices • 28-V Input Rating With Overvoltage Protection • Integrated Dynamic Power-Path Management (DPPM) Function Simultaneously and Independently Powers the System and Charges the Battery • Supports up to 500-mA Charge Current With Current Monitoring Output (ISET) • Programmable Input Current Limit up to 500 mA for Wall Adapters • Programmable Termination Current (bq24232) • Programmable Precharge and Fast-Charge Safety Timers • Reverse Current, Short-Circuit, and Thermal Protection • NTC Thermistor Input The bq2423x series of devices are highly integrated Li-ion linear chargers and system power-path management devices targeted at space-limited portable applications. The devices operate from either a USB port or ac adapter and support charge currents between 25 mA and 500 mA. The high-input-voltage range with input overvoltage protection supports low-cost, unregulated adapters. The USB input current limit accuracy and start-up sequence allow the bq2423x to meet USB-IF inrush current specification. Additionally, the input dynamic power management (VIN-DPM) prevents the charger from crashing poorly designed or incorrectly configured USB sources. The bq2423x features dynamic power-path management (DPPM) that powers the system while simultaneously and independently charging the battery. The DPPM circuit reduces the charge current when the input current limit causes the system output to fall to the DPPM threshold, thus supplying the system load at all times while monitoring the charge current separately. This feature reduces the number of charge and discharge cycles on the battery, allows for proper charge termination, and enables the system to run with a defective or absent battery pack. Additionally, this enables instant system turn-on even with a totally discharged battery. The power-path management architecture also permits the battery to supplement the system current requirements when the adapter cannot deliver the peak system currents, enabling the use of a smaller adapter. 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. 2 Bluetooth is a trademark of Bluetooth SIG, Inc.. PRODUCTION DATA information is current as of publication date. Copyright © 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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