STK681-352-E Datasheet, PDF (7/14 Pages) Sanyo Semicon Device – Forward/Reverse Motor Driver

STK681-352-E
Notes
(1) Be sure to set the capacitance of the power supply bypass capacitor, C1, so that the ripple current of the capacitor,
which varies as motor current increases, falls within the allowed range.
(2) Chopping operations based on F3 and F4 are used for current control. The timing given below is used for OUT1 or
OUT2 voltage output and for F3 or F4 drain current.
(3) Do not connect the N.C pins (5, 11, 12 and 15 pin) shown in the internal block diagram or sample application
circuit to a circuit pattern on the PCB.
OUT1 or OUT2
Output voltage
VCC+Vdf
F3 or F4
Drain current
Motor current
22μF
GND
IO peak (current setting value)
0A
IO peak (current setting value)
0A
(4) Sample Timing Diagram
IN1
IN2
ENABLE
Stop
Forward
rotation
Brake
Reverse
rotation
Stop
Forward
rotation
Brake
Stop
(5) If the current detection resistor, Rs, connected to pin1, pin2, and pin3 is short-circuited, the overcurrent detection
circuit does not operate. If the output pin is short-circuited directly to VCC or connected directly to GND, an
output short-circuit condition is detected and the output is latched in the off state. To restart the operation, turn on
VDD again.
(6) 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.
No.A1929-7/14