TDA1400 Tripath Technology, TDA1400 Datasheet - Page 18

• Manufacturer Part Number: TDA1400
• Description: MONO CLASS-T DIGITAL AUDIO AMPLIFIER DRIVER
• Manufacturer: Tripath Technology

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For SINGLE-SUPPLY operation:
The modulator feedback resistors are:
For example, in a system with a SINGLE-SUPPLY of VPP
The resultant modulator gain is:
For SPLIT-SUPPLY operation:
The modulator feedback resistors are:
The above equations assume that VPP=|VNN|.
For example, in a system with a SPLIT-SUPPLY of VPP
The resultant modulator gain is:
18
A
AV
V
-
-
MODULATOR
MODULATOR
R
R
R
R
R
R
R
R
R
R
R
R
A
A
FBA
FBB
FBC
FBA
FBB
FBC
FBB
FBC
FBB
FBA
FBB
FBC
V
V
-
-
= 2.22kΩ, use 2.21kΩ, 1%
= 1kΩ, 1%
= 1kΩ, 1%
= 1.071kΩ, use 1.07kΩ, 1%
= 20kΩ, 1%
= 15.0kΩ, use 15.0kΩ, 1%
MODULATOR
MODULATOR
=
=
=
=
=
=
350
User
≈
User
2333.33
R
R
(1000
(VPP
FBA
FBA
20.0k Ω
*
≈
specified,
VPP
*
*
4
specified,
15.0k Ω
+
VPP
VPP
≈
≈
-
1.0k Ω
*
R
4)
R
R
R
*
−
FBC
1.0k Ω
FBC
FBC
(1.0k Ω
FBC
1000
*
)
R
R
(1.0k Ω
*
*
*
typically
FBA
FBA
(R
(R
2.21k Ω
*
typically
1.07k Ω
FBA
FBA
*
*
+
R
R
+
2.21k
+
+
FBB
FBB
1.07k
R
R
1K
FBB
FBB
1K
Ω
Ω
Ω
)
)
)
)
Ω
+
+
+
+
1
1
1
1
=
=
30.02V/V
30.05V/V
MAX
T r i p a t h T e c h n o l o g y , I n c . - P r e l i m i n a r y I n f o r m a t i o n
MAX
=60V and VNN
= 60V,
MAX
T D A 1 4 0 0 – R e v . 0 . 6 5 / K L i / 0 2 . 0 6
=-60V,