STK681-300 Sanyo Semicon Device, STK681-300 Datasheet - Page 6

• Manufacturer Part Number: STK681-300
• Description: Forward/Reverse Motor Driver
• Manufacturer: Sanyo Semicon Device

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(6) Sample Timing Diagram
(7) Smoke Emission Precautions: There is a possibility of smoke emission if the hybrid IC is subjected to physical or
I/O Functions of Each Pin
Pin Name
electrical damage as the result of being used without compliance with the specifications.
Vref1a
Vref1b
OUT1
OUT2
Vref2
RSO
INH
IN1
IN2
S.P
RSI
IN1
IN2
INH
IN1
IN2
INH
Stop 1
Stop 1
Pin No.
12
13
14
16
18
17
19
8
6
2
3
Forward
Forward
rotation
rotation
Input pin for turning TR1 and F1 ON and OFF
At high level, TR1: ON and F1: OFF; at low level TR1: OFF and F1: ON
Input pin for turning TR2 and F2 ON and OFF
At high level, TR2: ON and F2: OFF; at low level, TR2: OFF and F2: ON
Pin for turning TR1 and TR2 OFF; At high level TR1 and TR2: OFF
This pin is usually low or open.
This pin connects to the motor and outputs source/sync current depending on conditions at IN1 and IN2.
This pin connects to the motor and outputs source/sync current depending on conditions at IN1 and IN2.
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 82kΩ and 5.1kΩ in series.
Current detection resistance is Rs=0.10Ω. Set using I O peak=Vref1÷Rs.
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.
Vref1 voltage can be lowered by connecting a resistor between the Vref1 and S.P pins.
This pin is used to monitor the voltage across the current sensing resistor, Rs. Must be connected to the RSI
pin.
This pin is connected to the RSO pin and serves as an input to the circuit that compares the input with Vref1.
Brake
Brake
Reverse
rotation
Reverse
rotation
STK681-300
Stop 2
Brake
Function
Forward
Forward
rotation
rotation
Reverse
Reverse
rotation
rotation
Stop 2
Brake
Stop 1
Stop 1
No. A0760-6/10
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