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參數(shù)資料
| 型號： | STA5150 |
| 廠商： | 意法半導體 |
| 元件分類： | 音頻放大器 |
| 英文描述： | 200W MONO BASH POWER AMPLIFIER |
| 中文描述： | 功率200W單聲道BASH功放 |
| 文件頁數(shù)： | 2/14頁 |
| 文件大?。?/td> | 146K |
| 代理商： | STA5150 |
STA5150
2/14
DESCRIPTION
(continued)
Notice that normally only one Digital Converter is needed to supply a stereo or multi-channel amplifier system,
therefore most of the functions implemented in the circuit have summing outputs
The signal circuits are biased by fixed negative and positive voltages referred to Ground. Instead the final stag-
es of the output amplifiers are supplied by two external voltages that are following the audio signal . In this way
the headroom for the output transistors is kept at minimum level to obtain a high efficiency power amplifier.
The Compressor circuits, one for each channel, performs a particular transfer behavior to avoid the dynamic
restriction that an adaptive system like this requires. To have a high flexibility the attack / release time and the
threshold levels are externally programmable. The tracking signal for the external digital converter is generated
from the Absolute Value block that rectifies the audio signal present at the compressor output. The outputs of
these blocks are decoupled by a diode to permit an easy sum of this signal for the multichannel application. The
output power bridges have a dedicated input pin to perform an AC decoupling to cancel the compressor output
DC offset. The gain of the stage is equal to 4 (+12dB). A sophisticated circuit performs the output transistor pow-
er detector that , with the digital converter, reduces the power supply voltage . Moreover, a maximum current
output limiting and the over temperature sensor have been added to protect the circuit itself. The external volt-
age applied to the STBY/MUTE pin forces the two amplifiers in the proper condition to guarantee a silent turn-
on and turn-off.
ABSOLUTE MAXIMUM RATINGS
Notes: 1. V
CD-
must not be more negative than -Vs and V
CD+
must not be more positive than +V
S
THERMAL DATA
Symbol
Parameter
Value
Unit
+V
s
Positive supply voltage referred to pin 13 (GND)
30
V
-V
s
Negative supply voltage referred to pin 13 (GND)
-24
V
V
CD+
Positive supply voltage tracking rail referred to pin 13 (GND)
22
V
V
CD+
Positive supply voltage operated to Vs+
(1)
0.3
V
V
CD-
Negative supply voltage referred to -Vs
(1)
-0.3
V
V
CD-
Negative supply voltage tracking rail referred to pin 13 (GND)
-22
V
V
Att_Rel
Pin 3 Negative & Positive maximum voltage reffered to GND (pin
13)
-0.5 to +20
V
V
Pwr_Imp
VTrk Pin 7, 10 Negative & Positive maximum voltage referred to
GNC (pin 13)
-20 to +20
V
V
In_pre
Pin 8 Negative & Positive maximum voltage referred to GND (pin
13)
-0.5 to +0.5
V
V
threshold
Pin 17 Negative & Positive maximum voltage referred to GND (pin
13)
-7 to +0.5
V
I
stb-max
Pin 11 maximum input current (Internal voltage clamp at 5V)
500
μ
A
V
stbymute
Pin 11 negative maximum voltage referred to GND (pin 13)
-0.5
V
Symbol
Parameter
Value
Unit
T
j
Max Junction temperature
150
°C
R
th j_case
Thermal Resistance Junction to case
.............................. ..
max
1
°
C/W
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