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參數資料
| 型號： | TS4972EIJT |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 1.2 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA8 |
| 封裝： | LEAD FREE, FLIP CHIP, 8 PIN |
| 文件頁數： | 26/30頁 |
| 文件大小： | 810K |
| 代理商： | TS4972EIJT |
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Electrical Characteristics
TS4972
5/30
Table 6: Components description
Remarks:
1. All measurements, except PSRR measurements, are made with a supply bypass capacitor Cs =
100F.
2. External resistors are not needed for having better stability when supply @ Vcc down to 3V. By the
way, the quiescent current remains the same.
3. The standby response time is about 1s.
Table 5: VCC = 2.6V, GND = 0V, Tamb = 25°C (unless otherwise specified)
Symbol
Parameter
Min.
Typ.
Max.
Unit
I
CC
Supply Current
No input signal, no load
5.5
8
mA
ISTANDBY
Standby Current 1
No input signal, Vstdby = Vcc, RL = 8
10
1000
nA
Voo
Output Offset Voltage
No input signal, RL = 8
520
mV
Po
Output Power
THD = 1% Max, f = 1kHz, RL = 8
300
mW
THD + N
Total Harmonic Distortion + Noise
Po = 200mW rms, Gv = 2, 20Hz < f < 20kHz, RL = 8
0.1
%
PSRR
Power Supply Rejection Ratio2
f = 217Hz, RL = 8
, RFeed = 22K, Vripple = 200mV rms
75
dB
Φ
M
Phase Margin at Unity Gain
RL = 8, CL = 500pF
70
Degrees
GM
Gain Margin
RL = 8, CL = 500pF
20
dB
GBP
Gain Bandwidth Product
RL = 8
2MHz
1)
Standby mode is actived when Vstdby is tied to Vcc
2)
Dynamic measurements - 20*log(rms(Vout)/rms(Vripple)). Vripple is an added sinus signal to Vcc @ f = 217Hz
Components
Functional Description
Rin
Inverting input resistor which sets the closed loop gain in conjunction with Rfeed. This resistor also
forms a high pass filter with Cin (fc = 1 / (2 x Pi x Rin x Cin))
Cin
Input coupling capacitor which blocks the DC voltage at the amplifier input terminal
Rfeed
Feed back resistor which sets the closed loop gain in conjunction with Rin
Cs
Supply Bypass capacitor which provides power supply filtering
Cb
Bypass pin capacitor which provides half supply filtering
Cfeed
Low pass filter capacitor allowing to cut the high frequency
(low pass filter cut-off frequency 1 / (2 x Pi x Rfeed x Cfeed))
Rstb
Pull-up resistor which fixes the right supply level on the standby pin
Gv
Closed loop gain in BTL configuration = 2 x (Rfeed / Rin)
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相關代理商/技術參數 |
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| TS4972EIJT1 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:1.2W Audio Power Amplifier with Standby Mode Active High |
| TS4972IJT | 制造商:STMicroelectronics 功能描述: |
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| TS4973EIJT | 功能描述:音頻放大器 1.2W 2 audio inputs 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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