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STK681-320 bảng dữ liệu(PDF) 6 Page - ON Semiconductor

tên linh kiện STK681-320
Giải thích chi tiết về linh kiện  Forward/Reverse Motor Driver
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STK681-320 bảng dữ liệu(HTML) 6 Page - ON Semiconductor

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STK681-320
No. A0762-6/10
(6) Sample Timing Diagram
(7) Smoke Emission Precautions: There is a possibility of smoke emission if the hybrid IC is subjected to physical or
electrical damage as the result of being used without compliance with the specifications.
I/O Functions of Each Pin
Pin Name
Pin No.
Function
IN1
12
Input pin for turning F1 and F3 ON and OFF
At high level, F1: ON and F3: OFF; at low level F1: OFF and F3: ON
IN2
13
Input pin for turning F2 and F4 ON and OFF
At high level, F2: ON and F4: OFF; at low level, F2: OFF and F4: ON
INH
14
Pin for turning F1 and F2 OFF; At high level F1 and F2: OFF
This pin is usually low or open.
OUT1
8
This pin connects to the motor and outputs source/sync current depending on conditions at IN1 and IN2.
OUT2
6
This pin connects to the motor and outputs source/sync current depending on conditions at IN1 and IN2.
Vref1a
Vref1b
16
18
This pin is used for current setting for constant-current operation performed with the Vrefa and Vrefb pins
connected
A voltage of 0.29V at Tc=25
°C results for Vref1.
0.29V is set by connecting 82k
Ω and 5.1kΩ in series.
Current detection resistance is Rs=0.056
Ω. Set using IO peak=Vref1÷Rs.
Vref2
17
Be sure to usually leave this pin open.
The overheating control circuit can be made to stop operating by connecting this pin to the GND or S.P pin.
S.P
2
Vref1 voltage can be lowered by connecting a resistor between the Vref1 and S.P pins.
RSO
3
This pin is used to monitor the voltage across the current sensing resistor, Rs. Must be connected to the RSI
pin.
RSI
19
This pin is connected to the RSO pin and serves as an input to the circuit that compares the input with Vref1.
Forward
rotation
Brake
Reverse
rotation
IN1
IN2
INH
Stop 1
Stop 2
Stop 1
IN1
IN2
INH
Stop 1
Stop 1
Stop 2
Forward
rotation
Forward
rotation
Forward
rotation
Brake
Brake
Brake
Reverse
rotation
Reverse
rotation
Reverse
rotation


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