TS4997 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

TS4997

2 x 1W differential input stereo audio amplifier with programmable 3D effects

STMicroelectronics 

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.

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