參數(shù)資料
型號(hào)： TS4990EIJT
廠商： STMICROELECTRONICS
元件分類： 音頻／視頻放大
英文描述： 1.2 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA9
封裝： LEAD FREE, FCP-9
文件頁(yè)數(shù)： 10/32頁(yè)
文件大小： 714K
代理商： TS4990EIJT
Application information
TS4990
18/32
4
Application information
4.1
BTL configuration principle
The TS4990 is a monolithic power amplifier with a BTL output type. BTL (bridge tied load)
means that each end of the load is connected to two single-ended output amplifiers. Thus,
we have:
Single-ended output 1 = Vout1 = Vout (V)
Single-ended output 2 = Vout2 = -Vout (V)
and Vout1 - Vout2 = 2Vout (V)
The output power is:
For the same power supply voltage, the output power in BTL configuration is four times
higher than the output power in single-ended configuration.
4.2
Gain in a typical application
The typical application schematics are shown in Figure 1 on page 4.
In the flat region (no Cin effect), the output voltage of the first stage is (in Volts):
For the second stage: Vout2 = -Vout1 (V)
The differential output voltage is (in Volts):
The differential gain named gain (Gv) for more convenience is:
Vout2 is in phase with Vin and Vout1 is phased 180° with Vin. This means that the positive
terminal of the loudspeaker should be connected to Vout2 and the negative to Vout1.
4.3
Low and high frequency response
In the low frequency region, Cin starts to have an effect. Cin forms with Rin a high-pass filter
with a -3 dB cut-off frequency. FCL is in Hz.
In the high frequency region, you can limit the bandwidth by adding a capacitor (Cfeed) in
parallel with Rfeed. It forms a low-pass filter with a -3 dB cut-off frequency. FCH is in Hz.
P
out
2V
out
RMS
()
2
R
L
------------------------------
=
V
out1
V
–
in
()
R
feed
R
in
--------------
=
V
out2
V
out1
–
2V
in
R
feed
R
in
--------------
=
G
v
V
out2
V
out1
–
V
in
----------------------------------
2
R
feed
R
in
--------------
==
F
CL
1
2
πR
inCin
------------------------
=
F
CH
1
2
πR
feedCfeed
------------------------------------
=
相關(guān)PDF資料
PDF描述
TS4990IST 1.2 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8
TS4990IQT 1.2 W, 1 CHANNEL, AUDIO AMPLIFIER, DSO8
TS4990IJT 1.2 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA9
TS4990ID 1.2 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8
TS4990IDT 1.2 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TS4990EIKJT 功能描述:音頻放大器 1.2W audio Pwr amp RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
TS4990EKIJT 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:1.2 W audio power amplifier with active low standby mode
TS4990ID 功能描述:音頻放大器 1.2W audio Pwr amp RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
TS4990IDT 功能描述:音頻放大器 1.2W audio Pwr amp RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
TS4990IJT 制造商:ST 功能描述:1W AUDIO POWER AMPLIFIER WITH ACTIVE LOW STANDBY MODE
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