M54678FP Mitsubishi Electronics America, Inc., M54678FP Datasheet - Page 5

• Manufacturer Part Number: M54678FP
• Description: 2-phase Stepper Motor Driver
• Manufacturer: Mitsubishi Electronics America, Inc.

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