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TS4990JT Folha de dados(PDF) 4 Page - STMicroelectronics

Nome de Peças TS4990JT
Descrição Electrónicos  1W AUDIO POWER AMPLIFIER WITH ACTIVE LOW STANDBY MODE
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
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TS4990
4/6
ELECTRICAL CHARACTERISTICS
V
CC = 2.6V, GND = 0V, Tamb = 25°C (unless otherwise specified)
REMARKS
1. All measurements, except PSRR measurements, are made with a supply bypass capacitor Cs = 1µF.
2. The standby response time is about 1µs.
Symbol
Parameter
Min.
Typ.
Max.
Unit
ICC
Supply Current
No input signal, no load
4
6
mA
ISTANDBY
Standby Current 1)
No input signal, Vstdby = GND, RL = 8Ω
1. Standby mode is actived when Vstdby is tied to Vcc
10
1000
nA
Voo
Output Offset Voltage
No input signal, RL = 8
520
mV
Po
Output Power
THD = 1% Max, f = 1kHz, RL = 8
210
260
mW
THD + N
Total Harmonic Distortion + Noise
Po = 200mW rms, Gv = 2, 20Hz < f < 20kHz, RL = 8
0.15
%
PSRR
Power Supply Rejection Ratio2)
RL = 8
Ω, Gv = 2, Vripple = 200mVpp, Input Grounded
F = 217Hz
F = 1kHz
2. Dynamic measurements - 20*log(rms(Vout)/rms(Vripple)). Vripple is the surimposed sinus signal to Vcc.
55
55
62
66
dB
TWU
Wake-Up Time
130
TBD
ms
Components
Functional Description
Rin
Inverting input resistor which sets the closed loop gain in conjunction with Rfeed. This resistor also
form 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))
Gv
Closed loop gain in BTL configuration = 2 x (Rfeed / Rin)


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