M54677FP Datasheet PDF

MITSUBISHI M54677FP 2-PHASE STEPPER MOTOR DRIVER DESCRIPTION The M54677FP is a semiconductor IC ...

MITSUBISHI M54677FP 2-PHASE STEPPER MOTOR DRIVER DESCRIPTION The M54677FP is a semiconductor IC to drive a bipolar stepper motor directly by controlling the coil current with the constant current method. PIN CONFIGURATION (TOP VIEW) St1 C1 Vref1 1 2 3 4 5 6 7 36 35 34 33 32 31 30 St2 C2 Vref2 VM21 MA2 E2 FEATURES q Wide output current control range (20 – 1000mA) q Bipolar and constant current q Built in a thermal shutdown circuit q Built in flywheel diodes VM11 MA1 E1 M54677FP 8 29 28 27 26 25 24 23 22 21 20 19 N.C MB2 VM22 Vcc2 T2 Ph2 GND APPLICATION Office automation equipment such as printer, FDD, HDD, and FAX 9 GND 10 11 FUNCTION The M54677FP can drive a stepper motor by the 2-phase bipolar method and also control the coil current. Furthermore, it controls the direction of the coil current by Ph input and the coil current value by Vref pin. Because two control circuits are built in this IC, a stepper motor can be driven with a single IC by the 2-phase bipolar method. 12 N.C 13 MB1 14 VM12 15 Vcc1 16 T1 17 Ph1 18 Outline 36P2R-D N.C: no connection BLOCK DIAGRAM VM21 VM22 VM11 36 34 19 33 32 23 22 1 3 18 4 5 MA1 14 15 VM12 Vref2 MA2 MB2 Vref1 MB1 Ph2 St2 Ph1 St1 Vcc2 21 16 current -comp + – mono-multi current -comp + – mono-multi – – + Buffer + standby -comp 31 E2 7 Buffer 25 – standby -comp 30 35 C2 20 T2 – 12 GND 2 C1 17 T1 6 E1 GND Vcc1 MITSUBISHI M54677FP 2-PHASE ...