■ GENERAL DESCRIPTION
The NJM3777 is a switch-mode (chopper), constant-current driver with two channels: one for each winding of a two-phase stepper motor. The NJM3777 is equipped with a Disable input to simplify half-stepping operation. The NJM3777 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 H-bridges, including recirculation diodes. Voltage supply requirements are + 5 V for logic and + 10 to + 45 V for the motor. Maximum output current is 900mA per channel.

■ FEATURES
• Dual chopper driver
• 900 mA continuous output current per channel
• Digital filter on chip eliminates external filtering components
• Package       EMP24(Batwing)