ams Launches Ultra-Compact, Efficient 200mA Boost Converter for Products Powered by a Single-Cell Li-Ion Battery
October 14 2015 - 9:00AM
Business Wire
AS1383’s 3.5MHz fixed-frequency switching enables use of
small external components, making it ideal for use in
space-constrained products such as wristbands
ams AG (SIX: AMS), a leading provider of high performance
sensors and analog ICs, today introduced the AS1383, an
ultra-compact switching boost converter which offers high
efficiency and helps extend run-time in applications powered by a
single-cell lithium-ion battery.
The converter provides outputs of between 2.7V and 5.0V from a
2.7V-5.5V input voltage range. It is available with an adjustable
output voltage, or a factory-programmed fixed output voltage.
Depending on the input voltage, it can provide a maximum output
current of up to 200mA.
The AS1383, which implements peak current-mode PWM control for
accurate line and load regulation, features internal NMOS and PMOS
power switches with very low on-resistance and gate charge. This
helps the converter to achieve high efficiency, peaking at 92%,
across the range from moderate to full loads.
In addition, it offers a clever ‘Powersave’ mode in which all
circuitry except that required to monitor the output voltage is
turned off when the output current falls below the point
at which the energy supplied in the switch's minimum on-time
is greater than the energy consumed by the load. This
Powersave mode keeps power consumption down to a typical 25µA when
supplying light loads.
Operating at a high fixed switching frequency of 3.5MHz, the
AS1383 requires only a small input and output capacitor and an
inductor rated at just 1µH. Two additional components, external
resistors for setting the output voltage, are required only in the
adjustable-output version of the device.
The converter itself is a six-pin wafer-level chip-scale
package, with a footprint of just 1.2mm x 0.8mm and a pitch of
0.4mm. This means that an AS1383-based circuit is small enough to
fit in the latest sleek designs for consumer products such as
wristbands, media players, digital cameras and mobile phones.
The fixed switching frequency used by the AS1383, and integrated
anti-ringing control implemented in the device, help system
designers to realize low-noise end product designs. At 20mV
peak-to-peak for a 150mA load, output voltage ripple is also low
enough to avoid interfering with sensitive downstream signals.
‘With the introduction of the AS1383, ams has achieved a
remarkable combination of small solution size and high efficiency
across the load range from light loads up to the maximum 200mA
output current. OEMs can benefit from this to meet consumers’
demand for longer intervals between charges in the devices they use
heavily’, said Bernd Krafthoefer, marketing manager at ams.
The AS1383 is available in production volumes now. Unit pricing
is $0.25 in order quantities of 1,000 units.
A demonstration kit for the AS1383 is available from the ams
ICdirect online shop. For sample requests and for more technical
information, please go to www.ams.com/Boost-Converter/AS1383.
Download press picture and block diagram at
http://www.ams.com/eng/Press/Press-Releases/
View source
version on businesswire.com: http://www.businesswire.com/news/home/20151014005582/en/
amsPatricia MoosburgerMedia Relationsphone: +43 (0) 3136
500 31235press@ams.comwww.ams.com
American Shared Hospital... (AMEX:AMS)
Historical Stock Chart
From Aug 2024 to Sep 2024
American Shared Hospital... (AMEX:AMS)
Historical Stock Chart
From Sep 2023 to Sep 2024