STK433-730-E Sanyo Semicon Device, STK433-730-E Datasheet - Page 11

• Manufacturer Part Number: STK433-730-E
• Description: 2-channel class AB audio power IC 30W+30W
• Manufacturer: Sanyo Semicon Device

+V CC
STK433-700series Stand-by Control & Mute Control Application
[The example of use STK433-*00series Stand-by control circuit]
Features
• By using the recommended stand-by control application, the pop noise level when the power is turned on/off can be
• By adjusting the limiting resistance (*1) in accordance with the voltages of the microcontroller and other components
Operation Explanation
1) About VST (#13pin Stand-by Threshold)
<1> Operation Mode
<2> Stand-by Mode
(*3) The pop noise that occurs when the power is turned ON is reduced by providing a time constant using a capacitor
(*4) The pop noise level is reduced by discharging the capacitor with a resistor in the stand-by mode.
-V CC
GND
significantly reduced.
used, it is possible to perform stand-by control, facilitating the finished product design effort.
(ex) STK433-*00series test circuit. When impressed by Stand-by control control [+5V].
-PRE
1
When pin 13 reference voltage VST is equal to or greater than 2.5 V, the stand-by circuit is set off, and the
amplifier is set to the operation mode.
When pin 13 reference voltage VST is equal to or less than 0.6V, the stand-by circuit is set off, and the amplifier is
set to the stand-by mode.
during operation.
-V CC
2
+V CC
-PRE
STK433-*00series
3
1
-V CC
OUT
Ch1
2
4
+V CC
3
OUT
Ch1
5
OUT
Ch1
4
OUT
Ch2
6
OUT
Ch1
STK433-700series
5
OUT
Ch2
7
OUT
Ch2
6
+PRE
8
OUT
Ch2
7
SUB/
GND
+PRE
8
9
MONITOR
SUB/
GND MONITOR
Stand-by Circuit
in Pre Driver IC
9
10
10
Ch1
IN
11
STK433-730-E
ΔVBE
Ch1
11
IN
Ch1
NF
12
ST-BY
Ch1
12
NF
ST-BY
13
13
4.3kΩ (*2)
VST
14
Ch2
14
NF
VST
Ch2
MONITOR
Ch2 OUT
GND
GND
Ch1 OUT
NF
Ch2
15
15
IN
Ch2
IN
Stand-by
Control
Mute
Control
1kΩ
1kΩ (*1)
ex) VST=(Stand-by Control-VBE*2)× (*2)/((*1)+(*2))+VBE
=(5V-0.6V*2)×4.3kΩ/(4.3kΩ+1kΩ)+0.6V
≈3.68(V)
ST-BY
+5V
ΔVBE
10kΩ
10kΩ
33μF
33kΩ
10kΩ
2.2kΩ
33μF (min)
(*3)
+5V
33kΩ
MUTE
PLAY
2kΩ
Ch2 IN
GND
Ch1 IN
Mute Control
H: Single Mute
L: Normal
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Stand-by Control(ex)
H: Operation Mode(+5V)
L: Stand-by Mode(0V)
2kΩ
(*4)
Stand-by control circuit part
H: Operation mode (+5V)
L: Stand-by mode (0V)
MUTE
No. A1249-11/12
ST-BY