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參數(shù)資料
| 型號： | STA5100 |
| 廠商： | 意法半導(dǎo)體 |
| 元件分類： | 音頻放大器 |
| 英文描述： | 140W MONO BASH POWER AMPLIFIER |
| 中文描述： | 140W的單聲道BASH功放 |
| 文件頁數(shù)： | 7/14頁 |
| 文件大小： | 146K |
| 代理商： | STA5100 |
7/14
STA5100
FUNCTIONAL DESCRIPTION
The circuit contains all the blocks to build a mono amplifier. It is based on the Output Bridge Power Amplifier,
and its protection circuit. Moreover, the compression function and a signal rectifier are added to complete the
circuit.
The operation modes are driven by The Turn-on/off sequence block. In fact the IC can be set in three states by
the Stby/mute pin:
Standby ( V
pin
< 0.8V), Mute (1.6V < V
pin
< 3V), and Play (V
pin
> 4V).
In the Standby mode all the circuits involved in the signal path are in off condition, instead
in Mute mode the circuits are biased but the Speakers Outputs are forced to ground potential.
These voltages can be get by the external RC network connected to Stby/Mute pin.
The same block is used to force quickly the I.C. In standby mode or in mute mode when the I.C. dangerous
condition has been detected. The RC network in these cases is used to delay the Normal operation restore.
The protection of the I.C. are implemented by the Over Temperature, Unbalance Ground, Output Short circuit,
Under voltage, and output transistor Power sensing as shown in the following table:
Table 1. Protection Implementation
See the POWER PROTECTION paragraph for the details
Compression
An other important function implemented, to avoid high power dissipation and clipping distortion, is the Com-
pression of the signal input. In fact the preamplifier stage performs a voltage gain equal to 5, fixed by Ri and Rr
external resistor, but in case of high input signal or low power supply voltage, its gain could be reduced of 26dB.
This function is obtained with a feedback type compressor that , in practice, reduces the impedance of the ex-
ternal feedback network. The behavior of compression it's internally fixed but depends from the Audio input volt-
age signal level, and from the Threshold voltage applied to the Threshold pin. The attack and release time are
programmable by the external RC network connected to the Att_Rel pins.
The constraints of the circuit in the typical application are the following:
Vthreshold range
= -5 to 0
Vin peak max
= 8V
Vout peak max
= 10V
Fault Type
Condition
Protection strategy
Action time
Release time
Chip Over
temperature
Tj > 130 °C
Mute
Fast
Slow Related to
Turn_on sequence
Chip Over
temperature
Tj > 150 °C
Standby
Fast
Slow, Related to
Turn_on sequence
Unbalancing
Ground
|Vgnd| > ((CD+) -
(CD-))/2 + 5V
Standby
Fast
Slow, Related to
Turn_on sequence
Short circuit
Iout > 12A
Standby
Fast
Slow, related to
Turn_on sequence
Under Voltage
|Vs+| + |Vs-|< 20V
Standby
Fast
Slow, related to
Turn_on sequence
Extra power
dissipation
at output transistor
Pd tr. > 50W
Reducing DIGITAL
CONVERTER output
voltage.
Related to the
DIGITAL
CONVERTER
Related to the
DIGITAL
CONVERTER
Maximum power
dissipation
at output transistor
Pd tr. > 96W
Standby
Fast
Slow, related to
Turn_on sequence
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| STA510A | 制造商:STMicroelectronics 功能描述:STA510A - Rail/Tube 制造商:STMicroelectronics 功能描述:AMP AUDIO POWER QUAD POWERSO36 制造商:STMicroelectronics 功能描述:AMP, AUDIO, POWER, QUAD, POWERSO36 |
| STA510A13TR | 制造商:ST 功能描述:0 |
| STA510D | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:60V 5A POWER FULL BRIDGE |
| STA510F | 功能描述:音頻放大器 44V 5.5A Quad PWR Half Bridge 150 mOhm RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| STA510F_11 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:44-V, 5.5-A, quad power half-bridge |
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