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BQ24079RGTR
1.2A USB-Friendly Li-Ion Battery Charger and Power-Path Management IC with 4.1 VBAT
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bq24072, bq24073, bq24074, bq24075, bq24079SLUS810K –SEPTEMBER 2008–REVISED MARCH 2015
bq2407x 1.5-A USB-Friendly Li-Ion Battery Charger and Power-Path Management IC Features 2 Applications Fully Compliant USB Charger • Smart Phones Portable Media Players– Selectable 100-mA and 500-mA Maximum
Input Current • Portable Navigation Devices 100-mA Maximum Current Limit Ensures • Low-Power Handheld Devices
Complianceto USB-IF Standard
Description– Input-Based Dynamic Power Management
(VIN-DPM) for Protection Against Poor USB The bq2407x seriesof devices are integrated Li-Ion
linear chargers and system power path managementSources
devices targeted at space-limited portable• 28-V Input Rating with Overvoltage Protection applications. The devices operate from eithera USB• Integrated Dynamic Power Path Management portoran AC adapter and support charge currentsup(DPPM) Function Simultaneously and to 1.5 A. The input voltage range with inputIndependently Powers the System and Charges overvoltage protection supports unregulated
the Battery adapters. The USB input current limit accuracy and
startup sequence allow the bq2407xto meet USB-IF• Supportsupto 1.5-A Charge Current with Current inrush current specifications. Additionally, the inputMonitoring Output (ISET) dynamic power management (VIN-DPM) prevents the• Programmable Input Current Limitupto 1.5Afor charger from crashing incorrectly configured USBWall Adapters sources. System Output Tracks Battery Voltage (bq24072) The bq2407x features dynamic power path• Programmable Termination Current (bq24074) management (DPPM) that powers the system while Battery Disconnect Function with SYSOFF Input simultaneously and independently charging the
battery. The DPPM circuit reduces the charge current(bq24075, bq24079)
when the input current limit causes the system output• Programmable Pre-Charge and Fast-Charge to fallto the DPPM threshold; thus, supplying theSafety Timers system loadatall times while monitoring the charge• Reverse Current, Short-Circuit and Thermal current separately. This feature reduces the numberProtection of charge and discharge cycles on the battery, allows
for proper charge termination and enables the system• NTC Thermistor Input run witha defectiveor absent battery pack.• Proprietary Start-up Sequence Limits Inrush
Current
Device Information(1) Status Indication– Charging/Done, Power Good
Typical Application Circuit(1) Forall available packages, see the orderable addendumat
the endofthe datasheet.
