TS4984

Application Information

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4

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 64, we assign the following variables and values:

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:

The output power is:

For the same power supply voltage, the output power in a BTL configuration is four times higher than the

output power in a single-ended configuration.

Figure 64: Typical application schematic - left channel

Rin = Rin-L

Cin = Cin-L

Input L

GND

Rfeed = Rfeed-L

VCC

Cs

1u

RL

Cfeed = Cfeed-L

AV = -1

Vin-

Vin+

Vout 1

Vout 2

+

-

+

-

VO-L

VO+L

IN-L

IN+L

=

=

=

=

Bias

Bypass

Standby

TS4984

Cb

1u

P

out

2V

outRMS

()

2

R

L

-------------------------------------

=