Configurable AS3715 PMIC from ams Supports Platform Designs for li-ion Battery-Powered Devices
September 15 2014 - 2:59AM
Business Wire
AS3715’s features particularly well suited to action cameras
and portable navigation devices
ams AG (SIX: AMS), a leading provider of high performance analog
ICs and sensors, today introduced the AS3715, a configurable power
management IC (PMIC) which enables OEMs to implement power circuits
for multiple end products with the same hardware design.
The new AS3715 includes all the essential power management
building blocks required to provide a power solution for handheld
devices powered by lithium-ion batteries, such as action cameras,
navigation devices, tablets, media players and gaming consoles.
Highly versatile, it offers the capability to program the
start-up configuration, so that the operation of the power system
can easily be adapted for different application processors. The
programmability of the start-up sequence and of the built-in DC-DC
converters’ outputs allows design teams to accommodate changes in
end-product specifications at any time without re-spinning their
board design.
The power regulation blocks in the AS3715 include:
- three 4MHz DC-DC step-down (buck)
converters with programmable outputs
- one DC-DC step-down controller
- two DC-DC step-up (boost) converters
with programmable outputs
- eight LDOs
The device also offers eight GPIOs, a charger circuit supporting
a 1.5A output, an I2C interface, three current sinks, an ADC and a
watchdog timer.
The DC-DC controller controls external power stages, allowing
the user to maximize efficiency, simplify PCB routing and
distribute power and heat dissipation over a wide board area. It
supports configuration as either a single- or dual-phase
controller, which means that the system’s efficiency sweet spot can
be adapted to the requirements and size constraints of the design.
The DC-DC controller can manage an output current of up to 8A.
Two of the eight LDOs are low-noise devices well suited to RF
modules, image sensors and other noise-sensitive circuits.
The AS3715’s three high-voltage current sinks, which are
intended for LCD backlighting, provide a programmable current
output adjustable in 150μA increments in a range from 0A to 40mA.
In addition, PWM input options provide a simple means to implement
dynamic luminance scaling. The integrated 5V boost converter can
supply power to HDMI interfaces or other 5V peripherals.
Other configuration options include the ability to implement
either switched-mode or linear charging, depending on whether the
design must be optimized for power efficiency or for space and
cost.
Safety features include a customizable JEITA-compliant
temperature supervision and voltage/current control circuit.
‘Because the AS3715 is a very versatile PMIC, design engineers
can easily use it as the basis for a single power system platform
supporting a wide portfolio of products,’ said Peter Kammerlander,
product manager in the power and wireless business unit at ams.
‘The flexible configuration capability of the AS3715 PMIC also
allows developers to react quickly to late changes in the design
specification. Even changing or upgrading the processor will not
necessarily require a re-design of the power management
circuit.’
The AS3715, which is available for sampling now, is priced at
$3.68 for 1,000-unit quantities. It is housed in a space-saving
3.7mm x 3.7mm WL-CSP 91 package. It operates from a single 2.7-5.5V
supply, and is rated for operation over a temperature range from
-40°C to +85°C.
More information about the AS3715 may be found at
www.ams.com/Power-Management-Units/AS3715.
ams AGPatricia Moosburger, Media Relationsphone: +43 (0)
3136 500 31235press@ams.comwww.ams.com
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