General Description
The AS3715 is a compact System PMU supporting two Li-Ion
batteries and up to 14 power rails.
The device offers advanced power management functions. All
necessary ICs and peripherals in a battery powered mobile
device are supplied by the AS3715. It features 3 DCDC buck
converters, one DCDC buck controller, a 5V HDMI booster, a HV
backlight boost controller with 3 current sinks as well as 8 LDOs
(2 low noise). The different regulated supply voltages are
programmable via the serial control interface. 3-4MHz DCDC
operation with 0.47uH coils is reducing cost and PCB space.
AS3715 contains a linear or switch mode Li-Ion battery charger
with constant current and constant voltage operation. The
maximum charging current is 1.5A. An internal battery switch
and an optional external switch are separating the battery
during charging or whenever an external power supply is
present. In addition a second external battery path can be
controlled. With these switches it is also possible to operate
with no or deeply discharged batteries.
A dual USB input current limiter can be used to control the
current taken form the USB supplies or charger inputs.
Additional features are a 30V OV protection and JEITA compliant
battery temperature supervision with selectable NTC beta
values.
Applications
The device is suitable for digital still cameras, outdoor action
cameras, digital movie cameras, general Li-Ion battery powered
mobile devices.