STMicroelectronicsSTEVAL-ISQ009V1Cartes et kits de développement de gestion de la puissance

The STEVAL-ISQ009V1 demonstration board is composed of three identical sections (daughterboards) and a motherboard. Each daughterboard is capable of performing DCDC conversion starting from +5 VDC and is designed to deliver 3.3 V / 5 A to the load. The input terminals of the motherboard are connected to a +5 VDC external source and the output terminals to the load. The board can accommodate up to three DC-DC converters. The motherboard contains the circuitry necessary to perform current sharing (utilizing the L6615) and to isolate a failed section from the load. It is designed to be adaptable to all power supplies (compatible with the L6615 absolute maximum ratings) having remote sense pins. By changing just a few components, it can be modified for new specifications. It is possible to build a system to supply a 10 A load at +3.3 V in a 2+1 redundant configuration. That is, whenever three sections are running, each of them supplies 3.33 A, a value lower than its nominal capability. If one of them is switched off, the system is able to supply the load, and each section carries 5 A. DC-DC conversion management is performed by the L6910.

-Three paralleled DC-DC converter modules (in 
synchronous buck topology, managed by ST’s 
L6910) 
-Output currents shared through ST current 
sharing controller L6615
-Innovative use of a MOSFET as both the ORing element (replacing OR-ing diode) and 
sensing element (RDS(on)
)
-RoHS compliant

SCHEMATIC PACKS  http://www.st.com/internet/com/TECHNICAL_RESOURCES/TECHNICAL_DIAGRAM/SCHEMATICPACK/steval-isq009v1_schematic.pdf