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參數(shù)資料
| 型號(hào)： | TS4604IPT |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 0.065 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO28 |
| 封裝： | 0.65 MM PITCH, ROHS COMPLIANT, TSSOP-28 |
| 文件頁數(shù)： | 10/31頁 |
| 文件大小： | 644K |
| 代理商： | TS4604IPT |
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Application information
TS4604
18/31
Doc ID 17913 Rev 1
6.2
Use of ceramic capacitors
We advise using ceramic capacitors for the decoupling, flying or tank capacitors because of
their low ESR properties. The rated voltage of the ceramic capacitor, however, is an
important parameter to take into consideration.
A 1 F/6.3 V capacitor used at 4.8 V DC typically loses about 40% of its value. In fact, with a
4.8 V power supply voltage, the decoupling value is about 0.6 F instead of 1 F. Because
the decoupling capacitor influences the THD+N in the medium-to-high frequency region, this
capacitor variation becomes decisive. In addition, less decoupling means higher overshoots,
which can be problematic if they reach the power supply's AMR value (5.5 V).
This is why it is recommend to use a 1 F/10 V/X5R or a 2.2 F/6.3 V/X5R, or a new kind of
ceramic capacitor with a low DC bias variation rated at 6.3 V.
If a 1 F/10 V ceramic capacitor is used, at 4.8 V the capacitance will be 0.82 F.
If a 2.2 F/6.3 V ceramic capacitor is used, at 4.8 V the capacitance will be 1.1 F.
6.3
Flying and tank capacitor for the internal negative supply
The TS4604 embeds two independent internal negative supplies as shown in Figure 1.
Each of them requires two capacitors to work properly (a flying and a tank capacitor). The
internal negative supply capacitor must be correctly selected to generate an efficient
negative voltage.
Two flying capacitors (CHP and CLD) of 1 F each with low ESR are recommended for
internal negative power supply operation.
●
CHP between pins 8 and 21.
●
CLD between pins 7 and 22.
Two tank capacitors (CPvss_HP and CPvss_LD) of 1 F each with low ESR are
recommended for internal negative power supply energy storage.
●
CPvss_HP between pin 9 and ground.
●
CPvss_LD between pin 6 and ground.
An X5R dielectric for capacitor tolerance should be used. In order to take into consideration
the
ΔC/ΔV variation of this type of dielectric (see Section 6.2 above), we also recommend:
●
a 10 V DC rating voltage for 4.8 V power supply operation.
●
a 6.3 V DC rating operation for 3.3 V power supply operation.
These capacitors must be placed as close as possible to the TS4604 to minimize parasitic
inductance and resistance that have a negative impact on the audio performance.
6.4
Power supply decoupling capacitor (Cs)
A 1 F decoupling capacitor (Cs) with low ESR is mandatory for the positive power supply
X5R dielectric for capacitor tolerance behavior. In order to take into consideration the
ΔC/ΔV
variation of this type of dielectric (see Section 6.2 above), it is also recommended to use:
●
a 10 V DC rating voltage for 4.8 V power supply operation.
●
a 6.3 V DC rating operation for 3.3 V power supply operation.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TS461 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:OUTPUT RAIL TO RAIL OPERATIONAL AMPLIFIERS |
| TS461_05 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Output Rail-to-Rail Operational Amplifiers |
| TS461C | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:OUTPUT RAIL TO RAIL OPERATIONAL AMPLIFIERS |
| TS461CD | 功能描述:運(yùn)算放大器 - 運(yùn)放 Single Rail-to-Rail RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| TS461CD | 制造商:STMicroelectronics 功能描述:IC OP AMP RRO/P SMD SOIC8 461 |
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