TS4985 datasheet(2/29 Pages) STMICROELECTRONICS

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Typical Application Schematic

TS4985

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Typical Application Schematic

Figure 1 shows a typical application schematic for the TS4985.

Table 1.

External component descriptions

Figure 1.

Application schematic

Components

Functional Description

RIN L,R

Inverting input resistors which sets the closed loop gain in

conjunction with Rfeed. These resistors also form a high pass

filter with CIN (fc = 1 / (2 x Pi x RIN x CIN))

CIN L,R

Input coupling capacitors which blocks the DC voltage at the

amplifier input terminal

RFEED L,R

Feedback resistors which sets the closed loop gain in

conjunction with RIN

Supply Bypass capacitor which provides power supply filtering

Bypass pin capacitor which provides half supply filtering

AV L, R

Closed loop gain in BTL configuration = 2 x (RFEED / RIN) on

each channel

VCC

Rin-L

Cin-L

Input L

GND

Rin-R

Cin-R

Input R

GND

Cfeed-L

Rfeed-L

Cfeed-R

Rfeed-R

Neg. Output L

Pos. Output L

Neg. Output R

Pos. Output R

22k

100n

Bias

AV = -1

Bypass

Standby L

AV = -1

VO-L

VO+L

VO-R

VO+R

IN-L

IN+L

IN+R

IN-R

Standby R

TS4985

VCC

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