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LB1945D Datasheet(PDF) 6 Page - Sanyo Semicon Device |
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LB1945D Datasheet(HTML) 6 Page - Sanyo Semicon Device |
6 / 9 page LB1945D No.7633-6/9 Truth Table ENABLE PHASE OUTA OUTA Low High High Low Low Low Low High High - OFF OFF I1 I2 Output current Low Low Vref/(10 × RE) = IOUT High Low Vref/(15 × RE) = IOUT × 2/3 Low High Vref/(30 × RE) = IOUT × 1/3 High High 0 Note: The output is turned off when ENABLE is high or in the I1 = I2 = high state. Clockwise/counterclockwise Operating Sequence 2-phase excitation drive Clockwise rotation IA1 = IA2 = IB1 = IB2 = 0 No. PHASE1 OUTA OUTA PHASE2 OUTB OUTB 0 0 0 1 0 0 1 1 1 1 0 0 0 1 2 1 1 0 1 1 0 3 0 0 1 1 1 0 Counterclockwise rotation IA1 = IA2 = IB1 = IB2 = 0 No. PHASE1 OUTA OUTA PHASE2 OUTB OUTB 0 0 0 1 1 1 0 1 1 1 0 1 1 0 2 1 1 0 0 0 1 3 0 0 1 0 0 1 Control Sequence 2-phase excitation Table 1 ENABLE1 = ENABLE2 = 0 Phase A Phase B NO PH1 IA2 IA1 Current value PH2 IB2 IB1 Current value 0 0 0 0 1 0 0 0 1 1 1 0 0 1 0 0 0 1 2 1 0 0 1 1 0 0 1 3 0 0 0 1 1 0 0 1 1-2 phase excitation - 1/2 step Table 2 ENABLE1 = ENABLE2 = 0 Phase A Phase B No. PH1 IA2 IA1 Current value PH2 IB2 IB1 Current value 0 0 0 0 1 * 1 1 0 1 0 0 1 2/3 0 0 1 2/3 2 * 1 1 0 0 0 0 1 3 1 0 1 2/3 0 0 1 2/3 4 1 0 0 1 * 1 1 0 5 1 0 1 2/3 1 0 1 2/3 6 * 1 1 0 1 0 0 1 7 0 0 1 2/3 1 0 1 2/3 |
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