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參數(shù)資料
| 型號： | TPA2013D1RGP |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 2.7-W CONSTANT OUTPUT POWER CLASS-D AUDIO AMPLIFIER WITH INTEGRATED BOOST CONVERTER |
| 中文描述： | 2.7鎢恒定輸出功率D類音頻放大器，具有集成升壓轉(zhuǎn)換器 |
| 文件頁數(shù)： | 14/28頁 |
| 文件大小： | 753K |
| 代理商： | TPA2013D1RGP |
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SETTING THE BOOST VOLTAGE
CC
V
0.5
(R1 + R2)
R1
=
′
è
÷
(1)
INDUCTOR SELECTION
CC
V
I = I
CC
DD
V
0.8
÷
′
′
è
(2)
DD
V
I
D
CC
DD
V
V
L
CC
(V
)
L =
f
boost
′
-
′
′
(3)
TPA2013D1
SLOS520–AUGUST 2007
Use
Equation 1
to determine the value of R1 for a given V
CC
. The maximum recommended value for V
CC
is
5.5 V. The typical value of the V
CC
FB pin is 500 mV. The current through the resistor divider should be about 100
times greater than the current into the V
CC
FB pin, typically 0.01
μ
A. Based on those two values, the
recommended value of R2 is 500 k
. V
CC
must be greater than 3 V and less than or equal to 5.5 V.
SURFACE MOUNT INDUCTORS
Working inductance decreases as inductor current increases. If the drop in working inductance is severe enough,
it may cause the boost converter to become unstable, or cause the TPA2013D1 to reach its current limit at a
lower output power than expected. Inductor vendors specify currents at which inductor values decrease by a
specific percentage. This can vary by 10% to 35%. Inductance is also affected by dc current and temperature.
TPA2013D1 INDUCTOR EQUATIONS
Inductor current rating is determined by the requirements of the load. The inductance is determined by two
factors: the minimum value required for stability and the maximum ripple current permitted in the application.
Use
Equation 2
to determine the required current rating.
Equation 2
shows the approximate relationship between
the average inductor current, I
L
, to the load current, load voltage, and input voltage (I
CC
, V
CC
, and V
DD
,
respectively). Insert I
CC
, V
CC
, and V
DD
into
Equation 2
to solve for I
L
. The inductor must maintain at least 90% of
its initial inductance value at this current.
The minimum working inductance is 2.2
μ
H. A lower value may cause instability.
Ripple current,
Δ
I
L
, is peak-to-peak variation in inductor current. Smaller ripple current reduces core losses in the
inductor as well as the potential for EMI. Use
Equation 3
to determine the value of the inductor, L.
Equation 3
shows the relationship between inductance L, V
DD
, V
CC
, the switching frequency, f
boost
, and
Δ
I
L
. Insert the
maximum acceptable ripple current into
Equation 3
to solve for L.
Δ
I
L
is inversely proportional to L. Minimize
Δ
I
L
as much as is necessary for a specific application. Increase the
inductance to reduce the ripple current. Note that making the inductance too large will prevent the boost
converter from responding to fast load changes properly. Typical inductor values for the TPA2013D1 are 4.7
μ
H
to 6.8
μ
H.
Select an inductor with a small dc resistance, DCR. DCR reduces the output power due to the voltage drop
across the inductor.
14
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Copyright 2007, Texas Instruments Incorporated
Product Folder Link(s):
TPA2013D1
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPA2013D1RGPR | 功能描述:音頻放大器 2.7W Constant Output Pwr Mono Class-D 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 |
| TPA2013D1RGPRG4 | 功能描述:音頻放大器 2.7W Constant Output Pwr Mono Class-D 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 |
| TPA2013D1RGPT | 制造商:Texas Instruments 功能描述:AUD AMP SPKR 1CH MONO 2.7W CLS-D 20QFN - Tape and Reel |
| TPA2013D1YZH | 制造商:TI 制造商全稱:Texas Instruments 功能描述:2.7-W CONSTANT OUTPUT POWER CLASS-D AUDIO AMPLIFIER WITH INTEGRATED BOOST CONVERTER |
| TPA2013D1YZHR | 功能描述:音頻放大器 2.7W OUTPUT PWR MONO CLASS-D AUD 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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