6 X 100Watt Class-D Audio Amplifier Board- TDA7498
©
2004-2012 Sure Electronics Inc.
AA-AB34181_Ver1.0_Page 5
TABLE 2-2 OUTPUT CONNECTION
Connector Mark
Description
J21
Positive Output of Channel 1
J22
Negative Output of Channel 1
J23
Positive Output of Channel 2
J24
Negative Output of Channel 2
J25
Positive Output of Channel 3
J26
Negative Output of Channel 3
J27
Positive Output of Channel 4
J28
Negative Output of Channel 4
J29
Positive Output of Channel 5
J30
Negative Output of Channel 5
J31
Positive Output of Channel 6
Banana Connectors
J32
Negative Output of Channel 6
J15
Output of Channel 1
J16
Output of Channel 2
J17
Output of Channel 3
J18
Output of Channel 4
J19
Output of Channel 5
Terminal Blocks*
J20
Output of Channel 6
Note:
1.
Never connect more than one group of speaker to the audio output
2. Never connect CH1_OUT-, CH2_OUT-, CH3_OUT-, CH4_OUT-, CH5_OUT-,
CH6_OUT- together since they belong to different NETs.
3.
Refer to on-board descriptions for connection details.
2.4 LED Indicators
This amplifier has one power LED indicator which is marked as Power Indicator (D1).
Power Indicator (D1) will be illuminated in green when power-up.
FIGURE 2-4 LED INDICATOR
2.5 Volume Control
K1 and K2 of SW1, SW2 and SW3 have been factory preset as ON to make sure weak
gain of three channels. This can prevent chip from permanent damage caused by
overheat when input signal amplitude is over range. On the other conditions of gain
setting, it is recommended that the output signal amplitude is no larger than the power
supply voltage once the input signal reaches the peak.
For example, the maximum amplitude of the input signal is no more than 323mV RMS
when power supply voltage is 36V, load impedance is 6 ohm and the gain is set at 37.6
dB. The other circumstances can be referred to the input sensitivity from
TABLE 3-1
ELECTRICAL CHARACTERISTICS
.
