Nexus RX-6300 630 W Power Supply Review

Secondary Analysis

This power supply uses a partial synchronous design for rectifying the +12 V output, using an FDP038AN MOSFET (80 A at 151° C, 3.5 mΩ RDS(on)) for the direct rectification and a PFR60L45PT Schottky rectifier (60 A, 30 A per internal diode) for the “freewheeling” part of the rectification.

For the +5 V output one S30D40C Schottky rectifier is used, which supports up to 30 A (15 A per internal diode at 125° C) and presents a maximum voltage drop of 0.55 V. This gives us a maximum theoretical current of 21 A or 107 W for the +5 V output.

The +3.3 V output uses another S30D40C Schottky rectifier, presenting a maximum theoretical power of 71 W.

Figure 12: Rectifiers.

This power supply uses a WT751002 monitoring integrated circuit, which is in charge of the power supply protections. Unfortunately the manufacturer from this component does not publish the datasheet for this integrated circuit, so we couldn’t check what protections it really supports.

Figure 13: Monitoring circuit.

Electrolytic capacitors from the secondary are also Taiwanese, from Teapo and labeled at 105° C.