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| 型号： | TS4956EIKJT |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 1.055 W, 2 CHANNEL, AUDIO AMPLIFIER, PBGA18 |
| 封装： | ROHS COMPLIANT, FCP-18 |
| 文件页数： | 29/52页 |
| 文件大小： | 1709K |
| 代理商： | TS4956EIKJT |
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TS4956
Application information
35/51
4
Application information
The TS4956 integrates 4 monolithic power amplifiers and has one differential input and two
single-ended inputs. The output amplifiers can be configured in 7 different modes as one SE
(single-ended) capacitively-coupled output, two phantom ground headphone outputs and
two BTL outputs.
Figure 1 on page 3 and Figure 2 on page 4 shows schemes of these
configurations and
Table 7 on page 6 describes these configurations in different modes.
This chapter gives information on how to configure the TS4956 in application.
4.1
Output configurations
4.1.1
Shutdown
When the device is in shutdown mode, all of the device’s outputs are in a high impedance
state.
4.1.2
Single-ended output configuration (modes 5 and 6)
When the device is woken-up via the IC interface, output amplifier on output MLO is biased
to the VCC/2 voltage. In this configuration an output capacitor, Cout, on the single-ended
output is needed to block the VCC/2 voltage and couples the audio signal to the load.
VCC/2 voltage is present on this output in all modes (modes 1 to 7) to keep the output
capacitor Cout charged and to improve pop performance on this output during the switching
between any given mode to Mode 5 or 6.
When the device is in Mode 5 or 6 where the single-ended output MLO is active, all other
outputs are in a high impedance state.
4.1.3
Phantom ground output configuration (modes 3 and 4)
In a phantom ground output configuration (modes 3 and 4) the internal buffer is connected
to PHG pin and biased to the VCC/2 voltage. Output amplifiers (pins LHP and RHP) are also
biased to the VCC/2 voltage. One end of the load is connected to output amplifier and one to
the PHG buffer. Therefore, no output capacitors are needed. The advantage of the PHG
output configuration is fewer external components compared with a SE configuration.
However, note that in this configuration, the device has higher power dissipation (see
Section 4.3: Power dissipation and efficiency on page 37).
All other inactive outputs are in the high impedance state except for the MLO output, which
is biased to VCC/2 voltage.
To achieve better crosstalk results in this case, each speaker should be connected with
separate PHG wire (2 speakers connected with 4 wires) as shown in
Figure 1 on page 3
(instead of using only one common PHG wire for both speakers, i.e. 2 speakers connected
with 3 wires).
相关PDF资料 |
PDF描述 |
|---|---|
| TS4956EKIJT | 1.06 W, 2 CHANNEL, AUDIO AMPLIFIER, PBGA18 |
| TS4961TIQT | 1.5 W, 1 CHANNEL, AUDIO AMPLIFIER, QCC16 |
| TS4962EIJT | 3 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA9 |
| TS4962EIKJT | 3 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA9 |
| TS4962EKIJT | 3 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA9 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TS4961TIQT | 功能描述:音频放大器 MONO CLASS D AUDIO PWR 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 |
| TS4962 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:2.8W filter-free mono class D audio power amplifier |
| TS4962_07 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:2.8W filter-free mono class D audio power amplifier |
| TS4962_10 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:2.8 W filter-free mono class D audio power amplifier |
| TS4962EIJT | 制造商:STMicroelectronics 功能描述:AUD AMP SPKR 1CH MONO 2W CLS-D 9PIN FLIP-CHIP - Tape and Reel |
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