STK433-330N-E

No.A2107-10/11

STK433-300 series Stand-by Control & Mute Control & Load-Short Protection

Application

12

13

14

15

11

10

9

8

7

6

5

4

3

2

1

-PRE

56k

Ω 6.8kΩ

22k

Ω

56k

Ω

10k

Ω

10k

Ω

10k

Ω

2.2k

Ω

1k

Ω

10k

Ω

2.7k

Ω

33k

Ω

2k

Ω

1k

Ω

33

μF

/10V

Latch Up

Circuit

Mute Control

H : Single Mute

L : Normal

Stand-by Control(ex)

H : Operation Mode(+5V)

L : Stand-by Mode(0V)

Ch2 OUT

Ch1 IN

GND

Ch2 IN

GND

GND

+VCC

Load Short Protection

Circuit

-VCC

(*1) The impression voltage of a Stand-by terminal (#13) is

the maximum rating(VSTmax).Please set up not to exceed.

Stand-by Control

+5V

+5V

MUTE

ST-BY

ST-BY

PLAY

MUTE

Mute Control

GND

Ch1 OUT

SUB.GND

0.1

μF

56k

Ω 6.8k

56k

Ω

68pF

3pF

56k

Ω

1k

Ω

1k

Ω

4.7k

Ω

4.7k

Ω/1W

100k

Ω

1.8k

Ω

1.8k

Ω

3pF

100

μF

/100V

100

μF

/100V

100

μF

/100V

100

μF

/100V

0.1

μF

4.7k

Ω/1W

0.1

μF

4.7k

Ω/1W

0.1

μF

3

μH

4.7k

Ω

3

μH

4.7k

Ω

3

μH

10

μF

/10V

10

μF

/10V

100

Ω

/1W

100

Ω/1W

Ω

-VCC +VCC Ch1

OUT

Ch1

OUT

Ch2

OUT

Ch2

OUT +PRE

STK433-300 series

SUB GND Ch1

IN

Ch1

NF ST-BY

Ch2

NF

Ch2

IN

16

17

18

19

Ch3

IN

Ch3

OUT

Ch3

OUT

Ch3

IN

+

+

+

+

+

+

GND

Ch3 OUT

1.8k

Ω

10

μF

/10V

2.2

μF

/50V

2.2

μF

/50V

2.2

μF

/50V

+

56k

Ω

1k

Ω

3pF

+

Ch3 IN

+

+

+

10k

Ω

68pF

68pF

56k

Ω 6.8kΩ

[STK433-300 series Stand-By Control Example]

[Feature]

• The pop noise generated when power supply ON/OFF by using recommendation Stand-By Control Application can be

improved.

• Stand-By Control can be done by additionally adjusting the limitation resistance (*1) to the voltage such as Micro

computer, the set design is easy.

(Reference circuit) STK433-300 series test circuit To Stand-By Control added +5V.

12

13

14

15

11

10

9

8

7

6

5

4

3

2

1

-PRE -VCC +VCC

Ch1

OUT

Ch1

OUT

Ch2

OUT

Ch2

OUT

18

17

16

19

Ch3

IN

Ch3

NF

Ch3

Ch2

OUT

+PRE

STK433-300series

SUB

GND

Ch1

IN

ΔVBE

Δ VBE

IST

Bias Circuit

in PreDriver IC

Stand-by Control

H : Operation Mode(+5V)

L : Stand-by Mode(0V)

Ch1

NF

ST-

BY

Ch2

NF

Ch2

IN

2.7k

33k

Ω

2k

Ω

(*4)

1k

Ω

33

μF

(*3)

+

4.7k

Ex)IST=(VST-VBE

× 2)/((*1)+(*2))

=(5v-0.6v

× 2)/(4.7kΩ+2.7kΩ)

≅0.52(mA)

#13pin Stand-By OFF threshold.

VST

[Operation explanation]

1) #13pin Stand-By Control Voltage VST

(1) Operation Mode

SW transistor of Stand-By Circuit is turned on when VST

≥ 2.5V or more is impressed, and the power amplifier

works.

ex) VST = 2.5V

VST = (*2)

× IST+0.6V → 2.5V = 4.7kΩ × IST+0.6V

Therefore, IST

≅0.40mA

(2) Stand-By Mode

VST

≤ 0.6V or less turns off the SW transistor of Stand-By Circuit by (typ 0V), and the amplifier stops.

ex) VST = 0.6V

VST = (*2)

× IST+0.6V → 0.6V = 4.7kΩ × IST+0.6V

Therefore, IST

≅0mA