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audio amplifier. TS4997 Datasheet

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audio amplifier. TS4997 Datasheet






TS4997 amplifier. Datasheet pdf. Equivalent




TS4997 amplifier. Datasheet pdf. Equivalent





Part

TS4997

Description

2 x 1W differential input stereo audio amplifier

Manufacture

STMicroelectronics

Datasheet
Download TS4997 Datasheet


STMicroelectronics TS4997

TS4997; www.DataSheet4U.com TS4997 2 x 1W diffe rential input stereo audio amplifier wi th programmable 3D effects Features ■ ■ ■ ■ ■ ■ ■ ■ ■ QFN16 4x4mm Operating range from VCC= 2.7V to 5.5V 1W output power per channel @ V CC=5V, THD+N=1%, RL=8Ω Ultra low stand by consumption: 10nA typ. 80dB PSRR @ 2 17Hz with grounded inputs High SNR: 106 dB(A) typ. Fast startup time: 45ms ty.


STMicroelectronics TS4997

p. Pop&click-free circuit Dedicated stan dby pin per channel Lead-free QFN16 4x4 mm package 3D0 3D1 BYP VCC 16 15 14 Pi n connections (top view) Applications ■ ■ ■ ■ 13 Cellular mobile ph ones Notebook and PDA computers LCD mon itors and TVs Portable audio devices LI NLIN+ RIN+ RIN1 2 3 4 12 LOUT11 LOUT+ 1 0 ROUT+ 9 ROUT- Description The TS4997 is designed for top-class.


STMicroelectronics TS4997

stereo audio applications. Thanks to it s compact and power-dissipation efficie nt QFN16 package with exposed pad, it s uits a variety of applications. With a BTL configuration, this audio power amp lifier is capable of delivering 1W per channel of continuous RMS output power into an 8Ω load @ 5V. 3D effects enhan cement is programmed through a two digi tal input pin inter.



Part

TS4997

Description

2 x 1W differential input stereo audio amplifier

Manufacture

STMicroelectronics

Datasheet
Download TS4997 Datasheet




 TS4997
www.DataSheet4U.com
TS4997
2 x 1W differential input stereo audio amplifier
with programmable 3D effects
Features
Operating range from VCC= 2.7V to 5.5V
1W output power per channel @ VCC=5V,
THD+N=1%, RL=8Ω
Ultra low standby consumption: 10nA typ.
80dB PSRR @ 217Hz with grounded inputs
High SNR: 106dB(A) typ.
Fast startup time: 45ms typ.
Pop&click-free circuit
Dedicated standby pin per channel
Lead-free QFN16 4x4mm package
Applications
Cellular mobile phones
Notebook and PDA computers
LCD monitors and TVs
Portable audio devices
Description
The TS4997 is designed for top-class stereo
audio applications. Thanks to its compact and
power-dissipation efficient QFN16 package with
exposed pad, it suits a variety of 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.
3D effects enhancement is programmed through
a two digital input pin interface that allows more
flexibility on each output audio sound channel.
QFN16 4x4mm
Pin connections (top view)
3D0 3D1 BYP VCC
16 15 14 13
LIN-
LIN+
1
2
RIN+ 3
RIN- 4
12 LOUT-
11 LOUT+
10 ROUT+
9 ROUT-
56 78
GND GND STBYR STBYL
Each output channel (left and right), also has its
own external controlled standby mode pin to
reduce 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.
February 2007
Rev 2
1/34
www.st.com
34





 TS4997
Contents
Contents
TS4997
1 Typical application schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.1 General description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.2 Differential configuration principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.3 Gain in typical application schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.4 Common mode feedback loop limitations . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.5 Low frequency response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.6 3D effect enhancement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.7 Power dissipation and efficiency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.8 Footprint recommendation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4.9 Decoupling of the circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4.10 Standby control and wake-up time tWU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.11 Shutdown time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4.12 Pop performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4.13 Single-ended input configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4.14 Notes on PSRR measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5 QFN16 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
6 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
2/34





 TS4997
TS4997
Typical application schematics
1 Typical application schematics
Figure 1 shows a typical application for the TS4997 with a gain of +6dB set by the input
resistors.
Figure 1. Typical application schematics
VCC
Optional
Diff. input L- Cin1
P1
330nF
Cin2
P2
Diff. input L+ 330nF
Diff. input R- Cin3
P3
330nF
Cin4
P4
Diff. input R+ 330nF
TS4997 - QFN16
Rin1
24k
Rin2
24k
Rin3
24k
Rin4
24k
1 LI N-
2 LI N+
LEFT
4 RIN-
RI GH T
3 RIN+
3D
EFFECT
Bypa ss
14 BIAS
Cs
1uF
Vcc
-
+
-
+
LOUT- 12
LOUT+ 11
ROUT- 9
ROUT+ 10
Left Speaker
8 Ohms
Right Speaker
8 Ohms
STBY
GND GND
1uF
Cb
Table 1. External component descriptions
Components
Functional description
RIN
Input resistors that set the closed loop gain in conjunction with a fixed internal
feedback resistor (Gain = Rfeed/RIN, where Rfeed = 50kΩ).
Input coupling capacitors that block the DC voltage at the amplifier input
CIN
terminal. Thanks to common mode feedback, these input capacitors are
optional. However, if they are added, they form with RIN a 1st order high pass
filter with -3dB cut-off frequency (fcut-off = 1 / (2 x π x RIN x CIN)).
CS Supply bypass capacitors that provides power supply filtering.
CB Bypass pin capacitor that provides half supply filtering.
3/34



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