PBL3772

The PBL3772 is designed as one kind of a switch-mode (chopper), constant-current driver IC with two channels, one for each winding of a two-phase stepper motors. 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 1A continuously per channel. At 2x750mA output current, power dissipation is only 1.8W.

PBL3772 has seven features. (1)Dual chopper driver in a single package. (2)0°C to 85°C operation. (3)1.0A continuous output current per channel. (4)Very low power dissipation, 1.8W at 2x750mA output current. (5)Close matching between channels for high microstepping accuracy. (6)Specially matched to the dual DAC PBM 3960. (7)Plastic 22-pin batwing DIP package or 28-pin PLCC with lead-frame for heat-sinking through PC board copper. Those are all the main features.

Some absolute maximum ratings of PBL3772 have been concluded into several points as follow. (1)Its logic supply would be min 0V and max 7V. (2)Its motor supply would be min 0V and max 45V. (3)Its output stage supply would be min 0V and max 45V. (4)Its logic inputs would be min -0.3V and max 6V. (5)Its comparator inputs would be min -0.3V and max Vcc. (6)Its reference inputs would be min -0.3V and max 7.5V. (7)Its motor output current would be min -1200mA and max +1200mA. (8)Its logic inputs would be min -10mA. (9)Its analog inputs would be -10mA. (10)Its junction temperature would be max 150°C. (11)Its storage temperature range would be from -55°C to 150°C. It should be noted that stresses above those listed in absolute maximum ratings may cause permanent damage to device.

Also some electrical characteristics of PBL3772 are concluded as follow. (1)Its supply current would be typ 60mA and max 75mA. (2)Its total power dissipation would be typ 1.8W and max 2.1W. (3)Its thermal shutdown junction temperature would be typ 160°C. (4)Its turn-off delay would be typ 1.4us and max 2.0us. (5)Its input high voltage would be min 2.0V. (6)Its input low voltage would be max 0.8V. And so on. If you have any question or suggestion or want to know more information please contact us for details. Thank you!