stk433-290-e Sanyo Semiconductor Corporation, stk433-290-e Datasheet - Page 11

• Manufacturer Part Number: stk433-290-e
• Description: Thick-film Hybrid 3-channel Class Audio Power 3-channel Class Audio Power
• Manufacturer: Sanyo Semiconductor Corporation

+V CC
GND
-V CC
STK433-300-E series Stand-by control, Mute control, Load-short protection & DC
offset protection application
STK433-300-E Application Explanation
The protection circuit application for the STK433-300-Esr consists of the following blocks (blocks (1) to (4)).
(1) Standby control circuit block
(2) Load short-circuit detection block
(3) Latch-up circuit block
(4) DC voltage protection block
(2) Load short
-PRE
1
-PRE
detection part
STK433-300-E series
1
-V CC
2
-V CC
2
56kΩ
+V CC
3
+V CC
Tr1
3
6.8kΩ
Load short
protection
circuit
56kΩ
OUT(+)
Ch1 OUT
OUT(+)
Ch1
4
Point.B
Ch1
4
6.8kΩ
OUT(-)
Ch1
Point.C
5
OUT(-)
56kΩ
Ch1
5
OUT(+)
56kΩ
Tr2
Ch2
6
OUT(+)
6.8kΩ
Ch2
6
6.8kΩ
Ch2 OUT
OUT(-)
Ch2
7
OUT(-)
Ch2
STK433-300-E series
7
+PRE
8
+PRE
8
I2
SUB
Stand-By Circuit
in PreDriver IC
9
SUB
9
10
GND
GND
10
82kΩ
82kΩ
0.1μF
Ch3 OUT
GND
Ch2 OUT
GND
GND
Ch1 OUT
11
Ch1
STK433-290-E
IN
10kΩ
Ch1
11
IN
10kΩ
0.1μF
ΔVBE
22μF
22μF
Tr4
SW transistor
82kΩ
12
Ch1
NF
100kΩ
22kΩ
Ch1
12
NF
82kΩ
82kΩ
82kΩ
1kΩ
22kΩ
56kΩ
100kΩ
ST-BY
13
ST-BY
1kΩ
56kΩ
100kΩ
13
-V CC
22μF
22μF
4.7kΩ
Tr5
Latch up
circuit
DC offset protection
(*4)
R2
(*4)
14
R2
Ch2
NF
14
Ch2
NF
IST
100kΩ
15
Ch2
IN
15
Ch2
(3) Latch-up
Tr6
IN
I3
circuit part
Ch3
16
IN
16
Ch3
IN
(4) DC offset
protection
Ch3
17
NF
56kΩ 6.8kΩ
Ch3
17
NF
OUT(+)
56kΩ
Ch3
Tr1
18
OUT
Ch3
18
6.8kΩ
Ch3 OUT
Stand-by
Control
Mute
Control
OUT(-)
19
Ch3
OUT
Ch3
19
+5V
ST-BY
(*1)R1
2.7kΩ
2.7kΩ
(ex)
(*1)
(ex)
Operate mode (VSTOFF) ≥ 2.5V
Stand-by mode (VSTON) ≤ 0.6V (0V typ)
Point.C
Point.B
(*1) The voltage applied to the Stand-by pin (#13)
10kΩ
10kΩ
10kΩ
must not exceed the maximum rated value (VST max).
10kΩ
2.2kΩ
MUTE
+5V
33μF
/10V
PLAY
1) Stand-by control circuit part
33kΩ
33μF
H: Operation mode (+5V)
L: Stand-by mode (0V)
33kΩ
1kΩ
1kΩ
2kΩ
Ch3 IN
Ch2 IN
GND
Ch1 IN
2kΩ
Mute Control
H: Single Mute
L: Normal
No. A1630-11/13
MUTE
Stand-by Control (ex)
H: Operation Mode (+5V)
L: Stand-by Mode (0V)
Stand-By Control
Voltage VST
ST-BY