STK681-332-E

No. A1591-7/14

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 pin) shown in the internal block diagram or sample application circuit to a

circuit pattern on the PCB.

(4) Sample Timing Diagram

(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.

OUT1 or OUT2

Output voltage

F3 or F4

Drain current

Motor current

22

μs

0A

GND

VCC+Vdf

IO peak (current setting value)

0A

IO peak (current setting value)

Forward

rotation

Brake

Reverse

rotation

Stop

Stop

Forward

rotation

IN1

IN2

ENABLE

Stop

Brake