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V•I Chip Pre-Regulator Module

P048F048T12AL

Rev. 1.0

Page 1 of 14

PRELIMINARY

• 48 V input V•I Chip PRM

• Vin range 36 – 75 Vdc

• Low weight – 0.5 oz (14 g)

• Adaptive Loop feedback

• ZVS buck-boost regulator

• 1.5 MHz switching frequency

• 96% Efficiency

• 125˚C operation

P048F048T12AL

Vin = 36 – 75 V

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Pre-Regulator Module

Product Description

The V•I Chip Pre-Regulator Module (PRM) is a very

efficient non-isolated regulator capable of both

boosting and bucking a wide range input voltage. It is

specifically designed to provide a controlled Factorized

Bus distribution voltage for powering downstream

V•I Chip Voltage Transformation Modules (VTMs) —

fast, efficient, isolated, low noise Point-of-Load (POL)

converters. In combination, PRMs and VTMs form a

complete DC-DC converter subsystem offering all of

the unique benefits of Vicor’s Factorized Power

Architecture (FPA): high density and efficiency; low

noise operation; architectural flexibility; extremely fast

transient response; and elimination of bulk capacitance

at the Point-of-Load (POL).

In FPA systems, the POL voltage is the product of the

Factorized Bus voltage delivered by the PRM and the

"K-factor" (the fixed voltage transformation ratio) of a

downstream VTM. The PRM controls the Factorized Bus

voltage to provide regulation at the POL. Because VTMs

perform true voltage division and current multiplication,

the Factorized Bus voltage may be set to a value that is

substantially higher than the bus voltages typically

found in "intermediate bus" systems, reducing

distribution losses and enabling use of narrower

distribution bus traces. A PRM-VTM chip set can

provide up to 100 A, or 115 W at a FPA system density

can be located, or "factorized," remotely from the

POL, these power densities can be effectively doubled.

The PRM described in this data sheet features a unique

"Adaptive Loop" compensation feedback: a single wire

alternative to traditional remote sensing and feedback

loops that enables precise control of an isolated POL

voltage without the need for either a direct connection

to the load or for noise sensitive, bandwidth limiting,

isolation devices in the feedback path.

Actual size

Parameter

Values

Unit

+In to -In

-1.0 to 85.0

Vdc

PC to -In

-0.3 to 6.0

Vdc

PR to -In

-0.3 to 9.0

Vdc

IL to -In

-0.3 to 6.0

Vdc

VC to -In

-0.3 to 18.0

Vdc

+Out to -Out

-0.3 to 59

Vdc

SC to -Out

-0.3 to 3.0

Vdc

VH to -Out

-0.3 to 9.5

Vdc

OS to -Out

-0.3 to 9.0

Vdc

CD to -Out

-0.3 to 9.0

Vdc

SG to -Out

100

mA

Continuous output current

2.5

Adc

Continuous output power

120

W

Operating junction temperature

(M-Grade)

-55 to 125

°C

(T-Grade)

-40 to 125

°C

Storage temperature

(M-Grade)

-65 to 150

°C

(T-Grade)

-40 to 150

°C

Case temperature during reflow:

208

°C

-In

PC

VC

TM

+In

-Out

+Out

VTM

+Out

-Out

K

Ro

+Out

–Out

+In

–In

VC

PC

TM

IL

VH

PR

NC

SG

SC

PRM-AL

OS

NC

CD

Factorized

Vin

Vout

The P048F048T12AL is used with any 048 input series VTM to provide a regulated and

isolated output.

DC-DC Converter

Absolute Maximum Ratings

PRM