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參數(shù)資料
| 型號(hào)： | TDA7377H |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 2 x 30WDUAL/QUAD POWER AMPLIFIER FOR CAR RADIO |
| 中文描述： | 2 × 30WDUAL/QUAD功率放大器汽車收音機(jī) |
| 文件頁(yè)數(shù)： | 6/10頁(yè) |
| 文件大?。?/td> | 254K |
| 代理商： | TDA7377H |
Reliable and safe operation, in presence of all
kinds of short circuit involving the outputs is as-
sured by BUILT-IN protectors. Additionally to the
AC/DC short circuit to GND, to V
S
, across the
speaker, a SOFT SHORT condition is signalled
out duringthe TURN-ON PHASE so assuringcor-
rect operation for the device itself and for the
loudspeaker.
This particular kind of protection acts in a way to
avoid that the device is turned on (by ST-BY)
when a resistive path (less than 16 ohms) is pre-
sent between the output and GND. As the in-
volved circuitry is normally disabled when a cur-
rent higher than 5mA is flowing into the ST-BY
pin, it is important, in order not to disable it, to
have the external current source driving the ST-
BY pin limited to 5mA.
This extra functionbecomes particularly attractive
when, in the single ended configuration, one ca-
pacitor is shared between two outputs (see fig.
21).
Supposing that the output capacitor C
out
for any
reason is shorted, the loudspeaker will not be
damaged being this soft short circuit conditionre-
vealed.
DiagnosticsFacility
The TDA737
7
is equipped with a diagnostic cir-
cuitry able to detectthe followingevents:
Clipping in the outputsignal
Thermal shutdown
Outputfault:
– shortto GND
– shortto V
S
– softshort at turnon
The information is available across an open
collector output (pin 10) through a current sink-
ing whenthe event is detected
A current sinking at pin 10 is triggered when a
certain distortion level is reached at any of the
outputs. This function allows gain compression
possibility wheneverthe amplifieris overdriven.
ThermalShutdown
In this case the output 10 will signal the proximity
of the junction temperature to the shutdown
threshold. Typically current sinking at pin 10 will
start ~10
°
C before the shutdown threshold is
reached.
HANDLING OF THE DIAGNOSTICS INFORMA-
Figure23:
OutputFault Waveforms (seefig.24)
Figure 21.
Figure22:
ClippingDetectionWaveforms
TDA737
7
TDA737
7
6
/1
0
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| TDA7377L-J15-D-T | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:2 x 30W DUAL/QUAD POWER AMPLIFIER FOR CAR RADIO |
| TDA7377V | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:2 x 30WDUAL/QUAD POWER AMPLIFIER FOR CAR RADIO |
| TDA7378 | 功能描述:音頻 DSP INFOTAINMENT S PWR RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風(fēng)格: 封裝 / 箱體: 封裝:Tube |
| TDA7379 | 功能描述:音頻放大器 Car-Radio Amplifier 18V Op 28V DC 36W 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 |
| TDA7381 | 功能描述:音頻放大器 4X25W Quad Brdg Amp 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 |
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