M54679FP Datasheet, PDF (1/9 Pages) Mitsubishi Electric Semiconductor – 2-PHASE STEPPER MOTOR DRIVER

PRELIMINARY
Notice: This is not a final specification.
Some parametric limits are subject to change.
MITSUBISHI <CONTROL / DRIVER IC>
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.
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.
APPLICATION
Printer, PPC and Facsimile.
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.
BLOCK DIAGRAM
Ph1A
Out1B Vm1 Out1A
PIN CONFIGURATION (TOP VIEW)
N.C 1
P.GND 2
Out1A 3
Out1B 4
RS1 5
S1 6
Vm1 7
8
9
10
GND 11
12
13
14
VCC 15
Ph1A 16
Ph1B 17
Stby 18
Vref 19
I0(1) 20
I1(1) 21
42 N.C
41 N.C
40 Out2A
39 Out2B
38 Rs2
37 S2
36 Vm2
35
34
33
32 GND
31
30
29
28
27 Ph2A
26 Ph2B
25 Fref
24 Regout
23 I0(2)
22 I1(2)
Outline 42P9R-A
N.C: no connection
Out2A Vm2 Out2B
Ph2A
Ph1B
Source
PWM
Source
PWM
Ph2B
Regout
(3.5V)
Vref
I0(1)
I1(1)
1.25V
18K 10K
P.GND
Spike
current
cancel
Current
comp1
RQ
FF1
S
P.GND
QR
FF2
S
Spike
current
cancel
Current
comp2
TSD
Standby
Rs1
S1
Stby
Frequency
Generator
VTM
P.GND Fref
VTH
VTL
GND
S2
RS2
VCC
I0(2)
I1(2)