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Description
The bq2407x series of devices are 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 an AC adapter and support charge currents up
to 1.5 A. 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 specifications. 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. 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.
Applications
• Smart Phones
• Portable Media Players
• Portable Navigation Devices
• Low-Power Handheld Devices
Li-Ion
4.2 V
1.5 A
VQFN-16
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