M54679FP
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M54679FP - M54679FP
Notice: This final specification. Some parametric limits subject change.
M54679FP
2-PHASE STEPPER MOTOR DRIVER
DESCRIPTION
M54679FP semiconductor integrated circuit designed stepper motor driver used Printer, Facsimile.
CONFIGURATION (TOP VIEW)
Out2A Out2B
FEATURES
Wide supply voltage sphere 35V). Bipolar, constant current function. (Top side transistors function, maximum current Amps). external components. (This operated with capacitor resistances). phases input style (include protection function output through current). Output current change function bits, type currents). Thermal protection circuit. Include flywheel diodes.
P.GND Out1A Out1B
M54679FP
Ph2A Ph2B Fref Regout I0(2) I1(2)
APPLICATION
Printer, Facsimile.
FUNCTION
M54679FP semiconductor integrated circuit which drive phase stepper motor. control direction motor current output motor current steps) terminals. Also, drive phase bipolar stepper motor include current control circuits.
Ph1A Ph1B Stby Vref I0(1) I1(1)
Outline 42P9R-A
N.C: connection
BLOCK DIAGRAM
Ph1A
Out1B
Out1A
Out2A
Out2B Ph2A
Ph1B
Source Logic Logic Logic
Source Logic
Ph2B
P.GND Regout (3.5V) 1.25V Current comp1
P.GND
Spike current cancel
Spike current cancel
Vref
Current comp2
I0(1) I1(1)
Standby
Frequency Generator
I0(2) I1(2)
V
Stby
P.GND
Fref
Notice: This final specification. Some parametric limits subject change.
M54679FP
2-PHASE STEPPER MOTOR DRIVER
FUNCTION
Symbol Vm1, Out1A, Out1B, Out2A, Out2B Rs1, Ph1A, Ph1B, Ph2A, Ph2B I0(1), I1(1), I0(2), I1(2) Stby Vref Regout Fref P.GND Terminal Motor Supply Voltage Output terminals Current sensor Power supply Phase input Output current change Standby input Sense inputs Vref input Output voltage stabilizer capacitor oscillator Power Function Power supply motor drive. Motor drive output terminals. Output current sensing resistor (Rs) connection terminals. Control circuit power supply. Output current direction switch terminals. Output current change (100%, 70%, 33%, terminals. Standby input Standby, open: motor function) terminal. Input voltage terminal comparators. Reference voltage setting output current. Output voltage stabilizer (3.5V). capacitor carrier frequency. terminal bottom side flywheel diodes.
ABSOLUTE MAXIMUM RATINGS 25°C unless otherwise noted.)
Symbol Iout Vlogic Vanalog Topr Tstg Parameter Motor supply voltage Output current Power supply Logic input voltage Analog input voltage Output current sensing Power dissipation Thermal derating Junction temperature Operating temperature Storage temperature Conditions Ratings -0.3 ±0.8 -0.3 -0.3 -0.3 Units °C/W
phase Ph1A, Ph1B, Ph2A, Ph2B, Stby Vref, Rs1, Under board mount condition. (see next page)
Notice: This final specification. Some parametric limits subject change.
M54679FP
2-PHASE STEPPER MOTOR DRIVER
FUNCTIONAL CONDITIONS
Symbol Iout tPLH tPHL Toff TSDon Parameter Power supply Motor supply voltage Output current Rising time logic inputs Falling time logic inputs time time Thermal shut down Min. Limits Typ. Max. Units
ELECTRICAL CHARACTERISTICS 25deg, 5.0V, unless otherwise noted.) CONTROL CIRCUIT
Symbol ICC1 ICC2 ICC3 Vlogic Vlogic I(Ph) I(Ph) I(I0, I(I0, I(Stby) I(Stby) I(S) V(S) I(Vref) V(Vref) Vreg VCH(H) VCH(M) VCH(L) Parameter Conditions Stby Ph*A Ph*B (Bridge Stby Ph*A Ph*B (Bridge OFF) Stby (Standby condition) Min. -400 -400 3.35 Limits Typ. -3.0 -300 -300 -3.0 3.50 Max. VCH(H) 3.65 Units
Supply current Logic input voltage (Ph, Stby terminals) Phase terminal input current terminals input current Standby terminal input current Current sensing Comparators input current Current sensing Comparators input voltage sphere Vref input current Vref input voltage sphere Oscillation frequency Fref Voltage stabilizer output Current sensing Comparators threshold voltage
terminals input current Vref 5V). terminal input voltage sphere Input current Vref (Vref 390pF, Fref terminal oscillation Iout -0.1mA +1mA Vref (Vref/10*100%) Vref (Vref/10*70%) Vref (Vref/10*33%)
Notice: This final specification. Some parametric limits subject change.
M54679FP
2-PHASE STEPPER MOTOR DRIVER
OUTPUT CIRCUIT 25deg, 5.0V, unless otherwise noted.)
Symbol Vsat Ileak VF(H) VF(L) tdon tdoff Parameter Output saturation voltage Output leakage current flywheel diode (Top) flywheel diode (Bottom) Turn delay output Turn delay output Conditions Bottom Load current 0.6A. 0.6A 0.6A Time until output become since Vref Time until output become since Vref Min. -100 Limits Typ. Max. +100 Units
FUNCTION EXPLANATION
(1). inputs make decision output function. Ph*A Ph*B Out*A Out*B
outputs shut under Ph*A Ph*B High condition same time.
(2). Output current terminal output current setting. Current sensing comparators threshold voltage (Vref=5V) 500mV 350mV 155mV
Output current ratio 100%
(3). Equivalent circuit Vref terminal. equivalent circuit Vref terminal shown right circuit. Vref terminal needs typical 500µA input current, consider this value when Vref voltage set. (4). Current sensing comparators. current sensing comparators compare voltage (VRS) current sensing resistor threshold voltage (VCH) this comparators, then VCH, comparators output change shut output.
(5). Oscillation circuit. External capacitor charged discharged constant current triangular waveform appears Vref terminal. waveform voltage level shown right figure. This triangular waveform carrier frequency circuit. carrier frequency change this external capacitor value changed. M54679FP designed that oscillation frequency 30kHz external capacitor value 390pF. oscillation frequency inverse proportion value external capacitor.
Vref 3.5k 0.68k 2.5V 0.5V
Notice: This final specification. Some parametric limits subject change.
M54679FP
2-PHASE STEPPER MOTOR DRIVER
(6). Spike current cancellation. Output power transistors then spike current appears (current sensing) short time this caused internal delay time. M54679FP cancellation circuit spike current current sensing comparators cause error functions. function current sensing comparators shut during since output power transistors (7). signal delay circuit. M54679FP delay time 3.0µs until output H-bridge power stage since signal change high. This delay time enough short time frequency (plus rate) signal there problem normal function. (8). terminal. terminal (non-inverted input current sensing comparators) connected nearest position current sensing resistor, error current sensing means wire resistance board will decreased. (9). Voltage stabilizer. M54679FP voltage stabilizer 3.5V. reference voltage (Vref) connect output (Regout) voltage stabilizer directly. this case, current capability output voltage stabilizer 1.0mA (source current), 0.1mA (sink current).
(10). Setting output current. output circuit M54679FP designed bipolar type transistors, current that through motor coil smaller about 15mA (typical) than current that through current sensing resistor. This caused base current power transistors. Therefore, aware this base current when output current set. (11). Power terminal. Power connected anodes flywheel diodes bottom side. When output H-bridge power stage goes flyback current through this terminal, minimize wire resistor this board.
Iout
15mA (Typ.)
Iout
Notice: This final specification. Some parametric limits subject change.
M54679FP
2-PHASE STEPPER MOTOR DRIVER
(12). Output current timing chart under inputs output conditions. Under output current wave forms show current that motor driver going control, these show actual current wave forms.
steps function>
Ph1A Ph1B Ph2A Ph2B I0(1),I0(2) I1(1),I1(2) Output current (Current Phase Output current (Current Phase 100%
Torque vector
100% 100% 100% 100%
steps function>
Ph1A Ph1B Ph2A Ph2B I0(1),I0(2) I1(1),I1(2) Output current (Current Phase Output current (Current Phase
100%
steps function>
Ph1A Ph1B Ph2A Ph2B I0(1) I1(1) I0(2) I1(2) 100%
Output current (Current Phase Output current (Current Phase
Notice: This final specification. Some parametric limits subject change.
M54679FP
2-PHASE STEPPER MOTOR DRIVER
(13). Inputs terminals. Symbol Equivalent circuit circumstance input terminals. Remarks
pin: Stby pin: I0(1) pin: I1(1) pin: I0(2) pin: I1(2)
pin: Ph1A pin: Ph1B pin: Ph2A pin: Ph2B
pin: pin:
pin: Vref
I0(1)
I0(2)
I1(1)
I1(2)
Notice: This final specification. Some parametric limits subject change.
M54679FP
2-PHASE STEPPER MOTOR DRIVER
Symbol
Equivalent circuit circumstance input terminals.
Remarks
Fref
Fref
THERMAL DERATING
(watts) Power Dissipation (Pdp)
Using J-type board watts
Ambient Temperature
(°C)
Notice: This final specification. Some parametric limits subject change.
M54679FP
2-PHASE STEPPER MOTOR DRIVER
APPLICATION CIRCUIT
STEPPER MOTOR
Rrs1
P.GND Out1A Out1B
Out2A Out2B
Rrs2
M54679FP
input input input input input Ph1A Ph1B Stby Vref I0(1) I1(1)
Ph2A Ph2B Fref Regout I0(2) I1(2)
input input
390pF input input
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