TS4998 Просмотр технического описания (PDF) - STMicroelectronics

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производитель

TS4998

2 x 1W differential input stereo audio amplifier

STMicroelectronics 

TS4998

Typical application schematics

1

Typical application schematics

Figure 1 shows a typical application for the TS4998 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

Rin1

25k

Rin2

25k

U1

TS4998

1 LIN-

2 LIN+

LEFT

Rin3

25k

Rin4

4 RIN-

RI GH T

3 RIN+

25k

14 Bypass

BIAS

GND GND

1uF

Cb

Cs

1uF

Vcc

-

LOUT- 12

+

LOUT+ 11

-

ROUT- 9

+

ROUT+ 10

Left Speaker

8 Ohms

Right Speaker

8 Ohms

STBY

TS4998 - QFN16

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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