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The +5VSB Power Supply

The +5VSB (a.k.a. standby) power supply is independent of the main power supply, since it is on continuously.

The +5VSB power supply uses an integrated circuit that incorporates the PWM controller and the switching transistor into a single chip. However, the manufacturer scratched off the marking on the chip, so we can’t say which model it is.

Fractal Design Tesla R2 650wFigure 21: The +5VSB integrated circuit with an integrated switching transistor

The rectification of the +5VSB output is performed by an S10C40C Schottky rectifier. This component supports up to 10 A (5 A per internal diode at 125° C, 0.55 V maximum voltage drop).

Fractal Design Tesla R2 650wFigure 22: The +5VSB rectifier

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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.