M54678FP 2-Phase Stepper Motor Driver REJ03F0046-0100Z Rev.1.0 Sep.19.2003 Description The M54678FP is a semiconductor integrated circuit designed for stepper motor driver used to printer, PPC and facsimile. Features • • • • • • Wide supply voltage range (10 – 35V) Output current is controlled by PWM operation Few external components (This IC can be operated with 1 capacitor and 2 resistances) Voltage stabilizer circuit (Regout = 3.5V) Thermal protection circuit Flywheel diode Application Printers, PPC, facsimile Function The M54678FP is a integrated circuit which can drive two phase stepper motor. The output current direction is determined by phase terminal function, and the output current level is controlled by Vref terminals voltage. Rev.1.0, Sep.19.2003, page 1 of 8 M54678FP Pin Configuration P.GND 1 36 N.C 2 35 Out2 3 34 Out2B Rs1 4 33 Rs2 S1 5 32 S2 Vm 6 31 Vm 7 30 8 29 9 GND 10 11 M54678FP Out1 Out1B 28 GND 27 26 12 25 N.C 13 24 N.C VCC 14 23 N.C Ph1 15 22 Ph2 En1 16 21 En2 Vref1 17 20 Vref2 Regout 18 19 Fref Outline 36P2R-D N.C: no connection Block Diagram Out1 Out1B Vm Out2 Out2B Ph1 Ph2 En1 En2 Delay Delay P.GND VCC P.GND Spike current cancel Current comp1 Delay Source PWM Logic Logic Logic Source PWM Logic Delay R Q FF1 S Q R FF2 S Frequency Generator Spike current cancel Regulator(3.5V) 1.25V Current comp2 VTH 10K Regout 18K VTL VTM Rs1 S1 Vref1 Rev.1.0, Sep.19.2003, page 2 of 8 Fref Vref2 S2 Rs2 GND M54678FP Pin Function Terminal Symbol Functions Output stage supply voltage Vm Power supply for motor working Output terminal Out1, Out1B, Out2, Out2B Motor drive output terminal Current sensor Power supply Rs1,Rs2 VCC Output current sensing resistor (Rs) connect terminal Control circuit power supply Phase input Enable input Ph1, Ph2 En1, En2 Output current direction switch “L” input → Motor on “H” input → Enable Sense input Vref input S1, S2 Vref1, Vref2 Comparator input voltage terminal Comparator reference voltage terminal Voltage stabilizer output Regout Constant voltage output (Vout = 3.5V) Absolute Maximum Ratings (Ta = 25°C unless otherwise noted.) Parameter Symbol Ratings Unit Output stage supply voltage Vm -0.3 – 37 V Condition Output current Iout ±1.0 A 1 phase Supply voltage Logic input voltage VCC Vlogic -0.3 – 7 -0.3 – VCC V V Ph, En Pin Analog input voltage Current sensor voltage Vanalog VRs -0.3 – VCC 1.5 V V Vref, S Pin Rs Pin Power dissipation Pd 2.0 W Thermal derating Kθ 6.25 °C/W 100mm × 100mm, t = 1.6mm glassfiber epoxy resin circuit board 100mm × 100mm, t = 1.6mm glassfiber epoxy resin circuit board Junction temperature Operating temperature Tj Topr 150 -20 – 75 °C °C Storage temperature Tstg -40 – 125 °C Recommended Operating Conditions Limits Parameter Symbol Min. Typ. Max. Supply voltage Vcc 4.5 5.0 5.5 V Output stage supply voltage Vm 10 35 V Output current Logic input rise time Iout tPLH 50 800 2 mA µS Logic input fall time PWM on time tPHL Ton 5 2 50 µS µS PWM off time Thermal shutdown temperature Toff TSDon 5 160 50 µS °C Rev.1.0, Sep.19.2003, page 3 of 8 Unit M54678FP Electrical characteristics (Ta = 25°C, VCC = 5.0V, VM = 24V unless otherwise noted.) Control Circuit Limits Parameter Symbol Min. Typ. Max. Unit Conditions Supply current ICC1 ICC2 19 34 33 58 50 87 mA VCC = 5V, En = H VCC = 5V, En = L Logic input voltage (Ph, En terminal) VIH VIL 2.4 0 Vcc 0.6 V Logic input current (Ph, En terminal) IIH IIL –5 –20 5 5 µA Vin = 5V Vin = 0V Comparator input offset voltage Comparator input current IC –5 +1 +7 mV Vref = 500mV, VCH = Vref-S IC –20 –5 µA S terminal input current S = 0V, Vref = 500mV Comparator input voltage range Vref input current VC 0 1.5 V Iref –20 –5 µA Vref input voltage range Fref terminal output voltage Vref FrefH 0 2.4 2.5 1.5 2.6 V V Fref terminal Fref oscillation frequency FrefL FC 0.4 20 0.5 30 0.6 40 kHz Fref terminal, C = 390pF Regulator output voltage Vreg 3.4 3.5 3.6 V Iout = -0.1mA – +1mA Vref terminal input current Vref = 0V, 2 = 500mVÅj Output Circuit (Ta = 25°C, VCC = 5.0V, VM = 24V unless otherwise noted.) Limits Parameter Symbol Min. Typ. Max. Unit Conditions Output saturation voltage Output leak current Vsat Ileak –100 1.8 2.6 +100 V µA Sensing resistor not included. Io = 0.75A Output turn-on delay Output turn-off delay tdon tdoff 0.5 2.0 2.0 3.5 µS µS Time until output on after Fref 2.5V → 0.5V Time until output off after S < Vref Application Directions (1) Ph input, En input determines output function. Ph*A Ph*B Out*A Out*B H L L L H L L H H L H H Z Z Z Z *: 1 or 2 Z : High impedance Rev.1.0, Sep.19.2003, page 4 of 8 M54678FP (2) Vref (reference voltage) Output current level is controlled by Vref voltage. (3) Current comparator Under VRS (current sensing resistor voltage) > Vref (reference voltage) condition, the current comparator switches, fip-flop is reset and output circuit is set to off. (4) Oscillating circuit Frequency of PWM operation synchronize with Fref terminal frequency. If you change frequency of PWM operation, please change capacitor value of Fref terminal. This IC is designed oscillating frequency to be 30kHz when capacitor = 390pF is connected to Fref terminal. Oscillating frequency is inversely proportional to capacitor value. When capacitor value become half, Oscillating frequency will be two times. (5) Spike current cancellation circuit This IC includes Spike cancellation circuit to prevent the failure function of current comparator by influence of this spike current. Thus, current comparator don’t function during approximately 2mS from the moment of output transistor is set to on. (6) Phase delay circuit This IC includes Phase delay circuit to prevent output through current at Ph switching time. Four output transistors of H bridge don’t function during approximately 3mS at Ph switching time. (7) Rs terminal and S terminal Difference of current sensing that caused by wiring resistance of board (wiring resistance between RS terminal and current sensing resistor) can be prevented by connecting S terminal (plus input of current comparator) to current sensing resistor as close as possible. (8) Voltage stabilizer circuit This IC includes voltage stabilizer circuit. (3.5volts output). Vref reference voltage can be generated by resistance potential dividing from constant voltage output terminal (Regout). Current capability of constant voltage output terminal is I source = +1mA, I sink = -0.1mA (9) Setting of output current Since output circuit of this IC consists of NPN type transistor, current flow through the motor coil (Iout) becomes approximately 20mA (typical value) smaller than current flow through the current sensing resistor (IRS) by influence of the base current (Ib) of transistor. Thus, please consider this current when you set up output current. VM ON OFF Iout VCC MB MA ON Ib = 10mA (Typ.) OFF RS Iout = IRS - Ib *If Vcc, Tj and manufacturing dispersion are considered, dispersion of Ib will vary maximum ±5mA (minimum = 5mA, maximum = 15mA) Rev.1.0, Sep.19.2003, page 5 of 8 M54678FP Thermal Derating With infinite heat sink Power Dissipation Pdp (W) 5.0 Mounted on circuit board (*1) 4.5 4.0 Without heat sink 3.0 2.0 1.2 1.0 0 25 50 75 100 125 Ambient Temperature Ta (°C) (*1): Mounted on 100mm × 100mm, t = 1.6µm (copper foil = 35µm) circuit board Rev.1.0, Sep.19.2003, page 6 of 8 150 M54678FP Application Circuit STEPPER MOTOR M Rrs1 Vm 1 P.GND 2 Out1 3 Out1B 4 N.C 36 Out2 35 Out2B 34 Rs1 Rs2 33 5 S1 S2 32 6 Vm1 Vm2 31 30 8 29 9 10 GND 11 M54678FP 7 An example of the setting Rrs1, Rrs2 = 0.5 – 1.0Ω Cfref = 390pF 28 GND 27 26 12 Vcc Rrs2 25 13 N.C N.C 24 14 Vcc N.C 23 input 15 Ph1 Ph2 22 input input 16 En1 input 17 Vref1 18 Regout 3.5V En2 21 Vref2 20 Fref 19 Cfref Rev.1.0, Sep.19.2003, page 7 of 8 G Z1 e 1 36 z Detail G D y JEDEC Code — MMP HE b 18 19 Weight(g) 0.53 Detail F A2 A Lead Mater ial Cu Allo y L1 EIAJ P a c kage Code SSOP36-P-450-0.80 E Rev.1.0, Sep.19.2003, page 8 of 8 c A1 F L A A1 A2 b c D E e HE L L1 z Z1 y Symbol e1 b2 e1 I2 b2 Dimension in Millimeters Min Nom Max — — 2.35 0 0.1 0.2 2.05 — — 0.3 0.35 0.45 0.18 0.2 0.25 14.8 15.0 15.2 8.2 8.4 8.6 — 0.8 — 11.63 11.93 12.23 0.3 0.5 0.7 — 1.765 — — — 0.7 — 0.85 — — — 0.15 0˚ 8˚ — 0.5 — — — 11.43 — 1.27 — — Recommended Mount Pad e Plastic 36pin 450mil SSOP I2 36P2R-D M54678FP Package Dimensions Sales Strategic Planning Div. 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