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参数资料
| 型号： | TPA6020A2RGWRG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 2.15 W, 2 CHANNEL, AUDIO AMPLIFIER, PQCC20 |
| 封装： | 5 X 5 MM, GREEN, PLASTIC, VQFN-20 |
| 文件页数： | 9/27页 |
| 文件大小： | 1948K |
| 代理商： | TPA6020A2RGWRG4 |
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Ca +
1
2p 1k
f
c(LPF)
(11)
V
(rms) +
V
O(PP)
2 2
Power +
V
(rms)
2
R
L
(12)
9 dB
fc(HPF) = 100 Hz
12 dB
AV
+20 dB/dec
40 dB/dec
20 dB/dec
f
fc(LPF) = 10 kHz
RL
2x VO(PP)
VO(PP)
-VO(PP)
VDD
USING LOW-ESR CAPACITORS
DIFFERENTIAL OUTPUT VERSUS
TPA6020A2
SLOS458B – JULY 2005 – REVISED AUGUST 2005
benefits to this configuration is power to the load. The
differential drive to the speaker means that as one
side is slewing up, the other side is slewing down,
and vice versa. This in effect doubles the voltage
Substituting 10 kHz for fc(LPF) and solving for Ca:
swing
on
the
load
as
compared
to
a
Ca = 160 pF
ground-referenced load. Plugging 2X VO(PP) into the
power equation, where voltage is squared, yields 4X
Figure 30 is a bode plot for the band-pass filter in the
the output power from the same supply rail and load
previous example. Figure 29 shows how to configure
impedance Equation 12.
the TPA6020A2 as a band-pass filter.
Figure 30. Bode Plot
Decoupling Capacitor (CS)
The TPA6020A2 is a high-performance CMOS audio
amplifier that requires adequate power supply de-
coupling to ensure the output total harmonic distortion
(THD) is as low as possible. Power-supply decoupling
also prevents oscillations for long lead lengths be-
tween the amplifier and the speaker. For higher
frequency transients, spikes, or digital hash on the
line, a good low equivalent-series-resistance (ESR)
ceramic capacitor, typically 0.1 F to 1 F, placed as
Figure 31. Differential Output Configuration
close as possible to the device VDD lead works best.
For filtering lower frequency noise signals, a 10-F or
In a typical wireless handset operating at 3.6 V,
greater capacitor placed near the audio power ampli-
bridging raises the power into an 8-
speaker from a
fier also helps, but is not required in most applications
singled-ended
(SE,
ground
reference)
limit
of
because of the high PSRR of this device.
200 mW to 800 mW. This is a 6-dB improvement in
sound power—loudness that can be heard. In ad-
dition
to
increased
power,
there
are
fre-
Low-ESR capacitors are recommended throughout
quency-response
concerns.
Consider
the
this applications section. A real (as opposed to ideal)
single-supply SE configuration shown in Figure 32. A
capacitor can be modeled simply as a resistor in
coupling capacitor (CC) is required to block the
series with an ideal capacitor. The voltage drop
dc-offset voltage from the load. This capacitor can be
across this resistor minimizes the beneficial effects of
quite large (approximately 33 F to 1000 F) so it
the capacitor in the circuit. The lower the equivalent
tends to be expensive, heavy, occupy valuable PCB
value of this resistance the more the real capacitor
area, and have the additional drawback of limiting
behaves like an ideal capacitor.
low-frequency performance. This frequency-limiting
effect is due to the high-pass filter network created
with the speaker impedance and the coupling capaci-
SINGLE-ENDED OUTPUT
tance. This is calculated with Equation 13.
Figure 31 shows a Class-AB audio power amplifier
(APA)
in
a
fully
differential
configuration.
The
TPA6020A2 amplifier has differential outputs driving
both ends of the load. One of several potential
17
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TPA6020A2RGWT | 功能描述:音频放大器 Stereo 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 |
| TPA6020A2RGWTG4 | 功能描述:音频放大器 Stereo 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 |
| TPA6021A4 | 制造商:TI 制造商全称:Texas Instruments 功能描述:2-W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL |
| TPA6021A4EVM | 功能描述:音频 IC 开发工具 TPA6021A4 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 |
| TPA6021A4N | 功能描述:音频放大器 Stereo Class-AB w/Ster Hdphn Drive 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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