參數(shù)資料
型號: TPA6020A2RGWR
廠商: TEXAS INSTRUMENTS INC
元件分類: 音頻/視頻放大
英文描述: 2.15 W, 2 CHANNEL, AUDIO AMPLIFIER, PQCC20
封裝: 5 X 5 MM, GREEN, PLASTIC, VQFN-20
文件頁數(shù): 7/27頁
文件大小: 1948K
代理商: TPA6020A2RGWR
www.ti.com
_
+
RVDD
ROUT+
LOUT+
ROUT-
LOUT-
GND
2, 5, Thermal Pad
LVDD
19
1
4
3
6
7
To Supply
Bias
Circuitry
RIN-
LIN-
RIN+
LIN+
17
13
16
12
15
11
+
-
SHUTDOWN
R
I
R
I
R
a
R
a
C
I
C
F
C
F
C
F
C
F
C
a
C
a
C
a
C
a
C
I
C
I
C
I
R
I
R
a
R
a
RI
14
9
C
(RBYPASS)
C
(LBYPASS)
100 kW
40 kW
(See note A)
Selecting Components
Gain = RF/RI
(1)
TPA6020A2
SLOS458B – JULY 2005 – REVISED AUGUST 2005
A.
C(LBYPASS) and C(RBYPASS) are optional.
Figure 29. Differential Input Application
Schematic With Input Bandpass Filter
Bypass Capacitor (CBYPASS) and Start-Up Time
The internal voltage divider at the BYPASS pin of this
Resistors (RI)
device sets a mid-supply voltage for internal refer-
ences and sets the output common-mode voltage to
The input resistor (RI) can be selected to set the gain
VDD/2. Adding a capacitor filters any noise into this
of the amplifier according to Equation 1.
pin, increasing kSVR. C(BYPASS)also determines the rise
time of VO+ and VO- when the device exits shutdown.
The larger the capacitor, the slower the rise time.
The internal feedback resistors (RF) are trimmed to
40 k
.
Input Capacitor (CI)
Matching input resistors are important to fully differen-
The TPA6020A2 does not require input coupling
tial amplifier applications. Resistor matching has a
capacitors when driven by a differential input source
significant impact on CMRR and PSRR. If the input
biased from 0.5 V to VDD - 0.8 V. Use 1% tolerance
resistor values are poorly matched, then the CMRR
or better gain-setting resistors if not using in-
and PSRR performance is diminished. Therefore,
put-coupling capacitors.
1%-tolerance resistors or better are recommended to
optimize performance.
15
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