3/16

STA550

Figure 1. Connection Diagram between STA550 and STAbp01

ABSOLUTE

VALUE

BLOCK

OUTPUT BRIDGE

PEAK/2

DETECTOR

VOLTAGE

PROTECTION

SOA

DETECTOR

TURN-

ON/OFF

SEQUENCE

THERMAL

PROTECTION

PEAK/2

DETECTOR

COMPRESSOR

COMPRESSOR

∆G

+2

-1

∆G

+

-

V/l

V/l

S1

Ict

Ict

ABSOLUTE

VALUE

BLOCK

+

-

S1

OUTPUT BRIDGE

CD-2

CD+2

STBY/MUTE

PROT.

PROTECTION

CD+

CD-1

OUT1-

OUT1+

CD+1

IN_PRE1

ATT_REL1

TRK_OUT

THRESH

ATT_REL2

IN_PRE2

PWR_INP1

TRK_1

OUT_ PRE1

-VS

GND

+VS

PWR_INP2

D02AU1391

TRK_2

OUT_ PRE2

OUT2-

OUT2+

+2

-1

+

-

+

+

-

-

R

1V

1V

10V

1V

CD+

GATE

10pF

2200pF

680pF

2.67K

10K

4.99K

2K

499K

680pF

OTHER

STA575

TRK-OUT

100K

1K

OUTPUT

GROUND1

SOFT SW RESET

S

1V

10V

2R

R

1V

COMP/3

1V

1V

BUFFER

R17

CURRENT SENSE

COMPARATOR

ONE SHOT

SIGNAL

OPEN DRAIN

OUTPUT

DISCHARGE

(RESET)

TRANSISTOR

FAST ATTACK

CONTROL

ERROR

AMP

COMP

CURRENT_SENSE

V+

POWER SUPPLY1

CLOCK

250Hz

1V

Q

Q

S

Q

R

Q

RESET

CLK

Q

D

Q

RESET

CLK

D

Q

Q

R

S

Q

Q

INTERNAL

CIRCUIT

ON

UVLO: 7V = on

5V = off

SOFT SWITCH

PWM LATCH

VREF

BUFFER OUT

REC_OUT

BUFFER IN

FA IN

1V

10V

DEAD TIME

10V

100pF

GND-AUDIO

GND

OUTPUT

GROUND2

ONE

SHOT

DELAY

POWER_VS2

ONE SHOT

DUTY ACCEL

+10V

EMI BARRIER

OPTIONAL

EMI BARRIER

OPTIONAL

ISENSE

CD+

CD-

6.82K

490

1K

2K

490

PROTECTION

GATE

+25V

1V

1V

R

+10V

+25V

OTHER

STA575

PROTECTION

1000pF

2.55K

2.43K

15K

95K

STABP01

STA575

10

4

3

19

20

8

3

16

25

20

19

18

21

26

23

24

22

11

12

15

2

4

5

6

13

7

10

9

27

14

17

1

18

15

9

8

7

6

11

12

13

14

16

17

2

5