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參數資料
| 型號： | TPA6021A4NE4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻控制 |
| 英文描述： | 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDIP20 |
| 封裝： | ROHS COMPLIANT, PLASTIC, MS001-AD, DIP-20 |
| 文件頁數： | 4/25頁 |
| 文件大小： | 1823K |
| 代理商： | TPA6021A4NE4 |
www.ti.com
PGND
ROUT-
PVDD
RIN+
RIN-
VDD
LIN-
LIN+
PVDD
LOUT-
1
ROUT+
SE/BTL
VOLUME
AGND
NC
BYPASS
FADE
SHUTDOWN
LOUT+
PGND
2
3
4
5
6
7
8
9
10
11
12
14
15
16
17
13
18
19
20
Ci
VDD
Right Positive
Differential Input Signal
Left Negative
Differential Input Signal
Right Negative
Differential Input Signal
Left Positive
Differential Input Signal
Ci
C
i
Power Supply
VDD
100 kW
C
330 F
O
m
C
330 F
O
m
0.47 F
m
0.47 F
m
0.47 F
m
0.47 F
m
0.47 F
m
0.47 F
m
0.47 F
m
C
10 F
S
m
C
0.47 F
(BYP)
m
In From DAC
or
Potentiometer
(DC Voltage)
System
Control
Right
Speaker
Left
Speaker
Headphones
1 kW
SE/BTL OPERATION
TPA6021A4
SLOS465 – JUNE 2005
APPLICATION INFORMATION (continued)
A.
A 0.47-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 F or greater should be placed near the audio power amplifier.
Figure 20. Typical TPA6021A4 Application Circuit Using Differential Inputs
The ability of the TPA6021A4 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 TPA6021A4, 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 TPA6021A4 is in the BTL mode. When SE/BTL is held high, the OUT– amplifiers are in a
high output impedance state, which configures the TPA6021A4 as an SE driver from LOUT+ and ROUT+. IDD 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 21. The trip level for the SE/BTL
input can be found in the recommended operating conditions table.
12
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| TPA6030A4PWPG4 | 功能描述:音頻放大器 Wide Supply Voltage Low Power Class-AB RoHS:否 制造商:STMicroelectronics 產品: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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
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