MITSUBISHI
M54677FP
2-PHASE STEPPER MOTOR DRIVER
DESCRIPTION
The M54677FP is a semiconductor IC to drive a bipolar stepper motor directly by controlling the coil current with the constant current method.
PIN CONFIGURATION (TOP VIEW)
St1 C1 Vref1 1 2 3 4 5 6 7 36 35 34 33 32 31 30 St2 C2 Vref2 VM21 MA2 E2
FEATURES
q Wide output current control range (20 – 1000mA) q Bipolar and constant current q Built in a thermal shutdown circuit q Built in flywheel diodes
VM11 MA1 E1
M54677FP
8
29 28 27 26 25 24 23 22 21 20 19 N. C MB2 VM22 Vcc2 T2 Ph2 GND
APPLICATION
Office automation equipment such as printer, FDD, HDD, and FAX
9 GND 10 11
FUNCTION
The M54677FP 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 by Ph input and the coil current value by Vref pin. 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.
12 N. C 13 MB1 14 VM12 15 Vcc1 16 T1 17 Ph1 18
Outline 36P2R-D N. C: no connection
BLOCK DIAGRAM
VM21
VM22
VM11
36
34
19
33
32
23 22
1
3
18
4
5
MA1
14 15
VM12
Vref2
MA2
MB2
Vref1
MB1
Ph2
St2
Ph1
St1
Vcc2
21
16
current -comp +
–
mono-multi
current -comp +
–
mono-multi
–
–
+
Buffer
+ standby -comp 31 E2 7
Buffer
25
–
standby -comp 30 35 C2 20 T2
– 12
GND
2 C1
17 T1
6 E1
GND
Vcc1
MITSUBISHI
M54677FP
2-PHASE STEPPER MOTOR DRIVER
ABSOLUTE MAXIMUM RATINGS (Ta=25˚C, unless otherwise noted)
Symbol Vcc VM VL Vc Vref IO Pd Kθ Tj Topr Tstg Parameter Supply voltage Output supply voltage Logic input voltage Analog input voltage Comparative input voltage Output current Allowable loss Thermal derating Junction temperature Operating temperature Storage temperature Conditions Pins Pins Pins Pins Pins
16
and
21
4 15 33 1 36 18 2 3
and 32 and 19
and and
35 34
Mounted on a glass epoxy board (100mm x 100mm, ...
M54677FP PDF File
