參數(shù)資料
型號(hào): TPA6030A4
英文描述: 3-W Stereo Audio Power Amplifier with Advanced DC Volume Control
中文描述: 3 - W立體聲音頻功率放大器與先進(jìn)的直流音量控制
文件頁數(shù): 17/33頁
文件大?。?/td> 469K
代理商: TPA6030A4
TPA6011A4
SLOS392
FEBRUARY 2002
17
www.ti.com
APPLICATION INFORMATION
PGND
ROUT
PVDD
RHPIN
RLINEIN
RIN
VDD
LIN
LLINEIN
LHPIN
PVDD
LOUT
1
ROUT+
SE/BTL
HP/LINE
VOLUME
SEDIFF
SEMAX
AGND
BYPASS
FADE
SHUTDOWN
LOUT+
PGND
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
CS
NC
VDD
Ci
Ci
CS
Ci
Ci
CS
Power Supply
Left Negative
Differential Input Signal
Power Supply
VDD
100 k
100 k
CC
In From DAC
or
Potentiometer
(DC Voltage)
C(BYP)
System
Control
CC
Right
Speaker
Left
Speaker
Headphones
1 k
1 k
NC
Left Positive
Differential Input Signal
Right Negative
Differential Input Signal
Right Positive
Differential Input Signal
NOTE A: A 0.1-
μ
F ceramic capacitor should be placed as close as possible to the IC. For filtering lower-frequency noise signals, a larger
electrolytic capacitor of 10
μ
F or greater should be placed near the audio power amplifier.
Figure 28. Typical TPA6011A4 Application Circuit Using Differential Inputs
SE/BTL operation
The ability of the TPA6011A4 to easily switch between BTL and SE modes is one of its most important cost
saving features. This feature eliminates the requirement for an additional headphone amplifier in applications
where internal stereo speakers are driven in BTL mode but external headphone or speakers must be
accommodated. Internal to the TPA6011A4, two separate amplifiers drive OUT+ and OUT
. The SE/BTL input
controls the operation of the follower amplifier that drives LOUT
and ROUT
. When SE/BTL is held low, the
amplifier is on and the TPA6011A4 is in the BTL mode. When SE/BTL is held high, the OUT
amplifiers are in
a high output impedance state, which configures the TPA6011A4 as an SE driver from LOUT+ and ROUT+. I
DD
is reduced by approximately one-third in SE mode. Control of the SE/BTL input can be from a logic-level CMOS
source or, more typically, from a resistor divider network as shown in Figure 29. The trip level for the SE/BTL
input can be found in the
recommended operating conditions
table on page 4.
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