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参数资料
| 型号： | TPA6203A1DRBR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 1.25 W, 1 CHANNEL, AUDIO AMPLIFIER, PQCC8 |
| 封装： | 3 X 3 MM, GREEN, PLASTIC, SON-8 |
| 文件页数： | 3/29页 |
| 文件大小： | 952K |
| 代理商： | TPA6203A1DRBR |
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Input Capacitor (CI)
Decoupling Capacitor (CS)
fc +
1
2pR
I
C
I
(2)
USING LOW-ESR CAPACITORS
–3 dB
fc
DIFFERENTIAL OUTPUT VERSUS
C
I +
1
2pR
I
fc
(3)
www.ti.com.......................................................................................................................................................... SLOS364F – MARCH 2002 – REVISED JUNE 2008
The TPA6203A1 does not require input coupling
The TPA6203A1 is a high-performance CMOS audio
capacitors if using a differential input source that is
amplifier
that
requires
adequate
power
supply
biased from 0.5 V to VDD - 0.8 V. Use 1% tolerance
decoupling to ensure the output total harmonic
or better gain-setting resistors if not using input
distortion (THD) is as low as possible. Power supply
coupling capacitors.
decoupling also prevents oscillations for long lead
lengths between the amplifier and the speaker. For
In
the
single-ended
input
application
an
input
higher frequency transients, spikes, or digital hash on
capacitor, CI, is required to allow the amplifier to bias
the line, a good low equivalent-series- resistance
the input signal to the proper dc level. In this case, CI
(ESR) ceramic capacitor, typically 0.1
F to 1 F,
and RI form a high-pass filter with the corner
placed as close as possible to the device VDD lead
frequency determined in Equation 2.
works best. For filtering lower frequency noise
signals, a 10-
F or greater capacitor placed near the
audio power amplifier also helps, but is not required
in most applications because of the high PSRR of this
device.
Low-ESR capacitors are recommended throughout
this applications section. A real (as opposed to ideal)
capacitor can be modeled simply as a resistor in
series with an ideal capacitor. The voltage drop
across this resistor minimizes the beneficial effects of
the capacitor in the circuit. The lower the equivalent
value of this resistance the more the real capacitor
behaves like an ideal capacitor.
The value of CI is important to consider as it directly
affects the bass (low frequency) performance of the
SINGLE-ENDED OUTPUT
circuit. Consider the example where RI is 10 k and
Figure 31 shows a Class-AB audio power amplifier
the specification calls for a flat bass response down
(APA)
in
a
fully
differential
configuration.
The
to 100 Hz. Equation 2 is reconfigured as Equation 3.
TPA6203A1 amplifier has differential outputs driving
both ends of the load. There are several potential
benefits to this differential drive configuration, but
initially consider power to the load. The differential
In this example, CI is 0.16 F, so one would likely
drive to the speaker means that as one side is
choose a value in the range of 0.22
F to 0.47 F. A
slewing up, the other side is slewing down, and vice
further consideration for this capacitor is the leakage
versa. This in effect doubles the voltage swing on the
path from the input source through the input network
load as compared to a ground referenced load.
(RI, CI) and the feedback resistor (RF) to the load.
Plugging 2 × VO(PP) into the power equation, where
This leakage current creates a dc offset voltage at the
voltage is squared, yields 4× the output power from
input to the amplifier that reduces useful headroom,
the same supply rail and load impedance (see
especially in high gain applications. For this reason, a
ceramic capacitor is the best choice. When polarized
capacitors are used, the positive side of the capacitor
should face the amplifier input in most applications,
as the dc level there is held at VDD/2, which is likely
higher than the source dc level. It is important to
confirm the capacitor polarity in the application.
Copyright 2002–2008, Texas Instruments Incorporated
11
Product Folder Link(s): TPA6203A1
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相关代理商/技术参数 |
参数描述 |
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| TPA6203A1DRBRG4 | 功能描述:音频放大器 Mono Fully Diff Class-AB 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 |
| TPA6203A1DRBTG4 | 制造商:Texas Instruments 功能描述: |
| TPA6203A1EVM | 功能描述:音频 IC 开发工具 TPA6203A1 Eval Mod RoHS:否 制造商:Texas Instruments 产品:Evaluation Kits 类型:Audio Amplifiers 工具用于评估:TAS5614L 工作电源电压:12 V to 38 V |
| TPA6203A1GQV | 制造商:未知厂家 制造商全称:未知厂家 功能描述:AUDIO AMPLIFIER|SINGLE|CMOS|BGA|8PIN|PLASTIC |
| TPA6203A1GQVR | 功能描述:音频放大器 Mono Fully Diff Class-AB 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 |
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