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PDF TS4872 Data sheet ( Hoja de datos )
| Número de pieza | TS4872 | |
| Descripción | RAIL TO RAIL INPUT/OUTPUT 1W AUDIO POWER AMPLIFIER WITH STANDBY MODE | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de TS4872 (archivo pdf) en la parte inferior de esta página. Total 29 Páginas | ||
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TS4872
RAIL TO RAIL INPUT/OUTPUT
1W AUDIO POWER AMPLIFIER WITH STANDBY MODE
s OPERATING FROM VCC = 2.2V to 5.5V
s RAIL TO RAIL INPUT/OUTPUT
s 1W OUTPUT POWER @ Vcc=5V, THD=1%,
f=1kHz, with 8Ω Load
s ULTRA LOW CONSUMPTION IN STANDBY
MODE (10nA)
s 75dB PSRR @ 217Hz @ 5 & 2.6V
s ULTRA LOW POP & CLICK
s ULTRA LOW DISTORTION (0.05%)
s UNITY GAIN STABLE
s 8 X170µm BUMPS FLIP CHIP PACKAGE
DESCRIPTION
The TS4872 is an Audio Power Amplifier capable
of delivering 1W of continuous RMS Ouput Power
into 8Ω load @ 5V.
This Audio Amplifier is exhibiting 0.1% distortion
level (THD) from a 5V supply for a Pout = 250mW
RMS. An external standby mode control reduces
the supply current to less than 10nA. An internal
shutdown protection is provided.
The TS4872 has been designed for high quality
audio applications such as mobile phones and to
minimize the number of external components.
The unity-gain stable amplifier can be configured
by external gain setting resistors.
APPLICATIONS
s Mobile Phones (Cellular / Cordless)
s PDAs
s Laptop/Notebook computers
s Portable Audio Devices
ORDER CODE
Part
Number
TS4872IJT
Temperature
Range
-40, +85°C
Package
J
q
Marking
YW4872
J = Flip Chip Package - only available in Tape & Reel (JT)
October 2002
PIN CONNECTIONS (Top View)
TS4872IJT - FLIP CHIP
7 65
Vin+ Vcc STDBY
8 Vout1
Vout2 4
Vin GND BYPASS
12
3
TYPICAL APPLICATION SCHEMATIC
Audio
Input
Rin
Cin
Cfeed
Rfeed Vcc
6
1 Vin- -
7 Vin+ +
Vcc
Rstb
3 Bypass
5 Standby
Bias
Cb
2
Cs
Vout1 8
-
Av=-1
+
Vout2 4
RL
8 Ohms
TS4872
1/29
1 page  
TS4872
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
Cs
Cb
Cfeed
Rstb
Gv
Feed back resistor which sets the closed loop gain in conjunction with Rin
Supply Bypass capacitor which provides power supply filtering
Bypass pin capacitor which provides half supply filtering
Low pass filter capacitor allowing to cut the high frequency
(low pass filter cut-off frequency 1 / (2 x Pi x Rfeed x Cfeed))
Pull-up resistor which fixes the right supply level on the standby pin
Closed loop gain in BTL configuration = 2 x (Rfeed / Rin)
REMARKS
1. All measurements, except PSRR measurements, are made with a supply bypass capacitor Cs = 100µF.
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 1µs.
5/29
5 Page 
Fig. 27 : THD + N vs Output Power
10
Rl = 8Ω
Vcc = 5V
Gv = 2
Cb = Cin = 1µF
1 BW < 125kHz
Tamb = 25°C
0.1
20kHz
0.01
1E-3
20Hz
1kHz
0.01
0.1
Output Power (W)
1
Fig. 29 : THD + N vs Output Power
10
Rl = 8Ω, Vcc = 3.3V
Gv = 2
Cb = Cin = 1µF
BW < 125kHz
1 Tamb = 25°C
0.1
20Hz
20kHz
0.01
1E-3
1kHz
0.01
0.1
Output Power (W)
Fig. 31 : THD + N vs Output Power
10
Rl = 8Ω, Vcc = 2.6V
Gv = 2
Cb = Cin = 1µF
1 BW < 125kHz
Tamb = 25°C
0.1
20Hz
20kHz
0.01
1E-3
1kHz
0.01
0.1
Output Power (W)
1
TS4872
Fig. 28 : THD + N vs Output Power
10
Rl = 8Ω
Vcc = 5V
Gv = 10
Cb = Cin = 1µF
1 BW < 125kHz
Tamb = 25°C
20kHz
0.1
0.01
1E-3
20Hz
1kHz
0.01
0.1
Output Power (W)
1
Fig. 30 : THD + N vs Output Power
10
Rl = 8Ω, Vcc = 3.3V
Gv = 10
Cb = Cin = 1µF
1
BW < 125kHz
Tamb = 25°C
20Hz
0.1
20kHz
0.01
1E-3
1kHz
0.01
0.1
Output Power (W)
1
Fig. 32 : THD + N vs Output Power
10
Rl = 8Ω, Vcc = 2.6V
Gv = 10
Cb = Cin = 1µF
1 BW < 125kHz
Tamb = 25°C
20Hz
0.1
0.01
1E-3
20kHz
1kHz
0.01
0.1
Output Power (W)
11/29
11 Page | ||
| Páginas | Total 29 Páginas | |
| PDF Descargar | [ Datasheet TS4872.PDF ] | |
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