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PDF TS4984 Data sheet ( Hoja de datos )
| Número de pieza | TS4984 | |
| Descripción | 2 x 1W Stereo audio power amplifier | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de TS4984 (archivo pdf) en la parte inferior de esta página. Total 29 Páginas | ||
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TS4984www.DataSheet4U.com
2 x 1W Stereo audio power amplifier
with active low standby mode
■ Operating from VCC=2.2V to 5.5V
■ 1W output power per channel @ VCC=5V,
THD+N=1%, RL=8Ω
■ 10nA standby current
■ 62dB PSRR @ 217Hz with grounded inputs
■ High SNR: 100dB(A) typ.
■ Near-zero pop & click
■ Available in QFN16 4x4 mm, 0.5mm pitch,
leadfree package
Description
The TS4984 has been designed for top of the
class stereo audio applications. Thanks to its
compact and power dissipation efficient QFN
package, it suits various 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.
An externally controlled standby mode control
reduces 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.
Pin Connections (top view)
TS4984IQ — TQFN16 4x4mm
IN- L
IN+ L
BYPASS L
NC
VO-L VO+L VCC1 VCC2
16 15 14 13
1
2
3
4
56 7
12
11
10
9
8
STBY
BYPASS R
IN+ R
IN- R
GND1 GND2 VO+R VO-R
Applications
■ Cellular mobile phones
■ Notebook computers & PDAs
Order Codes
Part Number
TS4984IQT
Temperature Range
-40, +85°C
■ LCD monitors & TVs
■ Portable audio devices
Package
QFN
Packaging
Tape & Reel
Marking
K984
January 2005
Revision 1
1/29
1 page  
Electrical characteristics
TS4984
Table 5: Electrical characteristics for VCC = +3.3V, GND = 0V, Tamb = 25°Cw(wunwl.eDsastaoShtheeetr4wU.icsoem
specified)
Symbol
Parameter
Min. Typ. Max. Unit
ICC
Supply Current
No input signal, no load
ISTANDBY
Standby Current 1
No input signal, Vstdby = GND, RL = 8Ω
Voo
Output Offset Voltage
No input signal, RL = 8Ω
Pout
Output Power
THD = 1% Max, F = 1kHz, RL = 8Ω
THD + N
Total Harmonic Distortion + Noise
Po = 400mWrms, Av = 2, 20Hz ≤ F ≤ 20kHz, RL = 8Ω
PSRR
Power Supply Rejection Ratio2
RL = 8Ω, Av = 2, Vripple = 200mVpp, Input Grounded
F = 217Hz
F = 1kHz
Channel Separation, RL = 8Ω
Crosstalk F = 1kHz
F = 20Hz to 20kHz
TWU Wake-Up Time (Cb = 1µF)
TSTDB Standby Time (Cb = 1µF)
VSTDBH Standby Voltage Level High
VSTDBL Standby Voltage Level Low
ΦM
Phase Margin at Unity Gain
RL = 8Ω, CL = 500pF
Gain Margin
GM RL = 8Ω, CL = 500pF
GBP
Gain Bandwidth Product
RL = 8Ω
6.6 12
10 1000
mA
nA
1
300 450
0.1
10
mV
mW
%
55 61
55 63
dB
-94
-68
110 140
10
1.2
0.4
dB
ms
µs
V
V
65 Degrees
15 dB
1.5 MHz
1) Standby mode is activated when Vstdby is tied to Gnd
2) All PSRR data limits are guaranteed by production sampling tests
Dynamic measurements - 20*log(rms(Vout)/rms(Vripple)). Vripple is the sinusoidal signal superimposed upon Vcc.
5/29
5 Page 
Electrical characteristics
Figure 26: Output power vs. power supply
voltage
1.0
0.9 RL = 16Ω
F = 1kHz
0.8 BW < 125kHz
0.7 Tamb = 25°C
0.6
0.5
0.4
0.3
0.2
0.1
0.0
2.5
3.0
THD+N=10%
THD+N=1%
3.5 4.0 4.5 5.0 5.5
Vcc (V)
Figure 27: Output power vs. power supply
voltage
0.60
0.55
0.50
0.45
0.40
RL = 32Ω
F = 1kHz
BW < 125kHz
Tamb = 25°C
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
2.5
3.0
THD+N=10%
THD+N=1%
3.5 4.0 4.5 5.0 5.5
Vcc (V)
Figure 28: Output power vs. load resistor
1.75
1.50
1.25
THD+N=10%
Vcc = 5V
F = 1kHz
BW < 125kHz
Tamb = 25°C
1.00
0.75
0.50
0.25
THD+N=1%
0.00
4
8 12 16 20 24 28 32
Load Resistance (W)
TS4984
Figure 29: Output powwwewr .vDsa.taloShaedert4eUs.icsotmor
0.7
Vcc = 3.3V
0.6 F = 1kHz
THD+N=10%
BW < 125kHz
0.5 Tamb = 25°C
0.4
0.3
0.2
0.1 THD+N=1%
0.0
4
8 12 16 20 24 28 32
Load resistance
Figure 30: Output power vs. load resistor
0.40
0.35
0.30
0.25
THD+N=10%
Vcc = 2.6V
F = 1kHz
BW < 125kHz
Tamb = 25°C
0.20
0.15
0.10
0.05
THD+N=1%
0.00
4
8 12 16 20 24 28 32
Load resistance
Figure 31: Power dissipation vs. output power
Vcc=5V
2.4 F=1kHz
THD+N<1%
2.0
1.6
RL=4Ω
1.2
RL=8Ω
0.8
0.4
0.0
0.0
RL=16Ω
0.2 0.4 0.6 0.8 1.0
Output Power (W)
1.2
11/29
11 Page | ||
| Páginas | Total 29 Páginas | |
| PDF Descargar | [ Datasheet TS4984.PDF ] | |
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