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參數(shù)資料
| 型號： | TPA2000D1TPWRQ1 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 2 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO16 |
| 封裝： | GREEN, PLASTIC, TSSOP-16 |
| 文件頁數(shù)： | 6/19頁 |
| 文件大?。?/td> | 307K |
| 代理商： | TPA2000D1TPWRQ1 |
Using Low-ESR Capacitors
Switching Frequency
fs +
6.6
ROSC
COSC
(8)
INP
INN
SHUTDOWN
GAIN0
GAIN1
PVDD
OUTP
PGND
BYPASS
AGND
COSC
ROSC
VDD
PVDD
OUTN
PGND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
TPA2000D1
C5
1
F
C6
1
F
C7
1
F
C1
220 pF
R1
120 k
C2
1
F
C3
1
F
C4
1
F
C8
10
F
OUT+
VDD
OUT
Audio Input
VDD
To System
Controller
Audio Input+
Gain Select
VDD
SGLS137E – SEPTEMBER 2002 – REVISED OCTOBER 2008 ........................................................................................................................................ www.ti.com
Low-ESR capacitors are recommended throughout this application 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 switching frequency is determined using the values of the components connected to ROSC (pin 13) and
COSC (pin 14) and are calculated using Equation 8.
The switching frequency was chosen to be centered on 250 kHz. This frequency represents the optimization of
audio fidelity due to oversampling and the maximization of efficiency by minimizing the switching losses of the
amplifier.
The recommended values are a resistance of 120 k
and a capacitance of 220 pF. Using these components
values, the amplifier operates properly by using 5% tolerance resistors and 10% tolerance capacitors. The
tolerance of the components can be changed as long as the switching frequency remains between 200 kHz and
300 kHz. Within this range, the internal circuitry of the device provides stable operation.
Figure 12. Application Circuit
Table 3. TPA2000D1 Evaluation Bill of Materials
REFERENCE
DESCRIPTION
SIZE
QUANTITY
MANUFACTURER
PART NUMBER
Capacitor, ceramic, 220 pF, +10%,
C1
0805
1
Mouser
140-CC501B221K
XICON, 50 V
Capacitor, ceramic, 1
F, +80%/–20%,
C2–C7
0805
6
Murata
GRM40-Y5V105Z16
Y5V, 16 V
Capacitor, ceramic, 10
F,
C8
1210
1
Murata
GRM235-Y5V106Z16
+80%/–20%, Y5V, 16 V
Resistor, chip, 120 k
, 1/10 W, 5%,
R1
0805
1
Mouser
260-120K
XICON
IC, TPA2000D1, audio power amplifier,
24-pin
U1
1
Texas Instruments
TPA2000D1PW
2-W, single channel, class-D
TSSOP
14
Copyright 2002–2008, Texas Instruments Incorporated
Product Folder Link(s): TPA2000D1-Q1
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