PT2305-HT datasheet(9/27 Pages) PTC

9 / 27 page

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PT2305 V1.1

- 9 -

May, 2005

2.5W × 2 Class AB Audio Power Amplifier

PT2305

ELECTRICAL CHARACTERISTICS

(Unless otherwise, Vcc=5V, bandwidth=22 ~ 22KHz)

Parameter

Symbol

Conditions

Min.

Typ.

Max. Unit

Supply voltage

VDD

2.7

Vin=0V

Operating current

Vshutdown=VDD

0.7

2.0

µA

Two channels gain error

Gerr

RIN=RF=20KΩ

±1

Po=1W, RL=8Ω

0.3

THD+N

THD

Po=340mW, RL=32Ω

THD=1%, RL=3Ω

2.2

THD=1%, RL=4Ω

THD=10%, RL=4Ω

2.5

THD=1%, RL=8Ω

1.0

1.1

Power output

THD=10%, RL=8Ω

1.5

Signal-to-noise ratio

SNR

Pout=1.1W, RL=8Ω,

A-Weighted

Residual noise

Vno

A-Weighted

µV

Output offset

Voff

Vin=0V, +OUT ~ -OUT

±50

Channel separation

F=1KHz

Power supply

rejection ratio

PSRR

CB=1.0

µF, f=120Hz

VRIPPLE=200mVrms: RL= 8Ω

DC Vol=5V

F=1KHz

-0.75

+0.75

Volume control range

Vatt

DC Vol=0V

-75

-78

Volume setup step

Gstep

Vatt=0 ~ -51dB

Mute

mute

DC Vol=0V

-78

Overheat close

150

TSSOP

Back to work

105

Overheat close

135

Temperature protect

SOP

Back to work

105

℃

Shutdown on

Shutdown voltage

VSD

Shutdown off

0.5

0.6

0.2

0.3

VDD

Mute on

Mute voltage

VMT

Mute off

0.5

0.6

0.2

0.3

VDD

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