Magnetics Business & Technology - November/December 2022 - 22

PRODUCT NEWS
New Current Sense Transformers & Trans-Inductors from Pulse
Pulse Electronics has added to its extensive line of power electronics
components with a new series of current sense transformers
and also innovative trans-inductors for voltage regulation.
The new products feature advanced winding and magnetic sensing
technologies applied to high-volume manufacturing capability
and pricing.
A new PAS6322 series of low-profile current sense transformers
become part of the company's diverse line of current sense
transformers depicted above (PAS6322 not shown). Current
sense magnetics are used as a low loss method for sensing AC
current in a circuit and also provide electrical and safety isolation
between the source of the current and the measurement circuit.
The new series supports current measurement of up to 50Arms.
" Our integrated single turn design simplifies current sensing
and reduces complexity of hand placing a bus wire during PCB
assembly while still allowing for up to 50Arms, " said David Wiest,
product marketing manager for the Power Business Unit of
Pulse. " The low profile, 5kVdc isolation, reinforced insulation and
capability of up to 10mm creepage make this part ideal for use in
kilowatt-plus LLC and PSFB converters. " Explanation of current
sense magnetics can be seen in a white paper, " How Does it
Work- Current Sense Magnetics " .
Trans-Inductor Voltage Regulators
In another recent product development, Pulse continues to expand
its portfolio of inductors used to power processors, memory,
FPGAs and ASICs in servers, datacenters and storage systems.
Its latest additions are specifically designed for use with the
trans-inductor voltage regulator (TLVR) topology and leverage
the company's high-volume automated manufacturing to make
the dual winding inductor and compensation choke. The TLVR
topology enables faster transient response and utilizes a dual
winding power bead inductor.
" Trans-Inductor Voltage Regulators (TLVRs) are an exciting
development that enables ultra-fast transient response in multiphase
voltage regulators and leverages our existing automated
inductor infrastructure allowing us to quickly and effectively
develop products for TLVR, " notes Wiest.
Traditionally, these applications
have used single winding inductor
used in a multi-phase buck
topology which allows currents
to be distributed though parallel
paths or phases. By operating
each phase in a staggered
fashion, the ripple currents in
each phase tend to cancel at
the output and the overall ripple
current seen at the load is much smaller than the ripple on each
phase. This approach allows smaller inductances to be used
(typically on the order of 50-300nH) and can allow design engineers
a trade-off between how quickly the converter responds to
a change in the load current (transient response) verses stability
of the control loop. By adjusting the number of phases used in
the converter, the designer has flexibility to optimize the circuit
for their specific application
Dual Winding TLVR Inductor & Compensation Choke
However, as processors and FPGA's demand faster and larger
22 Magnetics Business & Technology * November/December 2022
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Magnetics Business & Technology - November/December 2022

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