Digital power controllers with PMBus interface targets highest density, energy efficient isolated power converters
3/21/2013 6:09 PM EDT
Analog Devices, Inc. has introduced an advanced digital power
controller with PMBus interface targeting ultra-compact, high density
isolated DC-to-DC Power Supply systems with parallel/redundant capability.
The ADP1051 is a versatile digital controller with six PWM
(pulse width modulation) logic outputs that can be programmed using an
easy-to use graphic user interface
(GUI) via the PMBus interface. The device enables high energy
efficiency topologies including full bridge and active clamp forward
variants with precision drive timing and control of secondary
Energy efficiency is further optimized using adaptive dead-time
compensation to improve the efficiency over the load range and
programmable light load mode operation combined with low device power
consumption (<100 mW) to reduce system low power standby losses. The
ADP1051 implements an extensive PMBus command set including the ability
to accurately read input and output power measurements and enable the
end-user to make intelligent system management decisions to optimize energy efficiency.
The 4 x 4 mm LFCSP package makes the ADP1051 ideal for high density,
ultra-compact isolated DC-to-DC power module or embedded designs for
networking, communications and industrial applications ranging typically
from 100 W upwards.
The ADP1051 power controller is easily programmed using an intuitive
graphical-user interface which enables customers to design and store
settings in the high reliability, internal EEPROM memory. The ADP1051
implements several features to enable a robust system of parallel and
redundant operation for customers that require high availability for
increased current scaling. The device includes master/slave synchronisation, reverse current protection and pre-bias start-up, accurate passive or droop current sharing between power supplies and a patented technique to identify and safely shutdown an erroneous Power Supply in parallel operation mode.
Availability and Pricing
The ADP1051 packaged in a 24-lead LFCSP is available now and priced at $3.90 Price each per 1,000.
More information about the ADP1051 digital power controller at
This article originally appeared on EE Times Europe.