TDK-Lambda Takes Digital Power Control to the Next Level
SAN DIEGO, CA (November 19, 2008) -
Taking digital power control to the next level, TDK-Lambda's new EFE Series of embedded front-end power supplies delivers industry leading power density,
high efficiency, and enhanced reliability. The first products in the range are the 300-watt EFE-300 and the 400-watt EFE-400 single output supplies that
deliver 133% peak power capability for 10 seconds and offer a class-leading efficiency of up to 90%.
The EFE Series employs an 8-bit microcontroller for full digital control of the output and to handle housekeeping routines This brings a 25% parts count
reduction to achieve a 45% smaller and up to 56% lighter design when compared to similar recently announced competitive products. Power densities of up
to 22W/in3 are achieved under peak load conditions and 16.6W/in3 under continuous loading.
Compact dimensions and a 1U profile (the EFE-300 is only 3" x 5" x 1.34" and the EFE-400 is only 3" x 6" x 1.34") allow the EFE Series to be incorporated
in designs where space is limited, so end products can be smaller, cooler and more feature rich. Typical applications include broadcast, instrumentation,
industrial, ATE, automation, routers, servers and security networks.
The new digitally controlled power supplies incorporate many innovative design features including an integrated magnetics transformer that increases the
overall efficiency. The digital control allows the power supply's performance, such as current limit and start-up characteristics, to be optimized. A low
cost primary side control topology is used, supervised by the microcontroller. This results in fewer parts and higher efficiency without sacrificing load
regulation performance. Furthermore, the need for an opto-isolator is eliminated – a device which is undesirable for long life power supply designs.
TDK-Lambda's Advanced Development Manager, Andrew Skinner commented: ‘'Many of the design features of the EFE Series directly enhance reliability. For
example, having precise control of abnormal situations through proprietary algorithms prevents device overstress. In addition, better circuit noise immunity
is achieved compared to analog designs, and the substantial parts count reduction allows for more optimized component spacing leading to improved thermal
The EFE-300 delivers 300W continuous power (400W peak for 10 seconds) with nominal outputs of 12V/25A or 24V/12.5A, and the EFE-400 delivers 400W continuous
power (530W peak for 10 seconds) with nominal outputs of 12V/33.3A or 24V/16.7A. All models can be precisely factory programmed to accommodate non-standard
system voltages. An additional 12V/0.25A fan supply output is also available and all models operate from a 90-264VAC input. Active power factor correction
ensures EN61000-3-2 compliance. Other EMC improving design features, such as the use of SiC diodes, ensure Curve B EMC performance with a significant
As well as the impressive technical performance, the EFE Series meets TDK-Lambda's design guidelines for environmentally responsible products by consuming
less energy to manufacture and to operate, having fewer parts, weighing less, and having a long life expectancy. The EFE Series is available in a variety
of case options, either open frame or enclosed. The use of low profile output connectors allows maximum airflow for optimized cooling efficiency.
All products in TDK-Lambda's EFE Series are approved to IEC/EN/UL/CSA 60950-1 for general purpose applications and IEC/EN 61010-1 for laboratory and process
control applications. In addition, the units carry the CE mark according to the LV Directive, are RoHS compliant, and come with a three-year warranty.
The EFE series are available now with prices starting at $150.00 each in 500 piece quantities.
For more information, please call TDK-Lambda Americas directly at 619-575-4400 or visit the website at: www.us.tdk-lambda.com/lp
TDK-Lambda is a subsidiary of the TDK Corporation (NYSE: TDK), a leading global electronics company (www.tdk.com). TDK-Lambda has been a major
provider of power solutions for over 60 years. The company designs and manufactures a wide range of AC-DC and DC-DC power products for Industrial,
Medical, Telecom, Datacom, and Test & Measurement applications worldwide. For more information, please call TDK-Lambda directly on 619-575-4400 or
visit the website at: www.us.tdk-lambda.com/lp
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