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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)： | 5/31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
5 of 31
Philips Semiconductors
TDA8931
Power comparator 1
×
20 W
8.
Functional description
8.1 General
The TDA8931 is a switching power stage for high efficiency class-D audio power amplifier
systems. It contains a Single-Ended (SE) power stage, drive logic, protection control logic,
a full differential input comparator and a HVP charger to charge the SE capacitor (see
Figure 1
). With this amplifier a compact 1
×
20 W closed loop self-oscillating digital
amplifier system can be built. A second order low-pass filter converts the PWM output
signal into an analog audio signal across the speaker.
8.2 Interfacing
The operating modes of the TDA8931 can be controlled by pins POWERUP and ENABLE.
Both pins refer to pin CGND. The device has three modes:
Sleep mode
Standby mode
Operating mode
When pin POWERUP = LOW, the power comparator is in Sleep mode, independent of the
signal on pin ENABLE. In Sleep mode the SE capacitor charger will be discharged.
When pin POWERUP = HIGH and pin ENABLE = LOW the device is in Standby mode. In
Standby mode the device is DC biased and the SE capacitor will be charged and the
output is floating.
When both pins POWERUP and ENABLE are HIGH, the device is in Operating mode. A
level at pin POWERUP greater than 11 V can also enter the Operating mode, independent
of the level on pin ENABLE (see
Table 4
).
Remark:
The switch-on sequence is important. First pin POWERUP = HIGH, then pin
ENABLE = HIGH.
8.3 Input comparator
The input comparator has a full differential input and is optimized for low noise and low
offset. This results in maximum flexibility in the application.
8.4 Half supply voltage input reference (pin HVPI)
When the device is in Standby mode, the external capacitor C6 (see
Figure 5
) will be
charged until it reaches the half of the supply voltage. This pin charges capacitor C6
within 0.5 seconds.
Table 4:
Voltage on pin
POWERUP
< 0.8 V
3 V to 7 V
Interfacing
Mode
ENABLE
-
< 0.8 V
> 3 V
-
Sleep
Standby
Operating
Operating
> 11 V
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| TDA8931T | 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/N1,112 | 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/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 |
| TDA8932 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:2x15W class D Power Amplifier （PHILIPS的數(shù)字功放音質(zhì)好，沒有其它數(shù)字功放很濃的金屬聲） |
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