TDK Lambda Americas Inc
TDK World Wide


June 7, 2004 Editor Contacts:
Stan Michelson, Focus Communications

New Lambda NV-350 Configurable Power Supply Provides Class-Leading Power Density

SAN DIEGO, CA (June 7, 2004) - Lambda today announced the NV-350, a 350-watt configurable AC-DC power supply that combines class-leading power density, high efficiency, low noise and excellent EMC performance in a very compact design. At 6.6 watts per cubic inch, the NV-350 offers designers unsurpassed performance for space-critical applications in instrumentation, broadcast, medical and high-end IT systems.


A member of the new NV-Power series, the NV-350 employs Lambda's patented multiple resonant topology (MRT), which uniquely uses synchronous rectification to achieve efficiencies of up to 90%. By reducing power losses significantly, Lambda has not compromised size for power. The 350-watt power supply comes in a very compact 1.6- x 3.75- x 10.9-inch package – compatible with 1U enclosures as well as 2U and 3U card frames – and, at just over 28 ounces, weighs 20% less than competitive supplies.

The NV-350 is fully configurable and can provide between one and six outputs, with voltages ranging from 3.3 to 32 volts and currents up to 40 amps; as many as three single- or dual-output modules can be selected. The transformers use a multiple-layer printed circuit board for the primary and a flexible circuit as secondary, a design that yields a high throughput of power and allows Lambda to use rapid configuring techniques in manufacturing the supply.

The NV-350 has no minimum load requirements and is available with a high-power standby output rated at 5 volts, 2 amps or 12 volts, 1 amp. Module good and inhibit signals come standard; AC good, global good and remote on/off are optional.

Lower heat dissipation, with the power components more evenly distributed around the design, means the NV-350 has no need for heatsinks, and its open construction allows easy cooling. Moreover, a low airflow requirement enables the power supply to use a smaller, quieter fan; system air-cooled versions are also available.

Because of its patented soft-switch MRT design, the NV-350 has inherently low emissions, aided by the use of silicon carbide Schottky diodes. Unique for this class of product, it has EN60601 medical approval combined with EN55022 Level B conducted emissions; it also has EN61010 and EN60950 approvals.

In response to customer feedback expressing a desire for ease of use, Lambda has provided NV-350 customers with a choice of screw or IEC input connectors and output screw terminals carefully designed to avoid cable bunching.

The NV-350 will be available in June, priced at $400 per unit (with four output configurations) in medium volumes. More information is available at Lambda's Web site,

For more than 50 years, Lambda has been a leading provider of standard and custom power supply solutions. The company's broad range of products power industrial, telecommunications, data communications, medical, and test-and-measurement applications worldwide. Lambda's corporate headquarters is at 3055 Del Sol Blvd., San Diego, Calif., 92154; telephone 800-LAMBDA4 (toll free) or 619-575-4400; fax 619-429-1011.

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