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参数资料
| 型号： | TDA8576T-T |
| 厂商： | NXP SEMICONDUCTORS |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 2 CHANNEL, AUDIO AMPLIFIER, PDSO16 |
| 封装： | PLASTIC, SOT-108, SO-16 |
| 文件页数： | 11/16页 |
| 文件大小： | 107K |
| 代理商： | TDA8576T-T |
1998 Oct 16
4
Philips Semiconductors
Product specication
Class-H high-output voltage level line
driver
TDA8576T
PINNING
SYMBOL
PIN
DESCRIPTION
VCCL
1
supply voltage left channel
INL
2
input voltage left channel
SVRL
3
SVRR left channel
INML
4
inverting input left channel
INMR
5
inverting input right channel
SVRR
6
SVRR right channel
INR
7
input voltage right channel
VCCR
8
supply voltage right channel
CR+
9
lift capacitor (+) right channel
CR
10
lift capacitor (
) right channel
RGND
11
ground right channel
OUTR
12
output voltage right channel
OUTL
13
output voltage left channel
LGND
14
ground left channel
CL
15
lift capacitor (
) left channel
CL+
16
lift capacitor (+) left channel
Fig.2 Pin configuration.
handbook, halfpage
TDA8576T
MGE670
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VCCL
INL
SVRL
INML
INMR
SVRR
INR
VCCR
CR
+
CR
RGND
OUTR
OUTL
LGND
CL
CL
+
FUNCTIONAL DESCRIPTION
Lift amplier
The lift amplifier, referred to as LIFT AMP. in Fig.1, is used
as a non-inverting amplifier with a voltage gain of 6 dB set
by an internal feedback network. If the output voltage of
the signal amplifier is low, the external lift capacitor is
recharged by the lift amplifier. As soon as the output
voltage of the signal amplifier increases above 0.87
× V
CC
the lift amplifier switches the voltage of the lift capacitor in
series with the supply voltage VCC. The voltage at the
positive side of the lift capacitor is referred to as lifted
supply voltage.
Signal amplier
The signal amplifier, referred to as SIGNAL AMP. in Fig.1,
is used as a non-inverting amplifier. The voltage gain Gv is
set by the feedback resistors according to the formula:
and should be set to 6 dB. The LIFT AMP. and SIGNAL
AMP. must have equal voltage gain Gv.
G
v
1
R
2
R
1
-------
+
=
The rail-to-rail output stage of the signal amplifier uses the
lifted supply voltage to increase the output voltage swing.
The DC output level is set to
≈0.87 × VCC. The maximum
peak-to-peak output voltage of the signal amplifier is
calculated with the formula:
Buffers
The buffers prevent loading of the internal voltage divider
network made by a series connection of resistors. For a
good supply voltage ripple rejection this internal voltage
divider network has to be decoupled by an external
capacitor.
Reference
This circuit supplies all currents needed in the device.
V
op
p
–
() max
()
2
0.87V
CC
0.4
–
()
×
≈
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