Secondary Analysis

The Corsair GS700 Bronze uses a synchronous design, meaning that the rectifiers were replaced with MOSFETs. Also, this power supply uses a DC-DC design, meaning that it is basically a +12 V power supply, with the +5 V and +3.3 V outputs being generated through two smaller switching power supplies connected to the +12 V rail. Both designs are used to increase efficiency.

The +12 V output uses five CEB6056 MOSFETS, each supporting up to 100 A at 25° C in continuous mode or up to 360 A at 25° C in pulse mode, with a maximum RDS(on) of 6.2 mΩ. These transistors are located on a small daughterboard.

Corsair GS700Figure 16: The +12 V transistors

The DC-DC converters are located on a separate printed circuit board. Both are managed by an APW7159 PWM controller, with each output using three AP72T03GH MOSFETs, each supporting up to 63 A at 25° C or 44 A at 100° C in continuous mode or up to 190 A at 25° C in pulse mode, with a maximum RDS(on) of 9 mΩ.

Corsair GS700Figure 17: The DC-DC converters

Corsair GS700Figure 18: The DC-DC converters

The outputs of this power supply are monitored by a WT7502 integrated circuit, which only supports over voltage (OVP) and under voltage (UVP) protections.

Corsair GS700Figure 19: Monitoring circuit

The electrolytic capacitors used in the secondary are from Samxon and labeled at 105° C, as usual. See Figure 20.

Corsair GS700Figure 20: Capacitors

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