M54679FP

M54679FP MITSUBISHI | Alldatasheet

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2-PHASE STEPPER MOTOR DRIVER M 54679FP MITSUBISHI <CONTROL / DRIVER IC> PRE LIM INARY Notice: This is not a final specification. Some parametric limits are subject to change. PIN C O N FIG URAT IO N (TO P VIEW )DES CRIPT IO N The M54679FP is a semiconductor integrated circuit designed for stepper motor driver used to Printer, PPC and Facsimile. FEAT URES l Wide supply voltage sphere (10 – 35V). l Bipolar, constant current PWM function. (Top side transistors PWM function, maximum current is 0.8 Amps). l Few external components. (This IC can be operated with 1 capacitor and 2 resistances). l 4 phases input style (include the protection function of output through current). l Output current change function (2 bits, 4 type currents). l Thermal protection circuit. l Include flywheel diodes. APP LICAT IO N Printer, PPC and Facsimile. FUNCT IO N The M54679FP is a semiconductor integrated circuit which can drive two 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 include two current control circuits. B LOC K D IAGR A M Outline 42P9R-A Logic Vm1 Ph1A Ph1B Logic Ph2A Ph2B Logic Logic S1 Fref S2 VTM Rs1 R S 2 Out1B Out1A Out2A Out2B VCC VTL VTHFrequency Generator Spike current cancel Current comp1 Current comp2 GND Source PWM Source PWM P.GND P.GND Spike current cancel Stby P.GND Vm2 Standby TSD Regout (3.5V) 1.25V 10K18K Vref I0(2) I1(2) I0(1) I1(1) QR S FF1 QR S FF2 385 376 7 36 15 28 16 27 17 26 18 25 21 22 M54679FP N.C Out2A Out2B Rs2 Vm2 Ph2A Ph2B Fref Regout I0(2) I1(2) N.C P.GND Out1A Out1B R S 1 Vm1 VCC Ph1A Ph1B Stby Vref I0(1) I1(1) GND N.C GND N.C: no connection

2-PHASE STEPPER MOTOR DRIVER M 54679FP MITSUBISHI <CONTROL / DRIVER IC> PRE LIM INARY Notice: This is not a final specification. Some parametric limits are subject to change. V ABS O LUT E M AXIM UM RA TING S (Ta = 25°C unless otherwise noted.) Symbol Conditions UnitsParameter Vm Motorsupply voltage -0.3 – 37 PIN FUNCT IO N Iout VCC Vlogic Vanalog Pd Kq Tj Topr Ratings V Output current Per one phase –0.8 VPower supply A -0.3 – VCC VAnalog input voltage WUnder board mount condition. (see next page) 1.5 °C/W Power dissipation 2.7 Thermal derating 46 Junction temperature Operating temperature 150 -20 – 75 Rs1, Rs2 Ph1A, Ph1B, Ph2A, Ph2B, I0, I1, Stby Vref, S1, S2 Tstg Storage temperature Logic input voltage -40 – 125 Terminal FunctionSymbol Motor Supply Voltage Output terminals Current sensor Power supply Phase input Output current change Standby input Sense inputs Vref input Power supply for 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%, 0%) terminals. Standby input (L: Standby, H or open: motor function) terminal. Input voltage terminal of comparators. Reference voltage due to setting output current. Vm1, Vm2 Vref S1, S2 Stby Ph1A, Ph1B, Ph2A, Ph2B VCC Rs1, Rs2 Out1A, Out1B, Out2A, Out2B VRs Output current sensing -0.3 – 7.0 -0.3 – VCC V Regout Fref P.GND Output of voltage stabilizer A capacitor for oscillator Power GND Output of voltage stabilizer (3.5V). A capacitor due to PWM carrier frequency. The GND terminal of bottom side flywheel diodes.

2-PHASE STEPPER MOTOR DRIVER M 54679FP MITSUBISHI <CONTROL / DRIVER IC> PRE LIM INARY Notice: This is not a final specification. Some parametric limits are subject to change. EL ECT R ICAL CHARACT ERISTICS (Ta = 25deg, VCC = 5.0V, VM = 24V unless otherwise noted.) Limits Min. Typ. Max.Symbol Conditions UnitsParameter ICC 1 Supply current Stby = H, Ph*A = H, Ph*B = L (Bridge ON) ICC 2 Vlogic L I(Ph) L I(S) V(S) I(Vref) VCH(H) Logic input voltage (Ph, I1, I0, Stby terminals) Current sensing Comparators input current Current sensing Comparators input voltage sphere Vref input current Current sensing Comparators threshold voltage Vref input voltage sphere Stby = H, Ph*A = Ph*B (Bridge OFF) Vin = 0V S1 or S2 terminals input current (S1 or S2 = 0V, Vref = 5V). S1 or S2 terminal input voltage sphere Vlogic H V(Vref) FC VCH(M) Oscillation frequency of Fref C = 390pF, Fref terminal oscillation I0 = L, I1 = L, Vref = 5V (Vref/10*100%) I0 = H, I1 = L, Vref = 5V (Vref/10*70%) 2.4 -20 -20 -3.0 -3.0 VCC 0.6 VCH(H) 0 —V CC mA V mA mA V mA V mV mV I(Ph) H Phase terminal input current Vreg Vin = 5V —— 10 20 30 40 3.35 3.50 3.65 475 500 525 325 350 375 — 500 650 V CONTROL CIRCUIT FUNCT IO NA L CO NDITIO NS Limits Min. Typ. Max.Symbol UnitsParameter VVCC Power supply Motor supply voltageVm V Iout tPLH Output current Rising time of logic inputs 5.0 5.5 800 2.0 4.5 mA ms mstPHL Falling time of logic inputs PWM ON timeTon ms Toff TSDon PWM OFF time Thermal shut down 160 2.0 5.0 5.0 ms ICC 3 Stby = L (Standby condition) 2.0 4.0 6.0 I(I0, I1) L Vin = 0V -400 -300 — mAI(I0, I1) H I0, I1 terminals input current Vin = 5V — — 10 I(Stby) L Vin = 0V -400 -300 5.0 mAI(Stby) H Standby terminal input current Vin = 5V — — 10 VCH(L) Voltage stabilizer output Input current of Vref (Vref = 5V, I0 = I1 = 0V) Iout = -0.1mA – +1mA I0 = L, I1 = H, Vref = 5V (Vref/10*33%) 139 155 171 mV kHz

2-PHASE STEPPER MOTOR DRIVER M 54679FP MITSUBISHI <CONTROL / DRIVER IC> PRE LIM INARY Notice: This is not a final specification. Some parametric limits are subject to change. (5). Oscillation circuit. External capacitor is charged and discharged by the constant current and a triangular waveform appears to Vref terminal. The waveform voltage level is shown in right figure. This triangular waveform is a carrier frequency of PWM circuit. The carrier frequency change if this external capacitor value is changed. M54679FP is designed that the oscillation frequency is 30kHz if the external capacitor value is 390pF. The oscillation frequency is in inverse proportion to the value of a external capacitor. FUNCT IO N EXPL ANAT IO N (1). Ph inputs make a decision the output function. (3). Equivalent circuit of Vref terminal. The equivalent circuit of Vref terminal is shown in right circuit. As Vref terminal needs typical 500mA input current, consider this value when Vref voltage is set. (4). Current sensing comparators. The current sensing comparators compare the voltage (VR S) of current sensing resistor and threshold voltage (VCH ) of this comparators, then if VR S > V CH , the comparators output change and shut off the output. Ph*A L H H L Ph*B L L H H Out*A OFF H OFF L Out*B OFF L OFF H *: 1 or 2 The outputs shut off under Ph*A and Ph*B High condition at the same time. OUTPUT CIRCUIT (Ta = 25deg, VCC = 5.0V, VM = 24V unless otherwise noted.) Limits Min. Typ. Max.Symbol Conditions UnitsParameter Vsat Top and Bottom at Load current 0.6A. Ileak -100 1.6 2.2 +100 V mA Output saturation voltage Output leakage current VF(L) VF(H) — 1.7 1.1 2.3 1.5 If = 0.6A If = 0.6A VF of flywheel diode (Top) VF of flywheel diode (Bottom) V V tdoff tdon — 0.5 2.0 2.0 3.5 Time until output become ON since S > Vref Time until output become OFF since S < Vref Turn ON delay of output Turn OFF delay of output mS mS (2). Output current and terminal of output current setting. L H H L L L H H Output current ratio 100% 70% 30% Current sensing comparators threshold voltage (Vref=5V) 500mV 350mV 155mV Vref 18k 3.5k 0.68k 0.5V 2.5V

2-PHASE STEPPER MOTOR DRIVER M 54679FP MITSUBISHI <CONTROL / DRIVER IC> PRE LIM INARY Notice: This is not a final specification. Some parametric limits are subject to change. (10). Setting output current. As the output circuit of M54679FP is designed by the bipolar type NPN transistors, the current that go through the motor coil is smaller about 15mA (typical) than the current that go through the current sensing resistor. This is caused by the base current of the power transistors. Therefore, be aware this base current when the output current is set. (11). Power GND terminal. Power GND is connected the anodes of flywheel diodes of bottom side. When the output H-bridge power stage goes to ON, as the flyback current go through this GND terminal, minimize the wire resistor of this GND on the board. (6). Spike current cancellation. Output power transistors go to ON, then the spike current appears on the R S (current sensing) in a short time and this is caused by the internal delay time. M54679FP has the cancellation circuit of the spike current as the current sensing comparators do not cause error functions. So, the function of current sensing comparators are shut off during 2ms since the output power transistors go to ON. (7). Ph signal delay circuit. M54679FP has a delay time of 3.0ms until output H-bridge power stage go to ON since Ph signal change Low to high. This delay time is enough short time for the frequency (plus rate) of Ph signal and there is no problem in the normal function. (8). Rs and S1 or S2 terminal. If S1 or S2 terminal (non-inverted input of the current sensing comparators) is connected the nearest position of current sensing resistor, the error of the current sensing by means of wire resistance on the board will be decreased. (9). Voltage stabilizer. M54679FP has a voltage stabilizer of 3.5V. The reference voltage (Vref) can connect the output (Regout) of voltage stabilizer directly. In this case, the current capability of the output of voltage stabilizer is 1.0mA (source current), 0.1mA (sink current). OFF ON OFF ON R S Iout MBMA VM VCC Ib = 15mA (Typ.) Iout = IRS - Ib

2-PHASE STEPPER MOTOR DRIVER M 54679FP MITSUBISHI <CONTROL / DRIVER IC> PRE LIM INARY Notice: This is not a final specification. Some parametric limits are subject to change. (12). Output current timing chart under Ph inputs and I0, I1 output conditions. Under output current wave forms show the current that a motor driver is going to control, so these do not show the actual current wave forms. (1) (2) (3) (4) Ph1A Ph1B A B Ph2A Ph2B L L 100% 100% 100% 100% I0(1),I0(2) I1(1),I1(2) <4 steps function> Output current 1 (Current of Phase 1) Output current 2 (Current of Phase 2) B A A B (4) ABAB 100% Torque vector (1)(2) (3) AB B BA <8 steps function> A B B A 1 2 3 4 5 6 7 8 Ph1A Ph1B Ph2A Ph2B I0(1),I0(2) I1(1),I1(2) Output current 1 (Current of Phase 1) Output current 2 (Current of Phase 2) 123 45678 9 10 1211 13 14 15 16 <16 steps function> Output current 1 (Current of Phase 1) Output current 2 (Current of Phase 2) Ph1A Ph1B Ph2A Ph2B I0(1) I1(1) I0(2) I1(2) A B B A 234 10 11 31% 70% 100% 0% A B AB AB B BA AB A 70% 100% 5 7 A B AB AB B BA AB A

2-PHASE STEPPER MOTOR DRIVER M 54679FP MITSUBISHI <CONTROL / DRIVER IC> PRE LIM INARY Notice: This is not a final specification. Some parametric limits are subject to change. (13). Inputs terminals. Symbol Equivalent circuit of the circumstance of 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: S1 pin: S2 pin: Vref19 VCC VCC VCC I0(1) I1(1) VCC I0(2) I1(2)

2-PHASE STEPPER MOTOR DRIVER M 54679FP MITSUBISHI <CONTROL / DRIVER IC> PRE LIM INARY Notice: This is not a final specification. Some parametric limits are subject to change. Symbol Equivalent circuit of the circumstance of input terminals. Remarks Fref VCC Fref TH ERM A L D ERAT IN G 1.0 2.0 3.0 4.0 5.0 6.0 (watts) 0 25 50 75 100 125 150 Using J-type board 2.7 watts Power Dissipation (Pdp) Ambient Temperature (°C )

2-PHASE STEPPER MOTOR DRIVER M 54679FP MITSUBISHI <CONTROL / DRIVER IC> PRE LIM INARY Notice: This is not a final specification. Some parametric limits are subject to change. APP LICAT IO N CIRCUI T STEPPER MOTOR M Rrs2 VCC Rrs1 input input input input Vm Ph1A Ph1B RegoutVref VCC Rs1 Out1B Out1A P.GND GND Vm1 Ph2A Ph2B Vm2 Rs2 Out2A Out2B GND 18 25 M54679FP 21 22 I1(1) I0(1) I1(2) I0(2) Fref N.C N.C N.C Stbyinput input input 390pF input input