Huntkey Win7 6600 Power Supply Review

Secondary Analysis

The Huntkey Win7 6600 uses a regular design in its secondary, with Schottky rectifiers.

The maximum theoretical current that each line can deliver is given by the formula I / (1 – D) where D is the duty cycle used and I is the maximum current supported by the rectifying diode. As an exercise, we can assume a duty cycle of 30 percent.

The +12 V output uses four STPS30L60CT Schottky rectifiers, each one supporting up to 30 A (15 A per internal diode at 130° C with a 0.75 V maximum voltage drop). This gives us a maximum theoretical current of 86 A or 1,029 W for the +12 V output.

The +5 V output uses two STPS30L30CT Schottky rectifiers, each one supporting up to 30 A (15 A per internal diode at 140° C with a 0.57 V maximum voltage drop). This gives us a maximum theoretical current of 43 A or 214 W for the +5 V output.

The +3.3 V output uses two STPS2045CT Schottky rectifiers, each one supporting up to 20 A (10 A per internal diode at 155° C with a 0.84 V maximum voltage drop). This gives us a maximum theoretical current of 29 A or 143 W for the +3.3 V output.

Figure 14: One of the +5 V rectifiers, two of the +12 V rectifiers, and one of the +3.3 V rectifiers

This power supply uses a CG8513 monitoring integrated circuit, but this chip isn’t listed on its manufacturer website, so we can’t comment on the protections it supports. (We can assume that it supports over voltage and under voltage protections.) Additionally, the power supply uses an LM339 voltage comparator to expand the functionalities of the CG8513 integrated circuit.

Figure 15: Monitoring circuit

The electrolytic capacitors that filter the outputs are from Fcon and labeled at 105° C, as usual.