Tr i path Technol ogy, I nc. - Techni cal I nfor m ati on
OPERATING INSTRUCTIONS
Power Supply Description
There are four external power supplies required to operate this board: VPP, VNN, VN10, and V5 (see
Figures 1 and 2). VPP and VNN power the load and so must each be able to provide half of the desired
output power, plus about 20% for overhead and margin. The TA3020 amplifier also requires a supply,
VN10, that is 10V more positive than VNN and tracks VNN. All output and power supply connections are
made using tinned wire (not shown).
Though not required, the following powering-up sequence is usually adhered to during bench evaluations:
1
st
) V5 and VN10, 2
nd
) VNN and 3
rd
) VPP (refer to the Turn-on/off Pop section). Please refer to the Turn-
on/off Pop section.
The positive and negative supply voltages do not have to match or track each other, but distortion or
clipping levels will be determined by the lowest (absolute) supply voltage. Figure 1 shows the proper
supply configuration for the RB-TA3020.
VPP (yellow)
V5 (red)
V
S
5V
AGND (black)
PGND (blue)
V
S
10V
VNN (orange)
Figure 1
VN10 (green)
Note:
To avoid signal degradation, the Analog Ground and Power Ground should be kept separate at
the power supply. They are connected locally on the RB-TA3020.
Connector
J5 (Yellow)
J5 (Blue)
J5 (Orange)
J5 (Green)
J1 (Red)
J1 (Black)
Power Supply
VPP
PGND
VNN
VN10
V5
AGND
Table 1
2
RB-TA3020, Rev. 3.0/03.02
TRIPATH [ TRIPATH TECHNOLOGY INC. ]
