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STMicroelectronics - DMOS DRIVER FOR BIPOLAR STEPPER MOTOR

Numéro de référence L6228
Description DMOS DRIVER FOR BIPOLAR STEPPER MOTOR
Fabricant STMicroelectronics 
Logo STMicroelectronics 





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L6228 fiche technique
L6228
DMOS DRIVER FOR BIPOLAR STEPPER MOTOR
s OPERATING SUPPLY VOLTAGE FROM 8 TO 52V
s 2.8A OUTPUT PEAK CURRENT (1.4A RMS)
s RDS(ON) 0.73TYP. VALUE @ Tj = 25°C
s OPERATING FREQUENCY UP TO 100KHz
s NON DISSIPATIVE OVERCURRENT
PROTECTION
s DUAL INDEPENDENT CONSTANT tOFF PWM
CURRENT CONTROLLERS
s FAST/SLOW DECAY MODE SELECTION
s FAST DECAY QUASI-SYNCHRONOUS
RECTIFICATION
s DECODING LOGIC FOR STEPPER MOTOR
FULL AND HALF STEP DRIVE
s CROSS CONDUCTION PROTECTION
s THERMAL SHUTDOWN
s UNDER VOLTAGE LOCKOUT
s INTEGRATED FAST FREE WHEELING DIODES
TYPICAL APPLICATIONS
s BIPOLAR STEPPER MOTOR
DESCRIPTION
The L6228 is a DMOS Fully Integrated Stepper Motor
Driver with non-dissipative Overcurrent Protection,
realized in MultiPower-BCD technology, which com-
BLOCK DIAGRAM
PowerDIP24
(20+2+2)
PowerSO36
SO24
(20+2+2)
ORDERING NUMBERS:
L6228N (PowerDIP24)
L6228PD (PowerSO36)
L6228D (SO24)
bines isolated DMOS Power Transistors with CMOS
and bipolar circuits on the same chip. The device in-
cludes 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 PowerDIP24 (20+2+2),
PowerSO36 and SO24 (20+2+2) packages, the
L6228 features a non-dissipative overcurrent protec-
tion on the high side Power MOSFETs and thermal
shutdown.
VBOOT
VCP
EN
CONTROL
VBOOT
CHARGE
PUMP
THERMAL
PROTECTION
OCDA
OCDB
OVER
CURRENT
DETECTION
GATE
LOGIC
VBOOT
10V
VBOOT
10V
VSA
OUT1A
OUT2A
SENSEA
HALF/FULL
CLOCK
RESET
CW/CCW
STEPPING
SEQUENCE
GENERATION
VOLTAGE
REGULATOR
10V 5V
ONE SHOT
MONOSTABLE
OVER
CURRENT
DETECTION
GATE
LOGIC
PWM
MASKING
TIME
+
SENSE
-
COMPARATOR
BRIDGE A
BRIDGE B
VREFA
RCA
VSB
OUT1B
OUT2B
SENSEB
VREFB
RCB
D01IN1225
September 2003
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
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