February 1999
PBL 3776/1 Dual Controller IC for High Current Stepper Motor Applications
Description
The PBL 3776/1 is a switch-mode (chopper), constant-current controller IC intended for controlling external
transistors in a high current stepper motor application.
The IC has two channels one for each winding of a two-phase stepper motor.
The circuit is similar to Ericsson´s PBL 3775/1.
PBL 3776/1 is equipped with a Disable input to simplify half-stepping operation.
The PBL 3776/1 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...