LB1845 Sanyo Semiconductor Corporation, LB1845 Datasheet
LB1845
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LB1845 Summary of contents
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... Ordering number: EN5505B Overview The LB1845 is a PWM current control type stepping motor driver that uses a bipolar drive scheme particularly suitable for driving carriage and paper feed stepping motors in printers and similar products. Features • PWM current control (fixed off time scheme) • ...
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... L H — OFF I0 I1 Output current ( REF E OUT ( REF E OUT ( REF E OUT Note: Outputs go off when ENABLE is high or in the high state. Pin Assignment LB1845 = Symbol Conditions OFF V (sat +1.0 A sink (sat +1.5 A sink (sat –1.0 A source (sat –1.5 A source (leak ...
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... Block Diagram Application Circuit Diagram LB1845 No. 5505-3/7 ...
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... Timing chart for pin switching operations during PWM drive toff: Output off time. Determined by external capacitor and resistor Ct and Rt. (toff = Ct td: Delay time between the point the set current is sensed at the SENSE pin and the point the output turns off. LB1845 Function Figure 1 Switching Waveforms Rt) No ...
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... PH1 I11 I01 Current value 2/3 LB1845 and V BB pin input impedance is 26 kΩ (±30%) when V REF Sink side Source side 10 µs 9 µs 1.5 µs 3 µs 9 µs 9 µs 1.5 µs 6.5 µs ENABLE1 = ENABLE2 = 0 Phase B PH2 I12 I02 Current value 2 2 ...
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... Composite Vector Diagram Figure 2 Composite Vector Diagram for the Sequence in Table 1 (1/4 cycle) LB1845 ENABLE1 = ENABLE2 = 0 Phase B PH2 I12 I02 Current value * 1/3 Figure 3 Composite Vector Diagram for the Sequence in Table 2 (1/4 cycle) No. 5505-6/7 ...
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... SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of December, 1996. Specifications and information herein are subject to change without notice. LB1845 No. 5505-7/7 ...