Integrated PMbus controller enables GUI programming of digital power controller

March 18, 2013 // By Paul Buckley
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 digital controller with six PWM (pulse width modulation) logic outputs that can be programmed using an  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 synchronous rectifiers.

Energy efficiency is further optimised 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 optimise energy efficiency.

The 4 x 4 mm LFCSP package makes the ADP1051 suitable for high density, ultra-compact isolated DC-to-DC power module or embedded designs for networking, communications and industrial applications ranging typically from 100W upwards.

The ADP1051 power controller is programmed using a 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.

The ADP1051 packaged in a 24-lead LFCSP is available now and priced at $3.90 (1,000). More information; 
www.analog.com/ADP1051