L6228N STMicroelectronics

L6228 DMOS driver for bipolar stepper motor Datasheet - production data Decoding logic for stepper motor full and half step drive Cross conduction protection Thermal shutdown Undervoltage lockout Integrated fast freewheeling diodes 3 2 RZHU6 Application Bipolar stepper motor Description The L6228 device is a DMOS fully integrated stepper motor driver with non-dissipative overcurrent protection, realized in BCD technology, which combines isolated DMOS power transistors with CMOS and bipolar circuits 62 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 V PEHU J QX HULQ 2UG performs the chopping regulation and the phase ,3 ZHU 1 3R / sequence generator, that generates the stepping 62 RZHU 3 3 / sequence. Available in PowerSO36 and SO24 62 / (20 + 2 + 2) packages, the L6228 device features a non-dissipative overcurrent protection on the high-side power MOSFETs and thermal shutdown. Features Operating supply voltage from 8 to 52 V 2.8 A output peak current (1.4 A RMS) R 0.73 typ. value at T = 25 C DS(ON) j Operating frequency up to 100 KHz Non-dissipative overcurrent protection Dual independent constant t PWM current OFF controllers Fast/slow decay mode selection Fast decay quasi-synchronous rectification October 2018 DocID9454 Rev 3 1/34 This is information on a product in full production. www.st.comContents L6228 Contents 1 Block diagram 3 2 Maximum ratings 4 3 Pin connections . 6 4 Electrical characteristics . 9 5 Circuit description 13 5.1 Power stages and charge pump 13 5.2 Logic inputs . 14 6 PWM current control 15 7 Decay modes 19 7.1 Stepping sequence generation . 20 7.2 Half step mode . 20 7.3 Normal drive mode (full step two phase on) . 20 7.4 Wave drive mode (full step one phase on) 20 7.5 Non-dissipative overcurrent protection . 21 7.6 Thermal protection 24 8 Application information . 25 8.1 Output current capability and IC power dissipation . 26 8.2 Thermal management . 28 9 Package information 30 9.1 PowerSO36 package information . 30 9.2 SO24 package information 32 10 Revision history . 33 2/34 DocID9454 Rev 3