STA550 查看數據表（PDF） - STMicroelectronics

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STA550

70+70W STEREO BASH POWER AMPLIFIER

STMicroelectronics 

STA550

70+70W STEREO

POWER AMPLIFIER

s MONOCHIP BRIDGE STEREO AMPLIFIER

FOR BASH® ARCHITECTURE

s 55+55W OUTPUT POWER @ RL = 4/8 Ω,

THD = 0.5%

s 70+70W OUTPUT POWER @ RL = 4/8 Ω,

THD = 10%

s HIGH DYNAMIC PREAMPLIFIER INPUT

STAGES

s EXTERNAL PROGRAMMABLE FEEDBACK

TYPE COMPRESSORS

s AC COUPLED INPUT TO CLASS AB BRIDGE

OUTPUT AMPLIFIER

s PRECISION RECTIFIERS TO DRIVE THE

DIGITAL CONVERTER

s ON-OFF SEQUENCE/ TIMER WITH MUTE

AND STANDBY

s PROPORTIONAL OVER POWER OUTPUT

CURRENT TO LIMIT THE DIGITAL

CONVERTER

s ABSOLUTE POWER BRIDGE OUTPUT

FLEXIWATT27

TRANSISTOR POWER PROTECTION

s ABSOLUTE OUTPUT CURRENT LIMIT

s INTEGRATED THERMAL PROTECTION

s POWER SUPPLY OVER VOLTAGE

PROTECTION

s FLEXIWATT POWER PACKAGE WITH 27 PIN

s BASH® LICENCE REQUIRED

DESCRIPTION

The STA550 is a fully integrated power module de-

signed to implement a BASH® amplifier when used

in conjunction with STABP01 digital processor.

BLOCK DIAGRAM

+VS GND -VS

OUT_ PRE1 TRK_1 PWR_INP1

IN_PRE1

ATT_REL1

TRK_OUT

THRESH

ATT_REL2

IN_PRE2

+

-

∆G

COMPRESSOR

V/l

S1

PEAK/2

DETECTOR

Ict

Ict

S1

PEAK/2

DETECTOR

V/l

COMPRESSOR

∆G

-

+

ABSOLUTE

VALUE

BLOCK

+2

-1

OUTPUT BRIDGE

VOLTAGE

PROTECTION

SOA

DETECTOR

THERMAL

PROTECTION

TURN-

ON/OFF

SEQUENCE

ABSOLUTE

VALUE

BLOCK

+2

-1

OUTPUT BRIDGE

CD+1

OUT1+

OUT1-

CD-1

CD+

PROT.

STBY/MUTE

CD+2

OUT2+

OUT2-

CD-2

July 2003

OUT_ PRE2 TRK_2 PWR_INP2

D01AU1263

1/16

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