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STK433-120-E bảng dữ liệu(PDF) 9 Page - Sanyo Semicon Device

tên linh kiện STK433-120-E
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STK433-120-E
No. A1595-9/11
STK433-100 Series Application Explanation
The protection circuit application for the STK433-100sr 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
1) Standby control circuit block
(Reference example) STK433-100 series test circuit (when +5V is applied to Stand-by control.)
Concerning pin 13 reference voltage VST
<1> Operation mode
The switching transistor in the bias circuit turns on and places the amplifier into the operating mode when the
current flowing into pin 13 (IST) becomes 0.25mA or greater.
<2> Standby mode
When the current flowing into pin 13 (IST) is stopped (=0mA), the switching transistor in the bias circuit turns
off, placing the amplifier into the standby mode.
(*1) The current limiting resistor (R1) must be used to ensure that the current flowing into the stand-by pin
(pin 13) does not exceed its maximum rated value IST 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 standby mode.
2
3
4
5
6
7
8
9
10
11
12
13
14
1
15
OUT Ch1
STK433-100 series
56k
Ω
IST
+VCC
Ch1
IN
Ch1
NF
Ch2
IN
Ch2
NF
Ch2
OUT(-)
Ch1
OUT(+)
-VCC
SUB GND
+PRE
ST-BY
Ch1
OUT(-)
Ch2
OUT(+)
-PRE
6.8k
Ω
56k
Ω
6.8k
Ω
(2) Load short
detection part
22k
Ω
56k
Ω
1k
Ω
0.1
μF10kΩ
100k
Ω
1k
Ω
33k
Ω
2k
Ω
(*1) R1
13k
Ω
33
μF
OUT Ch2
82k
Ω
82k
Ω
100
k
Ω
22
μF
22
μF
1) Stand-by control circuit part
H: Operation mode (+5V)
L: Stand-by mode (0V)
Point.B
Point.B
Point.C
Point.C
Tr1
Tr2
Stand-by Circuit
in Pre Driver IC
SW transistor
ΔVBE
Stand-By Control
Voltage VST
(*4) R2
I2
I3
(3) Latch-up
circuit part
(4) DC offset
protection
Tr4
Tr5
Tr3
Tr5
Tr6
-VCC
2
3
4
5
6
7
8
9
10
11
12
13
14
1
15
STK433-100series
+VCC
Ch1
IN
Ch1
NF
Ch2
IN
Ch2
NF
Ch2
OUT
Ch1
OUT
-VCC
GND
+PRE
ST-BY
Ch1
OUT
Ch2
OUT
-PRE
1k
Ω (*3)
33k
Ω
2k
Ω (*3)
(*1) R1
13k
Ω
33
μF
(*2)
1) Stand-by control
H: Operation mode (+5V)
L: Stand-by mode (0V)
ΔVBE
Stand-By Control
Voltage VST
Sink current IST
SUB
ΔVBE
ex) Stand-by control voltage=+5V
IST=(VST-VBE*2)/R1
=(5-0.6*2)/13k
Ω
≈0.3(mA)
Stand-by Circuit
in Pre Driver IC


Số phần tương tự - STK433-120-E

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Mô tả tương tự - STK433-120-E

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