TS4984FC datasheet(18/30 Pages) STMICROELECTRONICS

Part #	TS4984FC

Description	1.2W Stereo Audio Power Amplifier with Active Low Standby Mode

PDF	30 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

Logo

18 / 30 page

Application Information

TS4984FC

18/30

Application Information

The TS4984 integrates two monolithic power amplifiers with a BTL (Bridge Tied Load) output

type (explained in more detail in

Section 4.1). For this discussion, only the left-channel amplifier

will be referred to.

Referring to the schematic in

Figure 62, we assign the following variables and values:

Vin = Vin1-

Vout1 =VOUT1+

Vout2 =VOUT1-

Rin = Rin1

Rfeed =Rfeed1

Cfeed =Cfeed1

4.1

BTL configuration principle

BTL (Bridge Tied Load) means that each end of the load is connected to two single-ended

output amplifiers. Thus, we have:

Single-ended output 1 = Vout1 =Vout (V),

Single-ended output 2 = Vout2 =-Vout (V), Vout1 -Vout2 =2Vout (V)

Figure 62. Typical application schematic - left channel

Rin = Rin1

Cin = Cin1

IN1

GND

Rfeed = Rfeed1

VCC

Cfeed = Cfeed1

AV = -1

Bias

TS4984

Vin- = VIN1-

Vin+ = VIN1+

STDBY

BYPASS

Vout1 = VOUT1+

Vout2 = VOUT1-

TS4984FC Datasheet(PDF) 18 Page - STMicroelectronics