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AN74
SiL I N K PS-EVB U S E R ’ S G U I D E
Introduction
The SiLinkPS-EVB is a system power supply board that
provides all the necessary supply voltages for a variety
of Silicon Laboratories’ ProSLIC and silicon DAA
evaluation boards. When used with an appropriate ac/
dc wall adapter, the SiLinkPS-EVB can provide up to
25 W of total output power. Table 1 lists some typical
voltages and currents at the power supply outputs.
Table 1. Power Supply Specifications
ProSLIC daughter cards to create a modular evaluation
platform.
The SiLinkPS-EVB circuit is based on two power supply
controllers from Linear Technology that provide high
efficiency and low bill-of-materials cost. Both circuits
can be synchronized to the same switching frequency to
reduce power supply switching noise. The outputs can
be configured to support both internal and external
ringing architectures by setting the provided jumpers to
Input/Output
V IN
VBRNG
VBHI
VBLO
V DD
Voltage
9–15 V
–96 V
–52 V or
–78 V
–26 V
3.3 V/5 V
Current
2.5 A
100 mA
100 mA
200 mA
1A
Power
22–37 W
9.6 W
5.2 W or
7.8 W
5.2 W
3.3 W/5 W
set the desired output voltages. Further modifications
are possible to realize specific output voltage and
current requirements provided the total output power
does not exceed the rated maximum. Schematic
capture and layout gerber files are available for
integration into specific applications. Figure 1 illustrates
a simplified block diagram of the SiLinkPS-EVB supply
board.
Operating Instructions
The SiLinkPS-EVB board should always be connected
to the ProSLIC evaluation board platform prior to turning
Any combination of outputs is possible as long as the
simultaneous total power from all outputs does not
exceed the maximum rated 25 W and can be sufficiently
supported by the input power from the V IN .
The SiLinkPS-EVB is designed with the same footprint
as all ProSLIC evaluation board daughter cards
on the power supply. Plugging any ProSLIC board into a
live high-voltage supply can permanently damage the
ProSLIC ICs. The user should exercise caution when
touching any part of the SiLinkPS-EVB because
dangerous high voltages are present and can cause
injury.
allowing it to be used in conjunction with multiple
VBRNG
High
Voltage
Battery
Supply
Jumper
Selection
JP2, JP3,
JP4
VBHI
VBLO
VDC in
VDD
Low
JP6 VDD on/off
Voltage
VDD
Supply
JP5 3.3 V/5 V Selector
Figure 1. SiLinkPS-EVB Power Supply Simplified Block Diagram
Rev. 0.2 8/03
Copyright ? 2003 by Silicon Laboratories
AN74-DS02
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