L6228Q View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'L6228Q' PDF : 32 Pages View PDF
L6228Q
DMOS driver for bipolar stepper motor
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 half-
step drive
■ Cross conduction protection
■ Thermal shutdown
■ Undervoltage lockout
■ Integrated fast free wheeling diodes
Applications
■ Bipolar stepper motor
Figure 1. Block diagram
Datasheet − production data
VFQFPN32 5 mm x 5 mm
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.
VBOOT
VCP
EN
CONTROL
HALF/FULL
CLOCK
RESET
CW/CCW
VBOOT
CHARGE
PUMP
THERMAL
PROTECTION
OCDA
OCDB
STEPPING
SEQUENCE
GENERATION
VOLTAGE
REGULATOR
10V 5V
VBOOT
VBOOT
VSA
OVER
CURRENT
DETECTION
10V
GATE
LOGIC
ONE SHOT
MONOSTABLE
OVER
CURRENT
DETECTION
GATE
LOGIC
OUT1A
OUT2A
10V
PWM
MASKING
TIME
+
SENSE
-
COMPARATOR
BRIDGE A
BRIDGE B
D01IN1225
SENSEA
VREFA
RCA
VSB
OUT1B
OUT2B
SENSEB
VREFB
RCB
January 2013
This is information on a product in full production.
Doc ID 14321 Rev 5
1/32
www.st.com
32
Share Link: 
