Advanced Power Conversion PLC is offering a 500W "full brick" dc-dc converter that supplies compact, high efficiency conversion (typically >90%) from lower dc voltages up to higher voltage output. The versatility of the APC500 patented IFB3 (Interleaved Full-Bridge Boost Buck) topology permits nominal input voltages of 24 or 28Vdc to be boosted up to a regulated 28 or 48Vdc in addition to the more usual step-down voltages.
The ability to provide the step-up conversion means that legacy equipment can now continue to be used in conjunction with the higher voltage new equipment without resort to an expensive overhaul of the complete system. Voltage step-up capability is inherent in the IFB3 design topology and is achieved by changing the turns ratio of the patented integrated magnetic component and by changing a small number of components.
These dc-dc converters feature low noise, low input and output ripple current and fixed frequency operation (300kHz) with an external synchronization facility means that filter design can be simplified, thus reducing development time and lowering cost. To further assist designers incorporating the APC500 into power systems, the APC converters have a democratic share feature and true single wire parallel connection between modules. This provides a straightforward, scalable and cost-effective solution to increased power requirements and the versatility needed for N+1 redundancy.
The APC module is able to monitor the internal temperature of the module via the on/off pin voltage. This could be used to give early warning of a system cooling fault or to control a variable speed cooling fan for optimum performance. This feature is in addition to the normal protection functions such as over-voltage, under-voltage and short circuit protection that ensure safe and continued operation of the power system without additional design input.
