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
• Wide supply voltage sphere (10 to 35 V) • Bipolar, constant current PWM function. (Topside transistors PWM function, maximum current is 0.8 Amps.) • Few external components. (This IC can be operated with 1 capacitor and 2 resistances.) • 4 phases input.
2-Phase Stepper Motor Driver
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
• Wide supply voltage sphere (10 to 35 V) • Bipolar, constant current PWM function. (Topside transistors PWM function, maximum current is 0.8 Amps.) • Few external components. (This IC can be operated with 1 capacitor and 2 resistances.) • 4 phases input style (include the protection function of output through current). • Output current charge function (2 bits, 4 type currents). • Thermal protection circuit. • Include flywheel diodes.
Application
• 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
M54679SP
Pin Configuration (Top View)
I1(2) I0(2) Regout Fref Ph.