描述 Description

The L6228Q is a DMOS fully integrated stepper motor driver with non-dissipative overcurrent protection, realized in BCDmultipower 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 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
? Undervoltage lockout
? Integrated fast free wheeling diodes

簡介

L6228Q屬于集成電路（IC）的電機(jī)驅(qū)動器控制器。由制造生產(chǎn)的L6228Q電機(jī)驅(qū)動器，控制器產(chǎn)品屬于電機(jī)驅(qū)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(jī)或相關(guān)機(jī)電執(zhí)行器的電源。所實(shí)現(xiàn)的具體功能和特性集根據(jù)預(yù)期負(fù)載和預(yù)期應(yīng)用的特性有很大差異，范圍從用于有刷電機(jī)的簡單開環(huán)速度控制到基于步進(jìn)電機(jī)的高級閉環(huán)運(yùn)動控制。