The bq2407x series of devices are integrated Li-ion linear chargers and system power path management devices targeted at space-limited portable applicati***. The devices operate from either a USB port or AC adapter and support charge currents up to 1.5A. The input voltage range with input overvoltage protection supports unregulated adapters. The USB input current limit accuracy and start up sequence allow the bq2407x to meet USB-IF inrush current specification. Additionally, the input dynamic power management (VIN-DPM) prevents the charger from crashing incorrectly configured USB sources.
The bq2407x features dynamic power path management (DPPM) that powers the system while simultaneously and independently charging the battery.
特性
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Fully Compliant USB Charger
- Selectable 100mA and 500mA Maximum Input Current
- 100mA Maximum Current Limit Ensures Compliance to USB-IF Standard
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Input based Dynamic Power Management (VIN-DPM) for
Protection Against Poor USB Sources
- 28V Input Rating with Overvoltage Protection
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Integrated Dynamic Power Path Management (DPPM) Function Simultaneously
and Independently Powers the System and Charges the Battery - Supports up to 1.5A Charge Current with Current Monitoring Output (ISET)
- Programmable Input Current Limit up to 1.5A for Wall Adapters
- System Output Tracks Battery Voltage (bq24072)
- Programmable Termination Current (bq24074)
- Battery Disconnect Function with SYSOFF Input (bq24075, bq24079)
- Programmable Pre-Charge and Fast-Charge Safety Timers
- Reverse Current, Short-Circuit and Thermal Protection
- NTC Thermistor Input
- Proprietary Start Up Sequence Limits Inrush Current
- Status Indication – Charging/Done, Power Good
- ***all 3 mm × 3 mm 16 Lead QFN Package
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APPLICATI***
- ***art Phones
- Portable Media Players