NJU7380

STEPPER MOTOR CONTROLLER ■ GENERAL DESCRIPTION NJU7380 is a translator to convert the signal of the STEP&DIR input method into Phase signal. It can control the stepping motor driver with STEP&DIR input signal to Phase input methods such as NJM3775, NJM3777. NJU7380 is also including Auto Current Down(ACD) circuit witch is suitable for reducing power dissipation of power devices and motor. ■ PACKAGE OUTLINE NJU7380M ■ FEATURES Operating Voltage 4.75V to 5.25V Internal Phase Logic Circuit Phase Logic Reset Function (RESET) Motor Origin Monitor Function (MO) Half / Full Step Mode Select (HSM) Auto Current Down Function (ACD) Specially matched to NJM37XX series Package DMP14 NJU7380 ■ BLOCK DIAGRAM VDD STEP DIR HSM RESET Ct SGND POR Phase Logic & ACD Logic P1 DIS1 P2 DIS2 ACD MO PGND Ver.2013-09-26 -1- NJU7380 ■ PIN CONNECTION DIR 1 STEP 2 HSM 3 RESET 4 MO 5 Ct 6 SGND 7 14 VDD 13 P1 12 P2 11 DIS1 10 DIS2 9 ACD 8 PGND DMP14 ■ PIN FUNCTION LIST No. Pin Name Description 1 DIR Direction command input for determining motor turning direction 2 STEP Motor steeping pulse input, phase logic operation triggered by negative edge of STEP signal 3 HSM Half / Full step mode select input “H” level in full step mode and “L” level in half step mode 4 RESET Phase logic initial input 5 MO Phase output initial status detection output 6 Ct A value of connected capacitor determines lock detection time (ton) and auto resume time (tOFF) 7 SGND SGND...