M54672SP Datasheet, PDF (1/5 Pages) Mitsubishi Electric Semiconductor – 2-PHASE STEPPER MOTOR DRIVER

MITSUBISHI <CONTROL / DRIVER IC>
M54672SP
2-PHASE STEPPER MOTOR DRIVER
DESCRIPTION
The M54672SP is a semiconductor IC to drive a stepper motor
directly by controlling the coil current with the constant current
method.
FEATURES
q Wide output current control range (20 – 1200mA)
q Bipolar and constant current drive
q Built in a thermal shutdown circuit
q Built in flywheel diodes
APPLICATION
Office automation equipment such as printer, FDD, HDD and FAX
FUNCTION
The M54672SP can drive a stepper motor by the 2-phase bipolar
method and also control the coil current. Furthermore, it controls
the direction of the coil current with Ph input pins (pins 16 and 17)
and the coil current value with VR pins (pins 3 and 30).
Because two control circuits are built in this IC, a stepper motor
can be driven with a single IC by the 2-phase bipolar method.
PIN CONFIGURATION (TOP VIEW)
Standby input (1) St1 ₁
Comparator input (1) C1 ₂
Comparator
reference input (1) ^VR1 3
Bootstrap power
supply (1)
Vbs1
4
Output power
supply (1)
VMM1
5
Output (1) _{MA1 6}
Current sensor (1) E1 7
8
GND
9
10
Output (1) MB1 ₁₁
Output power supply (1) VMM1 ₁₂
Bootstrap power
supply (1)
Vbs1 13
Power supply (1) Vcc1 ₁₄
One-shot-multi time
constant (1)
Output current direction
switching (1)
T1 15
Ph1 16
32 St2 Standby input (2)
31 C2 Comparator input (2)
30 VR2
Comparator reference
input (2)
29
Vbs2
Bootstrap power
supply (2)
28
VMM2
Output power
supply (2)
27 MA2 Output (2)
26 E2 ^{Current sensor (2)}
25
24 GND
23
22 MB2 ^{Output (2)}
21 VMM2 ^{Output power supply (2)}
20
Vbs2
Bootstrap power
supply (2)
19 Vcc2 Power supply (2)
18 T2
17 Ph2
One-shot-multi time
constant (2)
Output current direction
switching (2)
Outline 32P4B
BLOCK DIAGRAM
32 30 17
29
28 27 22
21 20
1 3 16
4
5
6 11 12 13
19
14
Voltage sensor
Monostable
Standby circuit
comparator
Voltage sensor
Monostable
Standby circuit
comparator
25 24 23
31
GND
C2
Comparator input(2)
18
26
T2
E2
Current sensor(2)
One-shot-multi time constant(2)
8 9 10
2
GND
C1
Comparator input(1)
15
7
T1
E1
Current sensor(1)
One-shot-multi time constant(1)