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PDF TS4962 Data sheet ( Hoja de datos )
| Número de pieza | TS4962 | |
| Descripción | 2.8W filter-free mono class D audio power amplifier | |
| Fabricantes | STMicroelectronics | |
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TS4962
2.8W filter-free mono class D audio power amplifier
Features
■ Operating from VCC=2.4V to 5.5V
■ Standby mode active low
■ Output power: 2.8W into 4Ω and 1.7W into 8Ω
with 10% THD+N max and 5V power supply
■ Output power: 2.2W @5V or 0.7W @ 3.0V into
4Ω with 1% THD+N max.
■ Output power: 1.4W @5V or 0.5W @ 3.0V into
8Ω with 1% THD+N max.
■ Adjustable gain via external resistors
■ Low current consumption 2mA @ 3V
■ Efficiency: 88% typ.
■ Signal to noise ratio: 85dB typ.
■ PSRR: 63dB typ. @217Hz with 6dB gain
■ PWM base frequency: 280kHz
■ Low pop & click noise
■ Thermal shutdown protection
■ Available in DFN8 3X3 mm package
Description
The TS4962 is a differential class-D BTL power
amplifier. It is able to drive up to 2.2W into a 4Ω
load and 1.4W into a 8Ω load at 5V. It achieves
outstanding efficiency (88% typ.) compared to
standard AB-class audio amps.
The gain of the device can be controlled via two
external gain-setting resistors. Pop & click
reduction circuitry provides low on/off switch noise
while allowing the device to start within 5ms. A
standby function (active low) allows the reduction
of current consumption to 10nA typ.
DFN8 3x3 mm
TS4962IQT - Pinout
Applications
■ Cellular phone
■ PDA
■ Notebook PC
January 2007
Rev 7
1/46
www.st.com
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1 page  
TS4962
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Figure 50.
Figure 51.
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Figure 55.
Figure 56.
Figure 57.
Figure 58.
Figure 59.
Figure 60.
Figure 61.
Figure 62.
Figure 63.
Figure 64.
Figure 65.
Figure 66.
Figure 67.
Figure 68.
Figure 69.
Figure 70.
Figure 71.
Gain vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Gain vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Gain vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Gain vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Gain vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Startup & shutdown time VCC = 5V, G = 6dB, Cin= 1µF (5ms/div) . . . . . . . . . . . . . . . . . . . 30
Startup & shutdown time VCC = 3V, G = 6dB, Cin= 1µF (5ms/div) . . . . . . . . . . . . . . . . . . . 30
Startup & shutdown time VCC = 5V, G = 6dB, Cin= 100nF (5ms/div) . . . . . . . . . . . . . . . . . 30
Startup & shutdown time VCC = 3V, G = 6dB, Cin= 100nF (5ms/div) . . . . . . . . . . . . . . . . . 31
Startup & shutdown time VCC = 5V, G = 6dB, No Cin (5ms/div) . . . . . . . . . . . . . . . . . . . . . 31
Startup & shutdown time VCC = 3V, G = 6dB, No Cin (5ms/div) . . . . . . . . . . . . . . . . . . . . . 31
Single-ended input typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Typical application schematic with multiple single-ended inputs . . . . . . . . . . . . . . . . . . . . 35
Method for shorting pertubations to ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Typical application schematic with dual differential inputs . . . . . . . . . . . . . . . . . . . . . . . . . 37
Typical application schematic with one differential input plus one single-ended input . . . . 38
Schematic diagram of mono class D demoboard for the TS4962 DFN package . . . . . . . . 39
Top view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Bottom layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Top layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Recommended footprint for TS4962 DFN package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
DFN8 3x3 exposed pad package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
3/46
5 Page 
TS4962
Electricwawl cwh.DaaratacStheereist4tUic.csom
Table 6.
Symbol
Electrical characteristics at VCC = +4.2V with GND = 0V, Vicm = 2.1V, and
Tamb = 25°C (unless otherwise specified)(1)
Parameter
Min. Typ. Max. Unit
ICC
ISTBY
Voo
Pout
Supply current
No input signal, no load
Standby current (2)
No input signal, VSTBY = GND
Output offset voltage
No input signal, RL = 8Ω
Output power, G=6dB
THD = 1% Max, f = 1kHz, RL = 4Ω
THD = 10% Max, f = 1kHz, RL = 4Ω
THD = 1% Max, f = 1kHz, RL = 8Ω
THD = 10% Max, f = 1kHz, RL = 8Ω
2.1 3
mA
10 1000 nA
3 25 mV
1.5
1.95 W
0.9
1.1
THD + N
Total harmonic distortion + noise
Pout = 600 mWRMS, G = 6dB, 20Hz < f < 20kHz
RL = 8Ω + 15µH, BW < 30kHz
Pout = 700mWRMS, G = 6dB, f = 1kHz
RL = 8Ω + 15µH, BW < 30kHz
Efficiency
Efficiency
Pout = 1.45 WRMS, RL = 4Ω +≥ 15µH
Pout = 0.9 WRMS, RL = 8Ω+≥ 15µH
Power supply rejection ratio with inputs grounded (3)
PSRR
f = 217Hz, RL = 8Ω, G=6dB, Vripple = 200mVpp
Common mode rejection ratio
CMRR
f = 217Hz, RL = 8Ω, G = 6dB, ΔVic = 200mVpp
Gain Gain value (Rin in kΩ)
-2---7---3----k---Ω---
Rin
2
0.35
78
88
63
57
3----0---0----k---Ω---
Rin
3----2---7----k---Ω---
Rin
%
%
dB
dB
V/V
RSTBY
FPWM
SNR
tWU
tSTBY
Internal resistance from standby to GND
Pulse width modulator base frequency
Signal to noise ratio (A-weighting)
Pout = 0.8W, RL = 8Ω
Wake-up time
Standby time
273 300 327
200 280 360
85
5 10
5 10
kΩ
kHz
dB
ms
ms
11/46
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet TS4962.PDF ] | |
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