Analog Devices introduced the ADP1051 digital power controller with PMBus interface targeting ultra-compact, high-density isolated DC-to-DC power supply systems with parallel/redundant capability.
The IC’s versatility is ensured 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 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 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 startup, 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 IC 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 tiny 4 x 4 mm LFCSP package makes the chip ideal for high-density power module or embedded designs for networking, communications and industrial applications ranging typically from 100 W upwards.
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