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零件编号 | TS4997 | ||
描述 | 2 x 1W differential input stereo audio amplifier | ||
制造商 | STMicroelectronics | ||
LOGO | |||
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TS4997
2 x 1W differential input stereo audio amplifier
with programmable 3D effects
Features
■ Operating range from VCC= 2.7V to 5.5V
■ 1W output power per channel @ VCC=5V,
THD+N=1%, RL=8Ω
■ Ultra low standby consumption: 10nA typ.
■ 80dB PSRR @ 217Hz with grounded inputs
■ High SNR: 106dB(A) typ.
■ Fast startup time: 45ms typ.
■ Pop&click-free circuit
■ Dedicated standby pin per channel
■ Lead-free QFN16 4x4mm package
Applications
■ Cellular mobile phones
■ Notebook and PDA computers
■ LCD monitors and TVs
■ Portable audio devices
Description
The TS4997 is designed for top-class stereo
audio applications. Thanks to its compact and
power-dissipation efficient QFN16 package with
exposed pad, it suits a variety of applications.
With a BTL configuration, this audio power
amplifier is capable of delivering 1W per channel
of continuous RMS output power into an 8Ω load
@ 5V.
3D effects enhancement is programmed through
a two digital input pin interface that allows more
flexibility on each output audio sound channel.
QFN16 4x4mm
Pin connections (top view)
3D0 3D1 BYP VCC
16 15 14 13
LIN-
LIN+
1
2
RIN+ 3
RIN- 4
12 LOUT-
11 LOUT+
10 ROUT+
9 ROUT-
56 78
GND GND STBYR STBYL
Each output channel (left and right), also has its
own external controlled standby mode pin to
reduce the supply current to less than 10nA per
channel. The device also features an internal
thermal shutdown protection.
The gain of each channel can be configured by
external gain setting resistors.
February 2007
Rev 2
1/34
www.st.com
34
Electrical characteristics
TS4997
Table 7.
Index of graphics
Description
THD+N vs. output power
THD+N vs. frequency
PSRR vs. frequency
PSRR vs. common mode input voltage
CMRR vs. frequency
CMRR vs. common mode input voltage
Crosstalk vs. frequency
SNR vs. power supply voltage
Differential DC output voltage vs. common mode input
voltage
Current consumption vs. power supply voltage
Current consumption vs. standby voltage
Standby current vs. power supply voltage
Frequency response
Output power vs. load resistance
Output power vs. power supply voltage
Power dissipation vs. output power
Power derating curves
Figure
Figure 2 to 13
Figure 14 to 19
Figure 20 to 28
Figure 29
Figure 30 to 35
Figure 36
Figure 37 to 39
Figure 40 to 45
Figure 46 to 48
Figure 49
Figure 50 to 52
Figure 53
Figure 54 to 56
Figure 57
Figure 58 to 59
Figure 60 to 62
Figure 63
Page
page 9 to page 10
page 11
page 12 to page 13
page 13
page 13 to page 14
page 14
page 14 to page 15
page 15 to page 16
page 16
page 16
page 17
page 17
page 17 to page 18
page 18
page 18
page 18 to page 19
page 19
8/34
Electrical characteristics
TS4997
Figure 44. SNR vs. power supply voltage
Figure 45. SNR vs. power supply voltage
110
108
106 3D OFF
104
102
100
98 3D LOW
96
94
92
90
88
86 3D HIGH
84
82
80
2.5
3.0
3D MEDIUM
Unweighted filter (20Hz to 20kHz)
F = 1kHz
G = +6dB, RL = 8Ω
THD + N < 0.5%
Tamb = 25°C
3.5 4.0 4.5 5.0 5.5
Supply Voltage (V)
110
108
106 3D OFF
104
102
100 3D LOW
98
96
94
92
90
88 3D HIGH
86
84
82
80
2.5
3.0
3D MEDIUM
Unweighted filter (20Hz to 20kHz)
F = 1kHz
G = +6dB, RL = 16Ω
THD + N < 0.5%
Tamb = 25°C
3.5 4.0 4.5 5.0 5.5
Supply Voltage (V)
Figure 46. Differential DC output voltage vs. Figure 47. Differential DC output voltage vs.
common mode input voltage
common mode input voltage
1000 Vcc = 5V
G = +6dB
100 Tamb = 25°C
10 3D HIGH
1
3D MEDIUM
3D LOW
0.1
0.01
3D OFF
1E-3
0
1234
Common Mode Input Voltage (V)
1000 Vcc = 3.3V
G = +6dB
100 Tamb = 25°C
10 3D HIGH
1
3D MEDIUM
3D LOW
0.1
0.01
3D OFF
1E-3
5 0.0 0.5 1.0 1.5 2.0 2.5 3.0
Common Mode Input Voltage (V)
Figure 48. Differential DC output voltage vs.
common mode input voltage
1000 Vcc = 2.7V
G = +6dB
100 Tamb = 25°C
10 3D HIGH
1
3D MEDIUM
3D LOW
0.1
0.01
3D OFF
1E-3
0.0
0.5 1.0 1.5 2.0
Common Mode Input Voltage (V)
2.5
Figure 49. Current consumption vs. power
supply voltage
8
No load
7 Tamb = 25°C
6
5 Both channels active
4
3
2 One channel active
1
0
012345
Power Supply Voltage (V)
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页数 | 30 页 | ||
下载 | [ TS4997.PDF 数据手册 ] |
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