NJM3775FM2 NJR, NJM3775FM2 Datasheet
NJM3775FM2
Specifications of NJM3775FM2
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NJM3775FM2 Summary of contents
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... Digital filter on chip eliminates external filtering components • Packages DIP22 / PLCC28 / EMP24(batwing) BLOCK DIAGRAM NJM3775 Figure 1. Block diagram DUAL STEPPER MOTOR DRIVER Phase Dis — — — Dis Phase V C GND NJM3775 PACKAGE OUTLINE NJM3775E3 NJM3775D2 NJM3775FM2 Logic B1 V MM1 V MM2 M B2 Logic ...
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... Phase Dis when Phase is HIGH when Phase is HIGH NJM3775 MM2 GND NJM3775FM2 GND GND Phase 2 Dis when Phase ground when Phase A1 B1 and V should be connected together. MM1 MM2 and M . Motor current flows from and a 4 700 pF capacitor to ground CC and M . Motor current flows from M ...
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FUNCTIONAL DESCRIPTION Each channel of the NJM3775 consists of the following sections: an output H-bridge with four transistors and four recirculation diodes, capable of driving up to 750 mA continuous current to the motor winding, a logic section that controls ...
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ABSOLUTE MAXIMUM RATINGS Parameter Voltage Logic supply Motor supply Logic inputs Analog inputs Current Motor output current Logic inputs Analog inputs Temperature Operating junction temperature Storage temperature Power Dissipation (Package Data) Power dissipation +25 C, DIP and ...
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ELECTRICAL CHARACTERISTICS Electrical characteristics over recommended operating conditions, unless otherwise noted Parameter General Supply current Supply current Total power dissipation Total power dissipation Thermal shutdown junction temperature Turn-off delay Logic Inputs Logic HIGH input voltage Logic LOW ...
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APPLICATIONS INFORMATION Current control The regulated output current level to the motor winding is determined by the voltage at the reference input and the value of the sensing resistor expressed as 0.1• [A] M,peak ...
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Current sense filtering At turn-on a current spike occurs, due to the recovery of the recirculation diodes and the capacitance of the motor winding. To prevent this spike from reseting the flip-flops through the current sensing comparators, the clock oscillator ...
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Dis (Disable) inputs A logic HIGH on the Dis inputs will turn off all four transistors of the output H-bridge, which results in a rapidly decreasing output current to zero. V (Reference) inputs R The Vref inputs of the NJM3775 ...
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Full-step mode. Both windings are energized at all the time with the same current, I direction (and the magnetic field direction) in one phase is reversed. The next step is then taken when the other phase current reverses. The current ...
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TYPICAL CHARACTERISTICS P (W) D 3.0 2.0 1 0.20 0.40 0.60 0.80 I (A) M Figure 10. Power dissipation vs. motor current ( 1.2 1.0 0.8 0.6 0.4 0 ...