SI-7115B

Unipolar Driver ICs SI-7115B s Characteristics Parameter Applied voltage Type No. Vsurge(V) Absolute maximum rating Output current Io(A/ø) Junction temperature Tj(°C) Electrical characteristics Operating Storage Supply Output Input ambient temperature voltage current current temperature Vcc(V) Io(A) Iin(mA) Top(° C) Tstg(°C) min typ max min max min max Oscillation frequency Output f (kHz) current min max (A/ø) 0.2 SI-7115B 40 1.7 125 –20 to +80 –30 to +100 20 24 30 0.2 1.5 5.0 19 24 0.5 1.0 1.5 (Ta = 25 °C) Phase switching signal input ON OFF Input Input Input voltage current voltage (V)min (mA)min (V)max 2.7 3.1 3.6 4.5 1.0 1.2 1.4 2.0 0.8 s Block diagram VCC Reference voltage Rx Oscillator circuit Comparator amplifier Current controller M Counter EMF canceller Output current fine adjustment resistor Excitation signal (4-phase) Current detection resistor Excitation signal amplifier SI-7115B s Equivalent circuit diagram 18 Q1 6 9 7 10 8 Q3 RS1 11 1 + – + – s External connection diagram Q2 D5 D1 D2 D6 17 14 16 13 15 Q4 Q5 Q6 RS2 12 VCC D4 D3 18 Excitation signal input Active High A B A B 8 13 10 15 1 + – Rx b a 2 4 5 3 11 12 17 6 Stepper motor µF 2.2 10V SI-7115B 7 9 14 16 A A B B 4 Oscillator circuit 5 2 3 33 SI-7115B s External dimensions Plastic package Dimensions of SI-7115B pins 71.7±0.5 60.3±0.4 11.5±1 39.6±0.5 0.4 4.0 4 Type No. Lot No. 9.0±0.6 (Unit: mm) φ 3.4 8.0 Aluminum plate 11.5±1 0.5 P=2.54 43.2 1 2 3 18 Application Note s Determin...