M54679FP Datasheet PDF

MITSUBISHI PRELIMINARY Notice: This is not a final specification. Some parametric limits are subj...

MITSUBISHI PRELIMINARY Notice: This is not a final specification. Some parametric limits are subject to change. M54679FP 2-PHASE STEPPER MOTOR DRIVER DESCRIPTION The M54679FP is a semiconductor integrated circuit designed for stepper motor driver used to Printer, PPC and Facsimile. PIN CONFIGURATION (TOP VIEW) N.C 1 2 3 4 5 6 7 8 9 42 41 40 39 38 37 36 35 34 N.C N.C Out2A Out2B Rs2 S2 Vm2 FEATURES q Wide supply voltage sphere (10 – 35V). q Bipolar, constant current PWM function. (Top side transistors PWM function, maximum current is 0.8 Amps). q Few external components. (This IC can be operated with 1 capacitor and 2 resistances). q 4 phases input style (include the protection function of output through current). q Output current change function (2 bits, 4 type currents). q Thermal protection circuit. q Include flywheel diodes. P.GND Out1A Out1B RS1 S1 Vm1 M54679FP 10 33 32 31 30 29 28 27 26 25 24 23 22 Ph2A Ph2B Fref Regout I0(2) I1(2) GND APPLICATION Printer, PPC and Facsimile. GND 11 12 FUNCTION The M54679FP is a semiconductor integrated circuit which can drive two phase stepper motor. It can control the direction of motor current and output motor current (4 steps) by I0, I1 terminals. Also, it can drive the two phase bipolar stepper motor by one IC as it include two current control circuits. 13 14 VCC Ph1A Ph1B Stby Vref I0(1) I1(1) 15 16 17 18 19 20 21 Outline 42P9R-A N.C: no connection BLOCK DIAGRAM Ph1A Out1B Vm1 Out1A Out2A ...