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STA505

February 2006

1FEATURES

DISTORTION

OUTPUT STAGE

2

DESCRIPTION

STA505 is a monolithic quad half bridge stage in Mul-

tipower BCD Technology. The device can be used as

dual bridge or reconfigured, by connecting CONFIG

pin to Vdd pin, as single bridge with double current

capability, and as half bridge (Binary mode) with half

current capability.

The device is particularly designed to make the out-

put stage of a stereo All-Digital High Efficiency

(DDX™) amplifier capable to deliver 50 + 50W @

Ω load and

Ω load in single

BTL configuration. The input pins have threshold pro-

40V 3.5A QUAD POWER HALF BRIDGE

Figure 2. Audio Application Circuit (Dual BTL)Pin Description

L18 22

µH

L19 22

µH

C30

1

µF

C20

100nF

C99

100nF

C101

100nF

C107

100nF

C106

100nF

C23

470nF

C55

1000

µF

C21

100nF

C58

100nF

C58

100nF

R57

10K

R59

10K

R63

20

R98

6

R100

6

C53

100nF

C60

100nF

C31

1

µF

C52

330pF

R104

20

C109

330pF

15

M3

IN1A

IN1A

CONFIG

PWRDN

PWRDN

FAULT

TRI-STATE

TH_WAR

TH_WAR

+3.3V

IN1B

GND-Reg

GND-Clean

IN2A

IN1B

IN2A

IN2B

PROTECTIONS

&

LOGIC

REGULATORS

29

23

24

25

27

26

28

30

21

22

33

34

35

36

M2

M5

M4

17

16

OUT1A

GND1A

OUT1A

14

12

10

11

OUT1B

GND1B

OUT1B

13

L113 22

µH

L112 22

µH

C32

1

µF

C108

470nF

C33

1

µF

7

M17

M15

M16

M14

8

9

OUT2A

GND2A

OUT2A

6

4

2

3

OUT2B

GND2B

D00AU1148B

OUT2B

5

19

31

20

GNDSUB

1

IN2B

32

C110

100nF

C111

100nF

R103

6

R102

6

8

Ω

8

Ω

Rev. 11

Figure 1. Package

Table 1. Order Codes

Part Number

Package

STA505

PowerSO36

STA50513TR

in Tape & Reel

PowerSO36