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參數資料
| 型號： | TPA2015D1YZHT |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 1.7 W, 1 CHANNEL, AUDIO AMPLIFIER, BGA16 |
| 封裝： | 1.954 X 1.954 MM, 0.50 MM PITCH, DSBGA-16 |
| 文件頁數： | 14/27頁 |
| 文件大小： | 1016K |
| 代理商： | TPA2015D1YZHT |
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2.2 H
m
2.2 F – 10 F
m
6.8 F – 22 F
m
IN-
IN+
GAIN
ENB
END
GND
VDD
SW PVOUT
PVDD
OUT+
OUT-
TPA2015D1
Differential
Audio Inputs
Connected to Supply
Gain Control
Boost Enable
Class-D Enable
AGC
AGC Control
47 nF
100 W
www.ti.com
SLOS638 – MAY 2010
OPERATION WITH DACS AND CODECS
Large ripple voltages can be present at the output of
ΔΣ DACs and CODECs, just above the audio frequency
(e.g: 80 kHz with a 300 mVPP). This out-of-band noise is due to the noise shaping of the delta-sigma modulator in
the DAC.
Some Class-D amplifiers have higher output noise when used in combination with these DACs and CODECs.
This is because out-of-band noise from the CODEC/DAC mixes with the Class-D switching frequencies in the
audio amplifier input stage.
The TPA2015D1 has a built-in low-pass filter that reduces the out-of-band noise and RF noise, filtering
out-of-band frequencies that could degrade in-band noise performance. This built-in filter also prevents AGC
errors due to out-of-band noise. The TPA2015D1 AGC calculates gain based on input signal amplitude only.
If driving the TPA2015D1 input with 4th-order or higher
ΔΣ DACs or CODECs, add an R-C low pass filter at each
of the audio inputs (IN+ and IN-) of the TPA2015D1 to ensure best performance. The recommended resistor
value is 100
and the capacitor value of 47 nF.
Figure 27. Reducing Out-of-Band DAC Noise with External Input Filter
FILTER FREE OPERATION AND FERRITE BEAD FILTERS
The TPA2015D1 is designed to minimize RF emissions. For more information about RF emissions and filtering
requirements, See SLOA145 for further information.
PACKAGE DIMENSIONS
The TPA2015D1 uses a 16-ball, 0.5 mm pitch WCSP package. The die length (D) and width (E) correspond to
the package mechanical drawing at the end of the datasheet.
Table 4. Package Dimensions
Dimension
D
E
Max
1984 m
Typ
1954 m
Min
1924 m
Copyright 2010, Texas Instruments Incorporated
21
Product Folder Link(s): TPA2015D1
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