L6228Q屬于集成電路（IC）的電機驅動器控制器。由意法半導體集團制造生產(chǎn)的L6228Q電機驅動器，控制器產(chǎn)品屬于電機驅動器和控制器電源管理集成電路 (PMIC) 系列，可用于控制或操作從某電源施加到電機或相關機電執(zhí)行器的電源。所實現(xiàn)的具體功能和特性集根據(jù)預期負載和預期應用的特性有很大差異，范圍從用于有刷電機的簡單開環(huán)速度控制到基于步進電機的高級閉環(huán)運動控制。

描述 Description

The L6228Q is a DMOS fully integrated stepper motor driver with non-dissipative overcurrent protection, realized in BCD multipower 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 VFQFPN32 5 mm x 5 mm package, the L6228Q features a non-dissipative overcurrent protection on the high-side power MOSFETs and thermal shutdown.

特性 Features

■ Operating supply voltage from 8 to 52 V

■ 2.8 A output peak current (1.4 Ar.m.s.)

■ 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 halfstep drive

■ Cross conduction protection

■ Thermal shutdown

■ Undervoltage lockout

■ Integrated fast free wheeling diodes

Applications

■ Bipolar stepper motor