EUA6205 datasheet(10/13 Pages) EUTECH

Part #	EUA6205

Description	1.25-W Mono Fully Differential Audio Power Amplifier with 1.8V Input Logic Thresholds

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Manufacturer	EUTECH [Eutech Microelectronics Inc]

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10 / 13 page

EUA6205

DS6205 Ver 1.0 Mar. 2007

10

Application Information

Application Schematics

Figure23 through Figure26 show application schematics

for differential and single-ended inputs. Typical values

are shown in Table1.

Table1. Typical Component Value

Component

Value

RI

10kΩ

RF

10kΩ

C(BYPASS)

0.22µF

CS

1µF

CI

0.22µF

Figure 23. Differential Input Application Schematic

Optimized With Input Capacitors

Figure 24. Single-Ended Input Application Schematic

Figure 25. Application Schematic With Summing Two

Differential Inputs

Figure 26. Application Schematic With Summing Two

Single-Ended Inputs

Power Dissipation

Power dissipation is a major concern when designing a

successful amplifier, whether the amplifier is bridged or

single-ended. A direct consequence of the increased

power delivered to the load by a bridge amplifier is an

increase in internal power dissipation. Since the

EUA6205 has two operational amplifiers in one package,

the maximum internal power dissipation is 4 times that of

a single-ended amplifier. The maximum power dissipation

for a given application can be derived from the power

dissipation graphs of from equation1.

--------------------(1)

It is critical that the maximum junction temperature TJMAX

of 150°C is not exceeded. TJMAX can be determine from

the power derating curves by using PDMAX and the PC

board foil area. By adding additional copper foil, the

)

R

/(2π

)

(V

*

4

P

L

DD

DMAX

2

=

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