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參數(shù)資料
| 型號： | TDA8931 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Power comparator 1 X 20 W |
| 中文描述： | 功率比較1 × 20瓦 |
| 文件頁數(shù)： | 7/31頁 |
| 文件大?。?/td> | 165K |
| 代理商： | TDA8931 |
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9397 750 13847
Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Preliminary data sheet
Rev. 01 — 14 January 2004
7 of 31
Philips Semiconductors
TDA8931
Power comparator 1
×
20 W
The overvoltage protection level can be determined by the formula:
(1)
Where:
V
P(OVP)
= overvoltage protection level of supply voltage
R1 = external resistor
R2 = external resistor
V
OVP
= 1.27 V reference voltage.
Example:
The TDA8931 has to shut down at 24 V. When we choose R2 = 10 k
,
then R1
has to be 178 k
and V
P(OVP)
becomes 24 V.
Remark:
When pin OVP is connected to V
SSD
the V
P(OVP)fix
level is used.
8.6.4
Undervoltage protection (UVP)
When the supply voltage applied to the TDA8931 drops below the minimum supply
voltage threshold level the device is internally set to Standby mode.
8.6.5
Supply voltage drop protection
When the TDA8931T is switched off with the supply, it will be switched off before it
reaches the voltage on pin HVP. This prevents switch-off pop noise. This function is not
self recovering. The TDA8931T can be recovered by switching to Sleep mode or by
removing the supply voltage.
8.6.6
Overdissipation protection (ODP)
In case of a short-circuit across the speaker the dissipation is minimized by the ODP.
When the OCP and the OTP are on the same time activated, an over dissipation is
defined. The device is set to Sleep mode and is not self-recovering. When pin
POWERUP = 0 V or the supply voltage is removed, the device is recovered.
Fig 3.
Overvoltage protection setting
001aac234
V
PA
OVP
R1
R2
TDA8931
V
P OVP
)
--------------------
R2
V
OVP
×
=
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| TDA8931T/N1,118 | 功能描述:校驗器 IC 1 CHAN CLASS D AMPLIFIER 1X15W RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類型: 通道數(shù)量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補(bǔ)償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)時間: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel |
| TDA8931T-T | 功能描述:校驗器 IC 1 CHAN CLASS D AMP 1X15W RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類型: 通道數(shù)量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補(bǔ)償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)時間: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel |
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