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參數資料
| 型號： | TDA7563 |
| 廠商： | 意法半導體 |
| 元件分類： | 音頻放大器 |
| 英文描述： | MULTIFUNCTION QUAD POWER AMPLIFIER WITH BUILT-IN DIAGNOSTICS FEATURES |
| 中文描述： | 多功能四功率放大器，內置診斷特征 |
| 文件頁數： | 12/20頁 |
| 文件大小： | 245K |
| 代理商： | TDA7563 |
TDA7563
12/20
– STOP = Actual reading operation
Excess offset is signalled out if persistent throughout the assigned testing time. This feature is disabled if any
overloads leading to activation of the short-circuit protection occurs in the process.
MULTIPLE FAULTS
When more misconnections are simultaneously in place at the audio outputs, it is guaranteed that at least one
of them is initially read out. The others are notified after successive cycles of I
2
C reading and faults removal,
provided that the diagnostic is enabled. This is true for both kinds of diagnostic (Turn on and Permanent).
The table below shows all the couples of double-fault possible. It should be taken into account that a short circuit
with the 4 ohm speaker unconnected is considered as double fault.
S. GND (so) / S. GND (sk) in the above table make a distinction according to which of the 2 outputs is shorted
to ground (test-current source side= so, test-current sink side = sk). More precisely, in Channels LF and RR, so
= CH+, sk = CH-; in Channels LR and RF, so = CH-, sk = CH+ .
In Permanent Diagnostic the table is the same, with only a difference concerning Open Load(*) , which is not
among the recognisable faults. Should an Open Load be present during the device's normal working, it would
be detected at a subsequent Turn on Diagnostic cycle (i.e. at the successive Car Radio Turn on).
FAULTS AVAILABILITY
All the results coming from I
2
Cbus, by read operations, are the consequence of measurements inside a defined
period of time. If the fault is stable throughout the whole period, it will be sent out.
To guarantee always resident functions, every kind of diagnostic cycles (Turn on, Permanent, Offset) will be
reactivate after any I
2
C reading operation. So, when the micro reads the I
2
C, a new cycle will be able to start,
but the read data will come from the previous diag. cycle (i.e. The device is in Turn On state, with a short to Gnd,
then the short is removed and micro reads I
2
C. The short to Gnd is still present in bytes, because it is the result
of the previous cycle. If another I
2
C reading operation occurs, the bytes do not show the short). In general to
observe a change in Diagnostic bytes, two I
2
C reading operations are necessary.
THERMAL PROTECTION
Thermal protection is implemented through thermal foldback (fig. 21). Thermal foldback begins limiting the audio
input to the amplifier stage as the junction temperatures rise above the normal operating range. This effectively
limits the output power capability of the device thus reducing the temperature to acceptable levels without totally
interrupting the operation of the device. The output power will decrease to the point at which thermal equilibrium
is reached. Thermal equilibrium will be reached when the reduction in output power reduces the dissipated pow-
er such that the die temperature falls below the thermal foldback threshold. Should the device cool, the audio
level will increase until a new thermal equilibrium is reached or the amplifier reaches full power. Thermal fold-
back will reduce the audio output level in a linear manner.
Double fault table for Turn On Diagnostic
S. GND (so)
S. GND
/
/
/
/
S. GND (sk)
S. GND
S. GND
/
/
/
S. Vs
S. Across L.
S. GND
S. GND
S. Vs
S. Across L.
/
Open L.
S. GND
Open L. (*)
S. Vs
N.A.
Open L. (*)
S. GND (so)
S. GND (sk)
S. Vs
S. Across L.
Open L.
S. Vs + S. GND
S. Vs
S. Vs
/
/
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TDA7563A | 功能描述:音頻放大器 4 x 50W Multi Quad Power Amplifer D RoHS:否 制造商:STMicroelectronics 產品: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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TDA7563AH | 功能描述:音頻放大器 4 x 50W Multi Quad Power Amplifer D RoHS:否 制造商:STMicroelectronics 產品: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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TDA7563APD | 功能描述:音頻放大器 4 x 50W Multi Quad Power Amplifer D RoHS:否 制造商:STMicroelectronics 產品: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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TDA7563APDTR | 功能描述:音頻放大器 4x28V 4Ohm 14.4V High Eff Quad Amp RoHS:否 制造商:STMicroelectronics 產品: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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TDA7563ASM | 功能描述:音頻放大器 4 x 50W Multi Quad Power Amplifer D RoHS:否 制造商:STMicroelectronics 產品: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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
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