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參數資料
| 型號： | TS4973IJT |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 1.2 W, 1 CHANNEL, AUDIO AMPLIFIER, BGA9 |
| 封裝： | FCP-9 |
| 文件頁數： | 15/19頁 |
| 文件大小： | 721K |
| 代理商： | TS4973IJT |
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Electrical Characteristics
TS4973
5/19
Remarks:
1. All measurements, except PSRR measurements, are made with a supply bypass capacitor Cs = 1F.
2. The standby response time is about 1s.
THD + N
Total Harmonic Distortion + Noise
Po = 250mW rms, GS = Low (Av = 2)
20Hz < F < 20kHz, RL = 8
0.5
%
PSRR
Power Supply Rejection Ratio1
F = 217Hz, RL = 8
, GS = Low (Av = 2)
Vripple = 200mVpp, Input Grounded, Cin = 220nF, Cb = 1F
53
dB
PSRR
Power Supply Rejection Ratio2
F = 217Hz, RL = 8
, GS = Low (Av = 2)
Vripple = 200mVpp, Input Floating, Cb = 1F
68
dB
Zin
Input Impedance
GS = Low (Av = 2)
37.5
50
62.5
K
Rfeed
Internal Feedback Resistor
37.5
50
62.5
K
VN
Output Voltage Noise F = 20Hz to 20kHz, RL = 8
Unweighted, Vstdby = Gnd
A weighted, Vstdby = Gnd
Unweighted, GS = Low (Av = 2)
A weighted, GS = Low (Av = 2)
Unweighted, GS = High (Av = 10)
A weighted, GS = High (Av = 10)
6
2.5
23
15
56
40
V
RMS
1)
Dynamic measurements - 20*log(rms(Vout)/rms (Vripple)). Vripple is an added sinus signal to Vcc @ F = 217Hz
2)
Dynamic measurements - 20*log(rms(Vout)/rms (Vripple)). Vripple is an added sinus signal to Vcc @ F = 217Hz
Table 6:
Application Components Information
Components
Functional Description
Rin
Inverting input resistor which sets the closed loop gain (when GS = high) in conjunction with the inter-
nal feedback resistor Rfeed. This resistor also forms a high pass filter with Cin1
Fc = 1 / (2 x Pi x Rin x Cin1)
Cin1
Input coupling capacitor which blocks the DC voltage at the amplifier input terminal In1
Cin2
Input coupling capacitor which blocks the DC voltage at the amplifier input terminal In2. This capacitor
also forms a high pass filter with Zin (internal input impedance when Gs = Low
Fc = 1 / (2 x Pi x Zin x Cin2)
Cs
Supply Bypass capacitor which provides power supply filtering (Recommended value = 1F)
Cb
Bypass pin capacitor which provides half supply filtering (Recommended value = 1F)
Av
Closed loop gain in BTL configuration
When Gs = Low, Av = 2 or 6dB
When GS = high, Av = 2 x (Rfeed / Rin). Rfeed value see Electrical Characteristics.
Table 5: Electrical characteristics - VCC = 2.8V, GND = 0V, Tamb = 25°C (unless otherwise
specified)
Symbol
Parameter
Min.
Typ.
Max.
Unit
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