M54678FP Datasheet - 2-PHASE STEPPER MOTOR DRIVER

MITSUBISHI M54678FP 2-PHASE STEPPER MOTOR DRIVER DESCRIPTION The M54678FP is a semiconductor int...

MITSUBISHI M54678FP 2-PHASE STEPPER MOTOR DRIVER DESCRIPTION The M54678FP is a semiconductor integrated circuit designed for stepper motor driver used to printer, PPC and facsimile. PIN CONFIGURATION (TOP VIEW) P.GND Out1 Out1B Rs1 S1 Vm 1 2 3 4 5 6 7 36 35 34 33 32 31 30 29 28 GND 27 26 25 24 23 22 21 20 19 N.C N.C Ph2 En2 Vref2 Fref N.C Out2 Out2B Rs2 S2 Vm FEATURES q Wide supply voltage range (10 – 35V) q Output current is controlled by PWM operation q Few external components (This IC can be operated with 1 capacitor and 2 resistances) q Voltage stabilizer circuit (Regout = 3.5V) q Thermal protection circuit q Flywheel diode APPLICATION Printers, PPC, facsimile 8 9 GND 10 11 12 N.C VCC Ph1 En1 Vref1 Regout 13 14 15 16 17 18 M54678FP FUNCTION The M54678FP is a integrated circuit which can drive two phase stepper motor. The output current direction is determined by phase terminal function, and the output current level is controlled by Vref terminals voltage. Outline 36P2R-D N.C: no connection BLOCK DIAGRAM Out1 Out1B Vm Out2 Out2B Ph1 En1 Ph2 En2 Delay Source PWM Delay Delay Source PWM Delay Logic Logic Logic Logic P.GND P.GND VCC Spike current cancel Current comp1 R Q FF1 S Q R FF2 S Spike current cancel Regulator(3.5V) Current comp2 VTH VTL 1.25V Regout Frequency Generator 10K 18K VTM Rs1 S1 Vref1 Fref Vref2 S2 Rs2 GND MITSUBISHI M54678FP 2-PHASE STEPPER MOTOR DRIVER PIN FUNCTION Sym...