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REJ03F0052_M54679SP Datasheet

  • REJ03F0052_M54679SP

  • 2-Phase Stepper Motor Driver

  • 12頁

  • HITACHI

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M54679SP
2-Phase Stepper Motor Driver
REJ03F0052-0100Z
Rev.1.0
Sep.17.2003
Description
The M54679SP is a semiconductor integrated circuit that can drive the bipolar stepping motor directly by controlling
the coil-current at low level.
Features
鈥?/div>
Wide supply voltage sphere (10 to 35 V)
鈥?/div>
Bipolar, constant current PWM function.
(Topside transistors PWM function, maximum current is 0.8 Amps.)
鈥?/div>
Few external components.
(This IC can be operated with 1 capacitor and 2 resistances.)
鈥?/div>
4 phases input style (include the protection function of output through current).
鈥?/div>
Output current charge function (2 bits, 4 type currents).
鈥?/div>
Thermal protection circuit.
鈥?/div>
Include flywheel diodes.
Application
鈥?/div>
Printer, PPC and Facsimile.
Function
The M54679SP is a semiconductor integrated circuit, which can drive to 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 includes two current control circuits.
Block Diagram
Out1B Vm1 Out1A
Ph1A
Out2A Vm2 Out2B
Ph2A
Ph1B
Source
PWM
Source
PWM
Ph2B
P.GND
P.GND
Vcc
Regout
(3.5V)
18K
1.25V
Spike
current
cancel
Current
comp1
R
S
Q
FF1
Q
R
FF2
S
Spike
current
cancel
Current
comp2
10K
Vref
I0(1)
I1(1)
TSD
Standby
Frequency
Generator
VTM
VTH
VTL
I0(2)
I1(2)
Rs1
S1
Stby
P.GND
Fref
GND
S2
Rs2
Rev.1.0, Sep.17.2003, page 1 of 11

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