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參數(shù)資料
| 型號(hào)： | TDA8547 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 2 x 1 W BTL audio amplifier with output channel switching |
| 中文描述： | 1.2 W, 2 CHANNEL, AUDIO AMPLIFIER, PDIP16 |
| 文件頁(yè)數(shù)： | 9/24頁(yè) |
| 文件大?。?/td> | 240K |
| 代理商： | TDA8547 |
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1997 Oct 07
9
Philips Semiconductors
Preliminary specification
2
×
1 W BTL audio amplifier with output
channel switching
TDA8547
TEST AND APPLICATION INFORMATION
Test conditions
Because the application can be either Bridge-Tied Load
(BTL) or Single-Ended (SE), the curves of each
application are shown separately.
The thermal resistance = 55 K/W for the DIP16; the
maximum sine wave power dissipation for T
amb
= 25
°
C
25
–
55
is:
For T
amb
= 60
°
C the maximum total power dissipation is:
60
–
55
BTL application
T
amb
= 25
°
C if not specially mentioned, V
CC
= 5 V,
f = 1 kHz, R
L
= 8
, G
v
= 20 dB, audio band-pass
22 Hz to 22 kHz.
The BTL application circuit is illustrated in Fig.4.
The quiescent current has been measured without any
load impedance and both channels driven. When one
channel is active the quiescent current will be halved.
The total harmonic distortion as a function of frequency
was measured using a low-pass filter of 80 kHz.
The value of capacitor C3 influences the behaviour of the
SVRR at low frequencies: increasing the value of C3
increases the performance of the SVRR.
The figure of the MODE voltage (V
MODE
) as a function of
the supply voltage shows three areas; operating, mute
and standby. It shows, that the DC-switching levels of the
mute and standby respectively depend on the supply
voltage level. The figure of the SELECT voltage (V
SELECT
)
as a function of the supply voltage shows the voltage
levels for switching the channels in the active, mute or
standby mode.
150
2.3 W
=
150
1.7 W
=
SE application
T
amb
= 25
°
C if not specially mentioned, V
CC
= 7.5 V,
f = 1 kHz, R
L
= 4
, G
v
= 20 dB, audio band-pass
22 Hz to 22 kHz.
The SE application circuit is illustrated in Fig.16.
Increasing the value of electrolytic capacitor C3 will result
in a better channel separation. Because the positive
output is not designed for high output current (2
×
I
o
) at
low load impedance (
≤
16
), the SE application with
output capacitors connected to ground is advised.
The capacitor value of C6/C7 in combination with the load
impedance determines the low frequency behaviour.
The THD as a function of frequency was measured using
a low-pass filter of 80 kHz. The value of capacitor C3
influences the behaviour of the SVRR at low frequencies:
increasing the value of C3 increases the performance of
the SVRR.
General remark
The frequency characteristic can be adapted by
connecting a small capacitor across the feedback
resistor. To improve the immunity to HF radiation in radio
circuit applications, a small capacitor can be connected in
parallel with the feedback resistor (56 k
); this creates a
low-pass filter.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA8547T | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:2 x 1 W BTL audio amplifier with output channel switching |
| TDA8547TS | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:2 x 0.7 W BTL audio amplifier with output channel switching |
| TDA8547TS/N1 | 制造商:NXP Semiconductors 功能描述:AMP AUDIO PWR 1.2W AB 20SSOP 制造商:NXP Semiconductors 功能描述:AMP, AUDIO, PWR, 1.2W, AB, 20SSOP |
| TDA8547TS/N1,112 | 功能描述:音頻放大器 2X.7W BTL 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 |
| TDA8547TS/N1,118 | 功能描述:音頻放大器 2X.7W BTL 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 |
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