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參數(shù)資料
| 型號： | TDA8932TW |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 25 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO32 |
| 封裝： | 6.10 MM, 0.65 MM PITCH, PLASTIC, MO-153, SOT549-1, HTSSOP-32 |
| 文件頁數(shù)： | 2/45頁 |
| 文件大?。?/td> | 285K |
| 代理商： | TDA8932TW |
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TDA8932_1
Koninklijke Philips Electronics N.V. 2006. All rights reserved.
Preliminary data sheet
Rev. 01 — 11 May 2006
10 of 45
Philips Semiconductors
TDA8932
Class-D audio amplier
In case of a short to one of the supply lines, this will trigger the OCP and the amplier
will be shutdown. During restart the window protection will be activated. As a result
the amplier will not start after 100 ms until the short to the supply lines is removed.
In case of impedance drop (e.g. due to dynamic behavior of the loudspeaker) the
same protection will be activated. The maximum output current is again limited to 4 A,
but the amplier will NOT switch off completely (thus preventing audio holes from
occurring). The result will be a clipping output signal without any artifacts.
8.4.4 Window Protection (WP)
The WP checks the PWM output voltage before switching from Sleep mode to Mute mode
(outputs switching) and is activated:
During the start-up sequence, when pin POWERUP is switched from Sleep mode to
Mute mode. In the event of a short-circuit at one of the output terminals to VDDP1,
VSSP1,VDDP2 or VSSP2 the start-up procedure is interrupted and the TDA8932 waits for
open-circuit outputs. Because the check is done before enabling the power stages, no
large currents will ow in the event of a short-circuit.
When the amplier is completely shutdown due to activation of the OCP because a
short-circuit to one of the supply lines is made, then during restart (after 100 ms) the
window protection will be activated. As a result the amplier will not start until the
short-circuit to the supply lines is removed.
8.4.5 Supply voltage protections
If the supply voltage drops below 10 V, the UnderVoltage Protection (UVP) circuit is
activated and the system will shut down directly. This switch-off will be silent and without
pop noise. When the supply voltage rises above the threshold level, the system is
restarted again after 100 ms.
If the supply voltage exceeds 36 V the OverVoltage Protection (OVP) circuit is activated
and the power stages will shut down. It is re-enabled as soon as the supply voltage drops
below the threshold level. The system is restarted again after 100 ms.
It should be noted that supply voltages > 40 V may damage the TDA8932. Two conditions
should be distinguished:
1. If the supply voltage is pumped to higher values by the TDA8932 application itself
(see also Section 14.3), the OVP is triggered and the TDA8932 is shut down. The
supply voltage will decrease and the TDA8932 is protected against any overstress.
2. If a supply voltage > 40 V is caused by other or external causes, then the TDA8932
will shut down, but the device can still be damaged since the supply voltage will
remain > 40 V in this case. The OVP protection is not a supply voltage clamp.
An additional UnBalance Protection (UBP) circuit compares the positive analog supply
voltage (VDDA) and the negative analog supply voltage (VSSA) and is triggered if the
voltage difference between them exceeds a certain level. This level depends on the sum
of both supply voltages. The unbalance threshold levels can be dened as follows:
LOW-level threshold: VP(th)(ubp)l < 85 × VHVPREF
HIGH-level threshold: VP(th)(ubp)h > 83 × VHVPREF
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TDA8933 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Class-D audio amplifier |
| TDA8933B | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Class D audio amplifier |
| TDA8933BTW | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Class D audio amplifier |
| TDA8933BTW/N2,112 | 功能描述:音頻放大器 Class D audio amplifier 32 leads 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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TDA8933BTW/N2,118 | 功能描述:音頻放大器 Class D audio amplifier 32 leads 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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
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