A3957SLB

The A3957SLB is designed as the full-bridge pwm microstepping motor driver that designed for driving one winding of a bipolar stepper motor in a micros-tepping mode and the microstepping provides for increased step resolution, and reduces torque variations and resonance problems at low speed.Internal circuit protection includes thermal shutdown with hysteresis, transient-suppression diodes, and crossover current protection. Special power-up sequencing is not required.

Features of the A3957SLB are:(1)±1.5 a continuous output current; (2)50 v output voltage rating; (3)internal pwm current control; (4)4-bit non-linear dac for 16-bit microstepping; (5)satlington. sink drivers; (6)fast, mixed fast/slow, and slow current-decay modes; (7)internal transient-suppression diodes; (8)internal thermal-shutdown circuitry; (9)crossover-current and uvlo protection.

The absolute maximum ratings of the A3957SLB can be summarized as:(1)load supply voltage, VBB:50 V;(2)output current, Iout (continuous):±1.5 A;(3)logic supply voltage, Vcc:7.0 V;(4)logic/reference input voltage range:-0.3 V to Vcc+0.3 V;(5)sense voltage:1.0 V;(6)operating temperature range:-20°C to +85°C;(7)junction temperature:+150°C;(8)storage temperature range:-55°C to +150°C.If you want to know more information such as the electrical characteristics about the A3957SLB,please download the datasheet in www.seekic.com or www.chinaicmart.com .