NJM3777E3 NJR, NJM3777E3 Datasheet
NJM3777E3
Specifications of NJM3777E3
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NJM3777E3 Summary of contents
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... Digital filter on chip eliminates external filtering components • Package EMP24(Batwing) BLOCK DIAGRAM NJM3777 Figure 1. Block diagram DUAL STEPPER MOTOR DRIVER Phase Dis – – – Phase Dis V C GND NJM3777 PACKAGE OUTLINE NJM3777E3 Logic B1 V MM1 V MM2 M B2 Logic ...
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PIN CONFIGURATION Figure 2. Pin configuration PIN DESCRIPTION EMP Symbol Description 1 NC Not connected 2 M Motor output B, channel 1. Motor current flows from Common emitter, channel 1. This pin connects to a sensing ...
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FUNCTIONAL DESCRIPTION Each channel of the NJM3777 consists of the following sections: an output H-bridge with four transistors and four recirculation diodes, capable of driving up to 800 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 GND Power ...
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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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... Be sure not to exceed the S 0 MM1 MM2 Phase 1 Dis NJM3777E3 Phase 2 Dis GND 18 0.47 0. Sign Phase Dis NJU39612E2 NJM3777E3 18 15 Phase Sign Dis GND 18 k‰ 4700 pF NJM3777 , a 2.5 V reference voltage will produce an output 0 STEPPER E 2 MOTOR 22 Pin numbers refer to EMP package. GND ( 0 ...
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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 out- put current to zero. V (Reference) inputs R The Vref inputs of the ...
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Full-step mode Both windings are energized at all the time with the same current, I current direction (and the magnetic field direction) in one phase is reversed. The next step is then taken when the other phase current reverses. The ...
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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 ...