TM PRM Regulator P RM48BH480x250A00 S C NRTL US High Efficiency Converter Features Product Ratings V = 38.0 V to 55.0 V P = 250 W IN OUT 48.0 V input (38.0 V to 55.0 V), = 48.0 V V OUT non-isolated ZVS buck-boost regulator I = 5.21 A OUT (20.0 V to 55.0 V Trim) 20.0 V to 55.0 V adjustable output range 2 250 W output power in 0.57 in footprint 96.7% typical efficiency, at full load 3 3 1676 W/in (102 W/cm ) Power Density 5.29 MHrs MTBF (MIL-HDBK-217 Plus Parts Count) Pin selectable operating mode Product Description Adaptive Loop TM The VI Chip PRM Regulator is high e ciency converter, Remote Sense / Child operating from a 38.0 to 55.0 Vdc input to generate a regulated Half VI Chip Package 20.0 to 55.0 Vdc output. The ZVS buck-boost topology enables 22.0mm x 16.5mm x 6.73mm high switching frequency (~ 1.03 MHz) operation with high conversion e ciency. High switching frequency reduces the size of reactive components enabling power density up to 3 1676 W/in . Typical Applications The Half VI Chip package is compatible with standard pick- and-place and surface mount assembly processes with a planar High Density Power Supply DC-DC rail outputs thermal interface area and superior thermal conductivity. High Density ATE system DC-DC power In a Factorized Power Architecture system, the PRM and Telecom NPU and ASIC core power TM downstream VTM current multiplier minimize distribution Communications Systems and conversion losses in a high power solution, providing an Non-isolated and isolated power converters isolated, regulated output voltage. The PRM48BH480x250A00 has two selectable modes of regulation depending on the application requirements. In Adaptive Loop Operation, the PRM48BH480x250A00 utilizes a unique feed-forward scheme that enables precise regulation of an isolated POL voltage without the need for remote sensing and voltage feedback. In Remote Sense Operation, the internal regulation circuitry is disabled, and an external control loop and current sensor maintain regulation. This a ords exibility in the design of both voltage and current compensation loops to optimize performance in the end application. PRM Regulator Rev 1.7 Page 1 of 42 11/2020 PRM48BH480x250A00 Typical Applications PRM ENABLE VAUX REF/ VTM TRIM REF EN ON/OFF V OUT CONTROL Adaptive Loop Temperature Feedback AL VT TM +OUT VTM Start Up Pulse SHARE/ VC VC CONTROL NODE SGND R R TRIM AL IFB PC C OUT SGND Vin +IN +OUT +IN L F VF: 20 V to 55 V C IN C F OUT IN OUT IN SGND GND PRIMARY SECONDARY SEC GND ISOLATION BOUNDRY SGND Typical Application: PRM48BH480x250A00 + VTM Adaptive Loop Configuration V REF SGND REF 3312 SGND PRM IN OUT Voltage Sense and Error Amplifier (Differential) ENABLE VAUX GND REF/ VTM ON/OFF TRIM REF EN CONTROL SGND SGND AL VT TM +OUT Voltage Reference with Soft Start SHARE/ SGND VC VC CONTROL NODE VTM Start up Pulse V + V PC IFB VOUT C SGND LOAD OUT +IN IN V +IN +OUT +IN IN L F C C External Current Sense IN F IN OUT IN OUT SGND 1 1 GND GND PRIMARY SECONDARY ISOLATION BOUNDRY SGND Typical Application: PRM48BH480x250A00 + VTM, non-isolated Remote Sense Configuration 1 Non-Isolated Conguration: Out connected to -IN PRM Regulator Rev 1.7 Page 2 of 42 11/2020 Voltage Sense