L6228Q(2008) Datasheet PDF - STMicroelectronics

Description
The L6228Q 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. Available in VFQFPN-32 5x5 package, the L6228Q features a non-dissipative overcurrent protection on the high side Power MOSFETs and thermal shutdown.

FEATUREs
■ Operating supply voltage from 8 to 52 V
■ 2.8A output peak current (1.4 A RMS)
■ RDS(ON) 0.73 Ω typ. value @ TJ = 25 °C
■ Operating frequency up to 100 kHz
■ 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

APPLICATIONs
■ Bipolar stepper motor