描述 Description

The STSPIN948 is a 4.5 A dual full-bridge driver for brushed DC motors or bipolar stepper motors.

The power stage is designed with high dynamic performance, allowing to achieve high frequency PWM control with precise duty-cycle.

Each full-bridge is totally independent with a current limiter with adjustable threshold and OFF-time with slow or mixed decay selection. Two amplifiers with fixed amplification factor are available for current sensing (using an external shunt resistor).

The adjustable slew-rate guarantees the best trade-off between performances and EMI.

Versatile power stage offers several ways of operation for a high level of flexibility.

The device offers a complete set of protection features including overcurrent, overtemperature, and low bus voltage detection.

特性 Features

? Operating voltage up to 58 V
? Maximum output current up to 4.5 Arms
? Five driving methods with full-bridge and dual half-bridge parallel mode
? RDS(ON) HS + LS = 0.36 ? typ.
? Adjustable power MOS slew rate
? Integrated amplifiers with two different embedded current control techniques
? Adjustable OFF-time with slow or mixed decay
? Low consumption standby
? Protections
?UVLO
?Overcurrent protection
?Thermal shutdown