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Secondary Analysis

As one would expect in a high-efficiency power supply, the NZXT HALE90 V2 850 W uses a synchronous design, where the Schottky rectifiers are replaced with MOSFETs, which is done in order to increase efficiency.

The +12 V output uses four IPP023NE7N3 G MOSFETs, each one supporting up to 120 A at 100° C in continuous mode, or up to 480 A at 25° C in pulse mode, with a maximum RDS(on) of 2.3 mΩ.

NZXT HALE90 V2 850wFigure 16: The +12 V transistors

The +5 V output uses one PSMN2R6-40YS (“2R640PBm”) MOSFET for the direct rectification. This transistor supports up to 100 A at 100° C in continuous mode, with a maximum RDS(on) of 3.7 mΩ. For the “freewheeling” part of the rectification, one IPD036N04L G MOSFET is used. This transistor supports up to 90 A at 25° C or 87 A at 100° C in continuous mode or up to 400 A at 25° C in pulse mode, with a maximum RDS(on) of 3.6 mΩ. These transistors are controlled by an FSP6601 custom integrated circuit.

The +3.3 V output uses the same configuration as the +5 V output, as described above.

NZXT HALE 92 V2 850wFigure 17: The +5 V and +3.3 V transistors

NZXT HALE 92 V2 850wFigure 18: The two synchronous controllers

The outputs are monitored by a WT7527 integrated circuit, which supports over voltage (OVP), under voltage (UVP), and over current (OCP) protections. There are two +12 V over current protection (OCP) channels, but the manufacturer decided to use only one of them, giving this unit a single +12 V rail.

NZXT HALE 92 V2 850wFigure 19: Monitoring circuit

This power supply uses Japanese electrolytic capacitors, from Chemi-Con, labeled at 105° C in its secondary. There are some solid capacitors on the printed circuit board of the modular cabling system.

NZXT HALE 92 V2 850wFigure 20: Capacitors

NZXT HALE 92 V2 850wFigure 21: Capacitors

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Gabriel Torres is a Brazilian best-selling ICT expert, with 24 books published. He started his online career in 1996, when he launched Clube do Hardware, which is one of the oldest and largest websites about technology in Brazil. He created Hardware Secrets in 1999 to expand his knowledge outside his home country.