Alpha and Omega Semiconductor Introduces a New AlphaZBL™ AC-DC Active Bridge Rectifier Solution
03 March 2023 - 12:00AM
Business Wire
AOZ7203AV Enables Improved Efficiency and
Reduces Standby Power Consumption in High Power AC-DC Adaptors and
Power Supplies
Alpha and Omega Semiconductor Limited (AOS) (Nasdaq: AOSL), a
designer, developer, and global supplier of a broad range of power
semiconductors, power ICs, and digital power products, today
introduced an extension to its active bridge driver, AlphaZBL™
family. Available in an SOP-8L package, the AOZ7203AV is a
self-powered dual driver IC for driving external high-voltage
MOSFETs to replace two low-side diodes of bridge rectifier. The new
device is suitable for use in adapters for high-end laptops and
televisions, as well as power supplies for Desktops, Game consoles,
and Servers.
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AOZ7203AV Enables Improved Efficiency and
Reduces Standby Power Consumption in High Power AC-DC Adaptors and
Power Supplies (Graphic: Business Wire)
The new AOZ7203AV features a high withstand voltage, a
self-powered Vcc supply from the AC line, ultra-low operation
current, and X-capacitor discharge (CB safety certified). A
break-before-make circuit avoids the overlap of two gate driving
while driving the low-side high voltage MOSFETs in an active bridge
rectifier circuit. With an input voltage of up to 600V, the
AOZ7203AV has a wide operating (-40°C to +125°C) ambient
temperature range and driving low RDSON HV MOSFETs to gain more
efficiency improvement of AC power supply. These features make the
AOZ7203AV an optimal solution for efficient replacement of lossy
diodes in the bridge rectifier circuit of an AC-DC power
supply.
“Today’s power-hungry gaming laptops, game consoles, and
high-performance desktops demand high efficiency from the AC-DC
power supply. Using the AOZ7203AV with AOS’ low-ohmic high-voltage
external MOSFETs significantly improves the efficiency of the power
converter as the typical rectifier-diode forward-conduction losses
are reduced by 50 %. Efficiency can improve up to about 0.7 % at 90
V mains voltage,” said Armin Hsu, Power IC Senior Marketing Manager
at AOS.
Technical Highlights
- The AOZ7203AV combined with two High Voltage MOSFETs replaces
two low-side diodes in a bridge rectifier
- Increases efficiency and reduces power consumption
- Self-powered from AC mains
- Integrated X-capacitor discharge
- Low IC power consumption
- Two drivers in one package enable a more compact design
- Break-before-make circuit avoids overlapping gate drive signal
to HV MOSFETs
- Very low external part counts
- Undervoltage lockout
- Drain-source overvoltage protection for all external power
MOSFETs
- Gate pull-down currents at startup for all external power
MOSFETs
Pricing and Availability
The AOZ7203AV is immediately available in production quantities
with a lead time of 14 weeks. The unit price in 1,000-piece
quantities is $1.68 USD. AOS products are offered in packages with
Pb-free plating and are RoHS compliant.
About AOS
Alpha and Omega Semiconductor Limited, or AOS, is a designer,
developer, and global supplier of a broad range of power
semiconductors, including a wide portfolio of Power MOSFET, IGBT,
IPM, TVS, Gate Drivers, SiC, Power IC,
and Digital Power products. AOS has developed extensive
intellectual property and technical knowledge that encompasses the
latest advancements in the power semiconductor industry, which
enables us to introduce innovative products to address the
increasingly complex power requirements of advanced electronics.
AOS differentiates itself by integrating its Discrete and IC
semiconductor process technology, product design, and advanced
packaging know-how to develop high-performance power management
solutions. AOS’s portfolio of products targets high-volume
applications, including portable computers, flat-panel TVs, LED
lighting, smartphones, battery packs, consumer and industrial motor
controls, automotive electronics, and power supplies for TVs,
computers, servers, and telecommunications equipment. For more
information, please visit www.aosmd.com.
Forward-Looking Statements
This press release contains forward-looking statements based on
current expectations, estimates, forecasts, and projections of
future performance based on management’s judgment, beliefs, current
trends, and anticipated product performance. These forward-looking
statements include, without limitation, references to the
efficiency and capability of new products and the potential to
expand into new markets. Forward-looking statements involve risks
and uncertainties that may cause actual results to differ
materially from those contained in the forward-looking statements.
These factors include but are not limited to, the actual product
performance in volume production, the quality and reliability of
the product, our ability to achieve design wins, the general
business and economic conditions, the state of the semiconductor
industry, and other risks as described in the Company's annual
report and other filings with the U.S. Securities and Exchange
Commission. Although the Company believes that the expectations
reflected in the forward-looking statements are reasonable, it
cannot guarantee future results, level of activity, performance, or
achievements. You should not place undue reliance on these
forward-looking statements. All information provided in this press
release is as of today’s date unless otherwise stated, and AOS
undertakes no duty to update such information except as required
under applicable law.
View source
version on businesswire.com: https://www.businesswire.com/news/home/20230302005209/en/
Mina Galvan Tel: 408.789.3233 Email: mina.galvan@aosmd.com
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