STK433-040N-E

No.A2101-10/11

STK433-000N-E/100N-E 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

R1

(*4)

(*1)

V1

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

(*4) R1 is changed depending on the power-supply voltage(-VCC).

Please set resistance(R1) to become [V1=0V] by the following calculation types.

(*1) Please use restriction resistance as there is no Stand-by

terminal voltage (#13pin) beyond maximun rating (VSTmax).

Stand-by Control

+5V

+5V

MUTE

ST-BY

ST-BY

PLAY

MUTE

Mute Control

GND

Ch1 OUT

0.1

μF

56k

Ω 6.8kΩ

-VCC +VCC Ch1

OUT

Ch1

OUT

Ch2

OUT

Ch2

OUT +PRE

STK433-000N-E/100N-E series

SUB GND Ch1

IN

Ch1

NF ST-BY

Ch2

NF

Ch2

IN

+

+

+

+

+

+

+

+

+

[STK433-000N-E/100N-E series Stand-By Control Example]

[Feature]

• The pop noise which occurs to the time of power supply on/off can be improved substantially by recommendation

Stand-By Control Application.

• Stand-By Control can be done by additionally adjusting the limitation resistance to the voltage such as miccom, the

set design is easy.

(Reference circuit) STK433-000N-E/100N-E 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 +PRE

STK433-000N-E/100N-E

series

SUB/AMP

GND

IC

GND

Ch1

IN

ΔVBE

ΔVBE

IST

Stand-By Circuit

in PreDriver IC

Stand-by Control

H : Operation Mode(+5V)

L : Stand-by Mode(0V)

Switching transistor

in the bias circuit

#13pin Stand-By OFF threshold.

ex)Stand-By Control Voltage VST=+5V

VST is set by the limitation resistance(*1).

.IST=(VST-VBE*2)/((*1)+(*2))

=(5v-0.6v*2)/(4.7k

Ω+2.7kΩ)

=0.513(mA)

.VST=IST 4.7kΩ+VBE=0.513 4.7k+0.6=3.0v

Ch1

NF

ST-

BY

Ch2

NF

Ch2

IN

2.7k

33k

Ω

2k

Ω

(*3)

1k

Ω (*3)

33

μF

(*2)

+

4.7k

VST

[Operation explanation] #13pin Stand-By Control Voltage VST

(1) Operation Mode

The switching transistor in the bias circuit turns on and places the amplifier into the operating mode, when 13pin

(VST) voltage added above 2.5V (typ 3.0V).

(2) Stand-By Mode

When 13pin (VST) voltage is stopped (= 0V), the switching transistor in the bias circuit turn off. placing the

amplifier into the standby mode.

(*1) The current limiting resistor must be used to ensure that stand-by pin (13pin) voltage does not exceed its

maximum rated value VST max.

(*2) The pop noise level when the power is turned on can be reduced by setting the time constant with a capacitor

in operating mode.

(*3) Determines the time constant at which the capacitor (*2) is discharged in stand-by mode.