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
Vm2
Out2B Ph2A
Ph1B
Source PWM Logic Logic Logic
Source PWM Logic
Ph2B
P. GND Regout (3. 5V) 1. 25V Current comp1
P. GND
VCC
Spike current cancel
R Q FF1 S
Q R FF2 S
Spike current cancel
18K Vref
10K
Current comp2
I0(1) I1(1)
TSD Standby
Frequency Generator
VTH VTL
I0(2) I1(2)
VTM
Rs1
S1
Stby
P. GND
Fref
GND
S2
RS2
MITSUBISHI
PRELIMINARY
Notice: This is not a final specification. Some parametric limits are subject to change.
M54679FP
2-PHASE STEPP...
M54679FP PDF File
