Technology Distributed Power Supply for Server Overview PC servers and commercial servers both utilize distributed power supplies. The power supplies for large servers consist of three main sections a block that converts external AC into DC a block that boosts the power efficiency and a POL block. The POL converts the DC (12 V, 24 V, or 48 V) and distributed the required voltages by the individual circuit blocks to each PCB in the system. Renesas meets the requirements of customers developing distributed power supplies by offering an extensive lineup of products including PFC devices devices for use in insulated switching power supplies PWM control devices power MOSFET devices and IGBTs. System Block Diagram RJ60S5DPN, other RJS6005TDP RJK0654DPB, other 12 V bus AC/DC *1 DC/DC PFC 12V(HDD,Fans) AC POL, Buck Converter *2 input SR ORing SW 12V *3 Vg1 Vg2 POL-Sip 5.0V POL 2.5V RJK03C0DPA L (30V/1.6m) POL 1.8V RJK0456DPB,0656DPB Vg3 Vg4 (40V/2.6m,60V/4.5m) Control IC Vg1 POL 1.5V *6 Vg2 for PFC PWM + Sync.Rect. IC Vg3 R2A20121, R2A20124A R2A20104 Vg4 *4 VRM ,VRD 1.3V *5 RJ60S5DPN, other VRM,VRD 300-400 V DC 1.3V CPU Feedback circuit for Output voltage core Photocoupler PS2561D-1, other *1 PFC :Power Factor Correction Circuit *2 SR : Synchronous Rectification *3 POL : Point Of Load *4 VRM : Voltage Regulator Module *5 VRD : Voltage Regulator Down *6 PWM : Pulse Width Modulation Latest application information here. System Block Diagram For Insulated DC/DC Power Supply (Brick Converter Example) RJK0654DPB Brick Converter RJK0654DPB Buck Converter Full Bridge Topology 1.8V POL- Memory Sip DC 1.5V L 48V Chip Set POL FB 1.3V Full Bridge Synchronous Rectification CPU Core VRD AC/DC + Control MOSFET Control AC (Rectifier) input Control IC R2A20121/124A 12V Bus Half Bridge Topology *1 *2 Primary SW Secondary SR PFC DC-DC RJK0654DPB Control IC Half DC Bridge 48V Control For Datacom , Network Buck Converter and Telecom FB RJK0654DPB FB 48V 1.8V POL- Memory DC Bus Active Clamp Topology Sip 1.2V ChipSet POL Shunt 1V RJK1557DPA Reg IC CPU Core VRD c Control IC 3.3V,5V Bus Feedback circuit for Output voltage RJK0654DPB *1 PFC :Power Factor Correction Circuit Photocoupler PS2561D-1, other *2 SR : Synchronous Rectification Latest application information here.