Altera Cyclone III Development Board - Manual (Page 72)

2–62 Chapter 2: Board Components
Power Supply
Cyclone III 3C120 Development Board Reference Manual © March 2009 Altera Corporation
Power Supply
The board’s power is provided through an IBM laptop style DC power input. The
input voltage must be in the range of 14 V to 20 V. The DC voltage is then stepped
down to the various power rails used by the components on the board and installed
into the HSM connectors.
Figure 2–17 shows the power distribution system, which uses current power rails as
described in “POWER SELECT Rotary Switch” on page 2–21 . Regulator inefficiencies
and sharing are reflected in the currents shown.