Description
The PBL 3772 is a switch-mode (chopper), constant-current driver IC with two chan-nels, one for each winding of a two-phase stepper motor. The circuit is similar to Ericsson´s PBL 3771, but has been designed to generate a minimum amount of power dissipation and can deliver substantially more current to the stepper motor, up to 1 A continuously per channel. At 2 x 750 mA output current, power dissipation is only 1.8 W.

Key Features
• Dual chopper driver in a single package.
• 0°C to +85°C operation.
• 1.0 A continuous output current per channel.
• Very low power dissipation, 1.8 W at 2 x 750 mA output current.
• Close matching between channels for high microstepping accuracy.
• Specially matched to the Dual DAC PBM 3960.
• Plastic 22-pin batwing DIP package or 28-pin power PLCC with lead-frame for heat-sinking through PC board copper.