DESCRIPTION
The L6228 is a DMOS Fully Integrated Stepper Motor Driver with non-dissipative Overcurrent Protection, realized in MultiPower-BCD technology, which combines isolated DMOS Power Transistors with CMOS and bipolar circuits on the same chip. The device includes all the circuitry needed to drive a two-phase bipolar stepper motor including: a dual DMOS Full Bridge, the constant off time PWM Current Controller that performs the chopping regulation and the Phase Sequence Generator, that generates the stepping sequence.

■ OPERATING SUPPLY VOLTAGE FROM 8 TO 52V
■ 2.8A OUTPUT PEAK CURRENT (1.4A RMS)
■ RDS(ON) 0.73Ω TYP. VALUE @ Tj = 25°C
■ OPERATING FREQUENCY UP TO 100KHz
■ NON DISSIPATIVE OVERCURRENT PROTECTION
■ DUAL INDEPENDENT CONSTANT tOFF PWM CURRENT CONTROLLERS
■ FAST/SLOW DECAY MODE SELECTION
■ FAST DECAY QUASI-SYNCHRONOUS RECTIFICATION
■ DECODING LOGIC FOR STEPPER MOTOR FULL AND HALF STEP DRIVE
■ CROSS CONDUCTION PROTECTION
■ THERMAL SHUTDOWN
■ UNDER VOLTAGE LOCKOUT
■ INTEGRATED FAST FREE WHEELING DIODES

TYPICAL APPLICATIONS
■ BIPOLAR STEPPER MOTOR