L6228Q(2008) 데이터 시트보기 (PDF) - STMicroelectronics

부품명

상세내역

제조사

L6228Q
(Rev.:2008)

DMOS driver for bipolar stepper motor

STMicroelectronics 

L6228Q

DMOS driver for bipolar stepper motor

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

Figure 1. Block diagram

VFQFPN 5x5 32L

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.

VBOOT

VCP

EN

CONTROL

HALF/FULL

CLOCK

RESET

CW/CCW

VBOOT

CHARGE

PUMP

THERMAL

PROTECTION

OCDA

OCDB

STEPPING

SEQUENCE

GENERATION

January 2008

VOLTAGE

REGULATOR

10V 5V

VBOOT

VBOOT

VSA

OVER

CURRENT

DETECTION

10V

GATE

LOGIC

ONE SHOT

MONOSTABLE

OVER

CURRENT

DETECTION

GATE

LOGIC

Rev 1

OUT1A

OUT2A

10V

PWM

MASKING

TIME

+

SENSE

-

COMPARATOR

BRIDGE A

BRIDGE B

D01IN1225

SENSEA

VREFA

RCA

VSB

OUT1B

OUT2B

SENSEB

VREFB

RCB

1/32

www.st.com

32

Share Link: