proliferation of IoT devices is driving the need for large amounts of computing
in the cloud. So data centers are experiencing substantial growth and they need
efficient power so can deliver high efficiency while minimizing the heat. In
data centers electricity is consumed when powering these data centers but also
in the cooling of the data centers. The solution has to be increased power density
so that the footprint can be minimized.


launches a new platform product called digital multiphase that includes digital
multiphase controllers and companion power stage products that is a power
solution for supporting infrastructures for data centers, wireless bay stations,
networking switches and routers. The platform supports high current loads for
devices such memory chips.


The product
is digital and can be tuned on the fly, changing quickly as the need arises. The
multiphase controllers feature a digital compensator that helps power designer
develop solutions that have no external compensation because device tuning is
managed digitally with software. The company says that complete power solution
can be developed in 30 minutes compared to spending days managing RC tables
with competing designs.





The product
solution provides different interfaces and all of them provide a PMBus for the
data out telemetry features. It also provides the adaptive voltage scaling
interface (AVSBus), which is an interface between the device and the processor.
The processor determines how much power is required and essentially tells the
controller what it needs to support different tasks. The controller supports Intel,
IBM, AMD, Broadcom, ARM, Qualcomm and other processor chips.


The product
also supports optical transport, routers and switches for wired infrastructure,
base stations and line cards for wireless needs, and server, storage and
accelerator cards for the data center.


Intersil says
that the solution features 12 digital multiphase controllers and a companion smart
power stage, including the industry’s first digital solution with an Adaptive
Voltage Scaling Bus (AVSBus). The new digital controllers provide up to seven
phases assignable in any combination across two outputs, and combine with smart
power stages to provide a scalable solution from 10 A to 450 A. The result is enhanced
power optimization and more energy-efficient networking and communications
infrastructure equipment.


AVSBus joins
the PMBus V1.3 specification and features a 50 MHz high-speed bus that connects
directly to the processor to communicate telemetry data and deliver efficiency
savings through adaptive voltage positioning. Intersil’s new dc/dc controllers
and the ISL99227 60-A smart-power stage support demanding CPU core voltages,
memory, and auxiliary power rails, enabling power designers to customize their
solution to meet any rail requirements.


The digital
multiphase family is comprised of three groups of controllers. The ISL68137 and
ISL68134 controllers use the AVSBus to power and communicate with ARM-based
processors in network routers, switches, servers, storage, and wireless telecom
equipment. Two general-purpose controllers (ISL68127 and ISL68124) power network
processors, FPGAs, SoCs and graphics accelerators. And eight controllers
(ISL69147/44, ISL69137/34, ISL69128/27 and ISL69125/24) add a secondary
high-speed interface (SVID or SVI2) to power the latest Intel and AMD
processors in cloud computing applications that make up the Internet of Things
(IoT) backbone.


The ISL681xx
and ISL691xx controllers integrate a high performance digital engine featuring a
patented synthetic current control architecture that tracks each phase current
with zero latency. This allows the device to respond to any load transient with
precise current and voltage positioning, and 30% less capacitance than
competitive devices. Synthetic current control also makes it possible to
develop high reliability systems using all ceramic capacitors.


Engineers are
able to realize the flexibility and benefit of digital control through
Intersil’s PowerNavigator GUI software tool. PowerNavigator connects to
development boards communicating across PMBus and AVSBus, allowing engineers to
set up and control all parameters, optimize efficiency via precise current
thresholds for adding/dropping phases, and adjust the loop tuning.
PowerNavigator eliminates board rework as designs are completed with on the fly
changes for stability tuning and optimization. The final configuration is
simply stored to non-volatile memory.


The ISL681xx and ISL691xx digital multiphase controllers and ISL99227 smart power stage are available now,
with detailed controller pricing in the table below. The ISL99227 smart power
stage is supplied in a 5mm x 5mm, 32-lead QFN package and is priced at $5.21
USD in 1k quantities. Development boards are also available to help engineers
scale power supply performance and select connectivity requirements for rapid
prototyping and development.