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TA8258HQ Datasheet(PDF) 2 Page - Toshiba Semiconductor

Part # TA8258HQ
Description  Dual Audio Power Amplifier
Download  13 Pages
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Manufacturer  TOSHIBA [Toshiba Semiconductor]
Direct Link  http://www.semicon.toshiba.co.jp/eng
Logo TOSHIBA - Toshiba Semiconductor

TA8258HQ Datasheet(HTML) 2 Page - Toshiba Semiconductor

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TA8258HQ
2006-10-23
2
Block Diagram
Application Information
1.
Voltage gain
The closed loop voltage gain is determined by R1, R2.
= 34 (dB)
When R3 = 220 Ω
GV ∼− 30 (dB)
is given.
Toshiba has confirmed that the GV (min) is approximately 28 (dB) on a regular printed circuit board. However,
if the value of R2 + R3 is larger, the feedback voltage increases and oscillation will start. Determine the value of
R2 + R3 to ensure proper startup behavior under actual usage conditions.
+
=
400
400
k
20
og
20
λ
(dB)
2
R
R2
1
R
og
20
V
G
+
(dB)
R
R
R
R
R
og
20
G
3
2
3
2
1
V
+
+
+
4/2
R1
20 k
R2
400
5/1
7/12
Output
Input
Figure 1
4/2
R1
20 k
R2
400
5/1
7/12
Output
Input
Figure 2
R3
6
9
IN1
Ripple Filter
VCC
IN1
VCC
IN2
4
7
RL
20 k
3
12
10
RL
2 IN2
AMP1
AMP2
OUT1
OUT2
PW-GND
Pre-GND
5
400
1
20 k
400
8
11
R
C
C
R
Mute. TC
Mute


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