NJM3776D2 Datasheet | New Japan Radio

DESCRIPTION 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 mon for both driver channels, a set of parators 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 Hbridge. Voltage supply requirements are +5 V for logic and +10 to +45 V for the outputs. s PACKAGE OUTLINE NJM3776D2 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 ponents - Package DIP24 s BLOCK DIAGRAM Phase 1 Dis 1 VR1 C1 SGND 1 Pwr GND 1 1 NJM3776 V CC - + Logic Figure 1. Block diagram + - Logic + - Phase 2 Dis2 VR2 C2 SGND 2 Pwr GND 2 T1BL T1AL T1AU T1BU VBB1 VBB2 T2BU T2AU T2AL T2BL s PIN CONFIGURATION NJM3776 Figure 2. Pin configuration PWR GND 1 1 T1BL 2 24 PWR GND 2 23 T2BL T1BU 3 22...