SI-7500A

5-phase Stepper Motor Star Connection Unipolar Driver IC SI-7500A s Ratings Absolute maximum rating Type No. SI-7500A Supply voltage (V) VCC 40 Vb 8 Output current (A) Io 1.2 Junction temperature (°C) Tj +125 Operating ambient temperature (°C) Top –20 to +80 (Ta = 25 °C) Storage temperature (°C) Tstg –30 to +100 s Characteristics Electrical characteristics Vb input External *Input voltage *Input current zener diode current breakdown voltage (V) (mA/ø) (%) (mA) (V) (V) (mA) VCC Vb IO I OPD/IO Ib VZ V IH1 V IH2 VIL IIH1 I IH2 min typ max min typ max min typ max min typ max max min max max max max max max 17 24 30 4.5 5 5.5 200 750 1000 35 50 100 15 VCC x1.5 50 3.9 1.3 0.6 0.21 0.22 Operating supply voltage Output current Power down Ratio Trigger pulse voltage (V) Vtrig min max 4.0 Vb Trigger pulse time (Ta = 25 °C) Trigger pulse frequency (kHz) Ftrig typ max 20 25 Type No. SI-7500A (µ s) Ttrig min typ 1.0 2.0 s Block diagram Main power supply VCC Auxiliary power supply Vb Variable current resistor Excitation signal 2-3 phase excitation Reference voltage Comparator amplifier Current controller Excitation signal amplifier Zener diode for canceling counter EMF ZD Rx Trigger pulse generator circuit M Counter EMF Canceller * Input voltage and input current conditions VIH1 : Vb = 5V, Q1 to Q5ON RX = , I IN = 0.2mA VIH2 : Vb = 5V, Q1 to Q5OFF, IIN = 0.22mA IIH1 : Vb = 5V, Q1 to Q5ON, VIN = 3.7V IIH2 : Vb = 5V, Q1 to Q5OFF, VIN = 0.9V SI-7500A Current detection resistor Rs...