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PDF M54678FP Data sheet ( Hoja de datos )

Número de pieza M54678FP
Descripción 2-PHASE STEPPER MOTOR DRIVER
Fabricantes Mitsubishi 
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No Preview Available ! M54678FP Hoja de datos, Descripción, Manual

MITSUBISHI <CONTROL / DRIVER IC>
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.
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
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.
PIN CONFIGURATION (TOP VIEW)
P.GND
Out1
Out1B
Rs1
S1
Vm
GND
N.C
VCC
Ph1
En1
Vref1
Regout
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
36 N.C
35 Out2
34 Out2B
33 Rs2
32 S2
31 Vm
30
29
28
GND
27
26
25
24 N.C
23 N.C
22 Ph2
21 En2
20 Vref2
19 Fref
Outline 36P2R-D
N.C: no connection
BLOCK DIAGRAM
Ph1
En1
Delay
Out1 Out1B
Source
PWM
Vm
Delay
Delay
Out2 Out2B
Source
PWM
Delay
Ph2
En2
P.GND
Spike
current
cancel
Current
comp1
RQ
FF1
S
P.GND
QR
FF2
S
Frequency
Generator
VTM
Spike
current
cancel
Current
comp2
VTH
VTL
VCC
Regulator(3.5V)
1.25V
Regout
10K 18K
Rs1 S1 Vref1
Fref
Vref2
S2 Rs2
GND

1 page




M54678FP pdf
THERMAL DERATING
MITSUBISHI <CONTROL / DRIVER IC>
M54678FP
2-PHASE STEPPER MOTOR DRIVER
With infinite heat sink
5.0
4.5 Mounted on
circuit board (*1)
4.0
Without heat sink
3.0
2.0
1.2
1.0
0 25 50 75 100 125
Ambient Temperature Ta (°C)
(*1): Mounted on 100mm × 100mm, t = 1.6µm (copper foil = 35µm) circuit board
APPLICATION CIRCUIT
STEPPER MOTOR
150
M
1 P.GND
N.C 36
2 Out1
Out2 35
3 Out1B
Out2B 34
Rrs1
4 Rs1
5 S1
Rs2 33
S2 32
Rrs2
6 Vm1
Vm2 31
An example of the setting
Vm 7 30
8 29 Rrs1, Rrs2 = 0.5 – 1.0
Cfref
= 390pF
9
10 GND
GND
28
27
11 26
12 25
13 N.C
N.C 24
14 Vcc
N.C 23
Vcc
input
15 Ph1
Ph2 22
input
input
16 En1
En2 21
input
17 Vref1
Vref2 20
3.5V
18 Regout
Fref 19
Cfref

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