news
September, 2011
Ericsson Extends Vertical-Mount
Voltage Regulator Series for
Space-Critical Applications
•
Built-in energy-optimization algorithms reduce energy consumption
•
Designed for applications where board space is critical, new devices reduces
footprints to less 2cm2
•
Single-in-line BMR462 and BMR463 join the BMR464 in adding assembling flexibility
to surface-mount and through-hole devices delivering high flexibility for designers
Ericsson has introduced two new vertical-mounting members in its family of 3E digital pointof-load (POL) voltage regulators aimed at space-critical applications. The new 12A BMR462SIP (BMR4622002) and 20A BMR463-SIP (BMR4632002) complement the recently
announced 40A BMR464-SIP (BMR4642002) and offer board designers the ability to select
the most appropriate module for their configuration.
The migration from single-core to multi-core processors and advanced FPGAs, in addition to
the increasing trend for system upgrades with new boards featuring additional features, has
led to increasing amounts of functionality being implemented on board-level designs.
Designers now have to assign board-allocation priorities to ‘core’ components such as
microprocessors and limit the space available to ‘peripheral’ devices such as the voltage
regulator.
The 12A BMR462-SIP, 20A BMR463-SIP and 40A BMR464-SIP meet these demands to
save valuable board space for core components, as they enable vertical mounting – also
known as single in-line packaging (SIP), which is often used for devices such as memory
chips, voltage regulators and other control boards. The SIP approach means the BMR462SIP and BMR463-SIP offer footprints of 1.58cm2 and 1.99cm2, respectively, making them
ideal for space-critical applications. The primary applications for these devices are network
routers, data storage and AdvancedTCA (Advanced Telecommunications Computing
Architecture) boards; additionally their low height of 15.6 mm makes them suitable for 15mm
narrow-pitch applications.
“These additions to the 3E family makes Ericsson the first to offer a wide range of PMBuscompliant digitally controlled point-of-load converters in three different footprints in throughhole, single-in-line and surface-mount versions,” said Patrick Le Fèvre, Marketing and
Communication Director of Ericsson Power Modules. “The high level of flexibility offered by
this advanced power module family will aid designers to meet demands for high performance
in space-critical applications.”
news
September, 2011
Both devices offer 66W of power, input voltage from 4.5V to 14V, and typical power
efficiency of 97.1% at 5V input, 3.3V output and half load. The BMR462-SIP and BMR463SIP deliver power densities of 38W/cm2 and 33W/cm2, with dimensions of 20.8 x 7.6 x 15.6
mm (0.82 x 0.30 x 0.612 in) and 26.3 x 7.6 x 15.6 mm (1.035 x 0.30 x 0.612 in), respectively.
The BMR462-SIP and BMR463-SIP are based on Ericsson’s leading-edge digital-core
controller combined with the latest MOSFET technology and built-in energy-optimization
algorithms that contribute to significantly reducing energy consumption and power dissipation
and also deliver an impressive amount of features and level of flexibility. The voltage
regulators can be configured and monitored via the standard PMBus communication protocol
and the company’s intuitive graphical user interface offering designers the ability to fully
optimize power management in high board-density applications.
Most power converters use synchronous rectification to optimize efficiency over a wide range
of I/O conditions. However, at light loads the synchronous MOSFET will typically sink current
and introduce additional energy losses associated with higher peak inductor currents,
resulting in reduced efficiency. The device’s adaptive diode emulation mode turns off the lowside FET gate drive at low load currents to prevent the inductor current from going negative,
reducing the energy losses and increasing overall efficiency.
The two devices also offer a synchronization feature that allows several regulators to be
locked to a common switching frequency to eliminate beat frequencies. This reduces EMI
filtering complexity and the number of external components needed. Additionally, phase
spreading reduces input capacitance requirements, and hence losses, because the peak
current drawn from the input supply is spread over the whole switching cycle.
The BMR462-SIP and BMR463-SIP also feature comprehensive circuit protection including
over-temperature protection (OTP); output short-circuit protection; output over voltage
protection (OVP); and input under voltage lockout (UVLO).
Ericsson was the first company to launch digitally controlled POL (point-of-load) regulators
based on a digital core controller. Through close cooperation with board and systems
designers, the company was the first to release a 21st century power architecture that can be
fully integrated into the rest of the digital chain of processors and associated components.
news
September, 2011
FOR FURTHER INFORMATION, PLEASE CONTACT
Patrick Le Fèvre, Marketing and Communication Director
Ericsson Power Modules
Phone:
+46-10-716 95 07
Reader Inquiry reference:
Reference:
E0156(A)
If printing an Internet address please use Power Modules homepage and/or phone number
to our International sales office:
Europe, Middle East & Africa:+46-10-716 96 20
Asia Pacific:
+ 86-21-5990 3258
Americas:
+1-972-583 6910 or +1-972-583 5254
About Ericsson Power Modules
www.ericsson.com/powermodules