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参数资料
| 型号： | TEA2025B |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 2.8 W, 2 CHANNEL, AUDIO AMPLIFIER, PDIP16 |
| 封装： | ROHS COMPLIANT, DIP-16 |
| 文件页数： | 7/11页 |
| 文件大小： | 178K |
| 代理商： | TEA2025B |
5/11
TEA2025
3
APPLICATION INFORMATION
3.1 Input Capacitor
Input capacitor is PNP type allowing source to be referenced to ground.
In this way no input coupling capacitor is required. However, a series capacitor (0.22
F)to the input side
can be useful in case of noise due to variable resistor contact.
3.2 Bootstrap
The bootstrap connection allows to increase the output swing.
The suggested value for the bootstrap capacitors (100
F) avoids a reduction of the output signal also at
low frequencies and low supply voltages.
3.3 Voltage Gain Adjust
3.3.1 STEREO MODE
The voltage gain is determined by on-chip resistors R1 and R2 together with the external RfC1 series con-
nected between pin 6 (11) and ground. The frequency response is given approximated
With Rf=0, C1=100
F, the gain results 46 dB with pole at f=32 Hz.
THE purpose of Rf is to reduce the gain. It is recommended to not reduce it under 36 dB.
3.3.2 BRIDGE MODE
Figure 11.
The bridge configuration is realized very easily thanks to an internal voltage divider which provides (at pin
1) the CH 1 output signal after reduction.
It is enough to connect pin 6 (inverting input of CH 2) with a capacitor to pin 1 and to connect to ground
the pin 7. The total gain of the bridge is given by:
and with the suggested values (C1 = C2 = 100
F, Rf= 0) means: Gv = 52 dB with first pole at f = 32 Hz
V
OUT
V
IN
--------------
R1
Rf
R2
1
JWC1
-----------------
+
÷
---------------------------------------------
=
V
OUT
V
IN
--------------
R1
Rf
R2
1
JWC1
-----------------
+
÷
--------------------------------------------- 1 R3
R4
--------
R1
R2
R4
1
JWC1
-----------------
++
-----------------------------------------------
+
=
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TEA2025D | 功能描述:音频放大器 Stereo Audio Amp RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| TEA2025D013TR | 功能描述:音频放大器 Stereo Audio Amp RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| TEA2025-D16-T | 制造商:UTC-IC 制造商全称:UTC-IC 功能描述:STEREO AUDIO AMPLIFIER |
| TEA2025DL-S20-R | 制造商:UTC-IC 制造商全称:UTC-IC 功能描述:STEREO AUDIO AMPLIFIER |
| TEA2025DL-S20-T | 制造商:UTC-IC 制造商全称:UTC-IC 功能描述:STEREO AUDIO AMPLIFIER |
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