TDK-Lambda
Americas
extended the power range of their digitally-controlled EFE-M series of medical/ITE
power supplies from 300 to now 400W. The EFE400M
series was designed with Medical and ITE applications in mind. With a 4kV ac
reinforced input to output isolation and an output-to-ground isolation of 1500V
ac, the EFE400M meets the safety standards of IEC/UL 60601-1 for medical
equipment, making it suitable for use in B (body) and BF (body floating) type
medical and dental applications. Regulated dc outputs of 12, 24V or 48V dc are
standard, plus other voltages can be provided.
With
a 3.5 x 6.5 inch footprint and less than a 1U profile (1.34 to 1.60 inch) the
EFE400M can be incorporated into designs where space is limited so the end product
can be smaller. Other features such as a redundant operation capability, a
standby voltage output and ITE safety certifications per IEC/UL 60950-1, make
the EFE400M suitable for high-integrity applications including broadcast,
instrumentation, routers, servers, security networks, ATE and factory
automation.
TDK-Lambda
says the EFE400M
series
includes an integrated magnetics transformer (transformer and inductor windings
on the same core) to boost efficiency to typically 90 percent and employs an
8-bit microcontroller for full digital control of the output and to handle
housekeeping routines. This resulted in a 25 percent parts count reduction to
achieve a 45 percent smaller and up to 56 percent lighter design when compared
to similar products. Power densities of up to 15.6W/in3 are achieved under peak
load conditions and 13.1W/in3 under continuous loading.
TDK-Lambda's
control of the EFE400M allows the power supply's performance, such as current
limit and start-up characteristics, to be optimized digitally - this feature
eliminates the hardware changes usually required in analog designs. A reduced
cost primary side control topology is employed, supervised by the
microcontroller and the need for an opto-isolator is eliminated.
Additional
features of the EFE400M include remote on/off and power-good signals; it also
comes with a 5V/2A isolated standby output, which is not affected by the remote
on/off. The inclusion of an ORing FET allows redundant operation of EFE400M
supplies with no external diodes required.
The
EFE400M delivers 400W
continuous power and up to 475W peak for 10 secs. And, non-standard output
voltages can be accommodated easily by precise factory programming. An
additional 12V/1A fan output is included and all models operate from a
universal 90 to 264V ac input with dual-input fusing as standard. Earth leakage
current is less than 300µA at up to 264V ac, fully complying with international
medical safety requirements and active power factor correction (PFC) complies
with EN61000-3-2. Other EMC improving design features include the use of SiC
(silicon carbide) diodes that ensure Curve B EMC conformance.
TDK-Lambda's
EFE400M units are approved to IEC/EN/UL/CSA 60601-1 for medical and dental
applications, IEC/EN 61010-1 for laboratory and process control applications
and IEC/EN/UL/CSA 60950-1 for ITE/general purpose applications. In addition,
the unit carries the CE mark according to the LV Directive and comes with a
three-year warranty. The EFE400M is available in two configurations including:
open-frame or U chassis with an optional cover and temperature-controlled fan.
The
EFE400M series start at $224.00 each in 250 piece quantities.
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