STK433-330N-E ON Semiconductor, STK433-330N-E Datasheet - Page 10

• Manufacturer Part Number: STK433-330N-E
• Description: stk433 series 3 channel 71.5 v 150 w class ab audio...
• Manufacturer: ON Semiconductor

STK433-300 series Stand-by Control & Mute Control & Load-Short Protection
Application
+V CC
[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
• Stand-By Control can be done by additionally adjusting the limitation resistance (*1) to the voltage such as Micro
(Reference circuit) STK433-300 series test circuit To Stand-By Control added +5V.
[Operation explanation]
1) #13pin Stand-By Control Voltage VST
-V CC
GND
improved.
computer, the set design is easy.
(1) Operation Mode
(2) Stand-By Mode
100μF
/100V
100μF
/100V
-PRE -V CC +V CC Ch1
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
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
1
+
+
STK433-300series
100μF
/100V
2
-PRE
1
+
100Ω
/1W
3
-V CC +V CC Ch1
2
OUT
4
3
56kΩ 6.8kΩ
Load Short Protection
Circuit
Ch1
OUT
OUT
5
4
STK433-300 series
Ch2
OUT
OUT
Ch1
6
5
100Ω/1W
56kΩ 6.8k
100μF
/100V
Ch2
OUT
OUT
Ch2
6
7
+PRE
+
Ω
OUT +PRE
Ch2
7
8
SUB
8
VST
9
SUB.GND
GND
SUB GND Ch1
#13pin Stand-By OFF threshold.
9
10
Bias Circuit
in PreDriver IC
10
Ch1
11
IN
STK433-330N-E
4.7kΩ
4.7kΩ
3μH
3μH
ΔVBE
11
IN
0.1μF
Ch1
68pF
56kΩ
12
NF
3pF
+
Ch1
12
NF ST-BY
ST-
BY
4.7kΩ
3μH
10kΩ
22kΩ
1kΩ
1.8kΩ
10μF
/10V
13
56kΩ
13
56kΩ
3pF
0.1μF
4.7kΩ/1W
4.7kΩ/1W
0.1μF
100kΩ
Ch2
14
NF
+
Ch2
14
NF
4.7kΩ
68pF
1.8kΩ
10μF
/10V
Latch Up
Circuit
Ch2
15
IN
Ch2
15
0.1μF
4.7kΩ/1W
IN
(*2)
Therefore, IST≅0.40mA
Therefore, IST≅0mA
16
Ch3
IN
Ch3
16
IN
68pF
+
Ch3 OUT
Ch2 OUT
GND
GND
GND
Ch1 OUT
Ch3
NF
Ch3
17
17
2.7kΩ
IN
1.8kΩ
10μF
/10V
56kΩ
56kΩ 6.8kΩ
3pF
OUT
IST
Ch3
Ch3
OUT
18
18
(*1)
OUT
Stand-by Control
Ex)IST=(VST-VBE × 2)/((*1)+(*2))
Ch3
19
Ch2
19
=(5v-0.6v × 2)/(4.7kΩ+2.7kΩ)
≅0.52(mA)
Mute Control
Δ VBE
2.2μF
/50V
2.2μF
/50V
(*1) The impression voltage of a Stand-by terminal (#13) is
2.7kΩ
+
+
the maximum rating(VSTmax).Please set up not to exceed.
ST-BY
+5V
1kΩ
1kΩ
+
33μF
(*3)
33kΩ
+
1kΩ
MUTE
33μF
2.2μF
/50V
/10V
33kΩ
+5V
+
1kΩ
PLAY
2kΩ
(*4)
1kΩ
2kΩ
Stand-by Control
H : Operation Mode(+5V)
L : Stand-by Mode(0V)
10kΩ
10kΩ
10kΩ
Stand-by Control(ex)
MUTE
H : Operation Mode(+5V)
L : Stand-by Mode(0V)
2.2kΩ
10kΩ
No.A2107-10/11
ST-BY
Ch3 IN
Ch2 IN
GND
Ch1 IN
Mute Control
H : Single Mute
L : Normal