This data sheet provides information on the maximum operating voltage, output current, logic supply voltage, logic/reference input voltage range, load supply voltage, package power dissipation, operating temperature range, junction temperature range and storage temperature range of A3955SB and A3955SLB.
The document provides a comprehensive technical overview of the A3955SB (DIP) and A3955SLB (SOIC) devices, which are designed to drive one winding of a bipolar stepper motor in microstepping modes. These electrically identical chips feature internal PWM current control combined with a three-bit nonlinear digital-to-analog converter.
| Load Supply Voltage (V BB) | 50 V |
|---|---|
| Output Current (Continuous) | ±1.5 A |
| Logic Supply Voltage (V CC) | 7.0 V |
| Operating Temperature Range | -20˚C to +85˚C |
| Junction Temperature (Max) | +150˚C |
The device is supplied in a 16-pin dual-in-line plastic package (suffix 'B') and a 16-lead plastic SOIC with copper heat-sink tabs (suffix 'LB').
The device allows motor current control in full-, half-, quarter-, or eighth-step (microstepping) modes.
The thermal shutdown activates at a junction temperature of 165˚C.