SHARE

The +5VSB Power Supply

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

On the Fractal Design Newton R3 800 W, the +5VSB power supply has an integrated circuit that incorporates the PWM controller and the switching transistor in a single chip. However, the manufacturer scratched the markings on this chip, making it impossible for us to identify it.

Fractal Design Newton R3 800wFigure 21: The +5VSB integrated circuit with an integrated switching transistor

The rectification of the +5VSB output is performed by an MBR2060CT Schottky rectifier, which supports up to 20 A (10 A per internal diode at 135º C, 0.95 V maximum voltage drop).

Fractal Design Newton R3 800wFigure 22: The +5VSB rectifier

1
2
3
4
5
6
7
8
9
10
11
12
13
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.