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NJM3776 Datasheet(PDF) 1 Page - New Japan Radio |
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NJM3776 Datasheet(HTML) 1 Page - New Japan Radio |
1 / 9 page NJM3776 Figure 1. Block diagram RC NJM3776 V CC V CC S R Q Logic S R Q + – + – + – Logic VR2 VBB1 T1BU Phase 2 Phase 1 Dis2 C2 SGND 2 Pwr GND 2 1BL T 1AU T 1AL T BB2 V T2BU 2AU T 2AL T 2BL T VR1 Dis 1 C1 SGND 1 Pwr GND 1 1 DUAL CONTROLLER FOR HIGH-CURRENT STEPPER MOTOR s FEATURES • Suitable to drive any external MOS FET or bipolar power transistor • Cross conduction prevented by time delay • Digital filter on chip eliminates external filtering components • Package DIP24 s BLOCK DIAGRAM The NJM3776 is a switch-mode (chopper), constant-current controller intended for controlling external transistors in a high current stepper motor application. The NJM3776 has two channels, one for each winding of a two-phase stepper motor. The NJM3776 is equipped with a Disable input to simplify half stepping operation. The NJM3776 contains a clock oscillator, which is common for both driver channels, a set of comparators and flip-flops implementing the switching control, and two output sections each containing four outputs, two source and two sink, intended to drive an external H- bridge. Voltage supply requirements are +5 V for logic and +10 to +45 V for the outputs. s GENERAL DESCRIPTION s PACKAGE OUTLINE NJM3776D2 |
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