Fractal Design Integra R2 750 W Power Supply Review
The +5VSB Power Supply
Contents
The +5VSB (a.k.a. standby) power supply is independent of the main power supply, since it is on continuously.
On the Fractal Design Integra R2 750 W, the +5VSB power supply uses a TNY279PN integrated circuit, which incorporates the PWM controller and the switching transistor in a single chip.
Figure 19: The +5VSB integrated circuit with an integrated switching transistor
The rectification of the +5VSB output is performed by an SBL1040CT Schottky rectifier, which supports up to 10 A (5 A per internal diode at 95° C, 0.55 V maximum voltage drop).
Figure 20: The +5VSB rectifier