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參數(shù)資料
| 型號(hào)： | TA3020 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | Stereo 300W (4з) Class-T Digital Audio Amplifier Driver using Digital Power ProcessingTM Technology |
| 中文描述： | 立體聲300W的（4з）類- T數(shù)字音頻放大器驅(qū)動(dòng)器使用數(shù)字電源ProcessingTM技術(shù) |
| 文件頁數(shù)： | 23/29頁 |
| 文件大?。?/td> | 284K |
| 代理商： | TA3020 |
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T E C H N I C A L I N F O R M A T I O N
TA3020, Rev 2.1, 01.01
23
The equation for calculating R
VNNSENSE
is as follows:
VNN
R
=
VNNSENSE
VNN1
I
Set
VNN1
VNN2
R
3
R
×
=
.
I
VPPSENSE
or I
VNNSENSE
can be any of the currents shown in the Electrical Characteristics table
for VPPSENSE and VNNSENSE, respectively.
The two resistors, R
VPP2
and R
VNN2
compensate for the internal bias points. Thus, R
VPP1
and R
VNN1
can be used for the direct calculation of the actual VPP and VNN trip voltages without considering
the effect of R
VPP2
and R
VNN2
.
Using the resistor values from above, the actual minimum over voltage turn off points will be:
I
R
VPP
×
=
I
R
(
VNN
VNNSENSE
VNN1
N_OFF
MIN_OV_TUR
×
=
The other three trip points can be calculated using the same formula but inserting the appropriate
I
VPPSENSE
(or I
VNNSENSE
) current value. As stated earlier, the usable supply range is the difference
between the minimum overvoltage turn off and maximum under voltage turn-off for both the VPP and
VNN supplies.
VPP
-
VPP
VPP
=
VNN
-
VNN
VNN
=
VN10 Supply
VN10 is an additional supply voltage required by the TA3020. VN10 must be 10 volts more positive
than the nominal VNN. VN10 must track VNN. Generating the VN10 supply requires some care.
The proper way to generate the voltage for VN10 is to use a 10V-postive supply voltage referenced
to the VNN
supply. Figure 5 shows the correct way to power the TA3020:
Figure 5: Proper Power Supply Connection
RN_OFF)
(MIN_OV_TU
VPPSENSE
VPP1
N_OFF
MIN_OV_TUR
)
RN_OFF)
(MIN_OV_TU
N_OFF
MAX_UV_TUR
N_OFF
MIN_OV_TUR
RANGE
N_OFF
MAX_UV_TUR
N_OFF
MIN_OV_TUR
RANGE
VPP
V5
VN10
VNN
PGND
VPP
VNN
5V
10V
AGND
F. BEAD
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