L6258E View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'L6258E' PDF : 31 Pages View PDF
L6258E
PWM CONTROLLED - HIGH CURRENT
DMOS UNIVERSAL MOTOR DRIVER
s ABLE TO DRIVE BOTH WINDINGS OF A
BIPOLAR STEPPER MOTOR OR TWO DC
MOTORS
s OUTPUT CURRENT UP TO 1.2A EACH
WINDING
s WIDE VOLTAGE RANGE: 12V TO 40V
s FOUR QUADRANT CURRENT CONTROL,
IDEAL FOR MICROSTEPPING AND DC
MOTOR CONTROL
s PRECISION PWM CONTROL
s NO NEED FOR RECIRCULATION DIODES
s TTL/CMOS COMPATIBLE INPUTS
s CROSS CONDUCTION PROTECTION
s THERMAL SHUTDOW
DESCRIPTION
L6258E is a dual full bridge for motor control applica-
tions realized in BCD technology, with the capability
of driving both windings of a bipolar stepper motor or
bidirectionally control two DC motors.
POWERSO36
ORDERING NUMBER: L6258E
L6258E and a few external components form a com-
plete control and drive circuit. It has high efficiency
phase shift chopping that allows a very low current
ripple at the lowest current control levels, and makes
this device ideal for steppers as well as for DC mo-
tors.The power stage is a dual DMOS full bridge ca-
pable of sustaining up to 40V, and includes the
diodes for current recirculation.The output current ca-
pability is 1.2A per winding in continuous mode, with
peak start-up current up to 1.5A. A thermal protection
circuitry disables the outputs if the chip temperature
exceeds the safe limits.
BLOCK DIAGRAM
VCP1
VREF1
I3_1
I2_1
I1_1
I0_1
PH_1
VDD(5V)
VREF1
I3_2
I2_2
I1_2
I0_2
PH_2
TRI_CAP
CFREF
CP
CHARGE
PUMP
DAC
RC2
CC2
VCP2
EA_IN2
EA_OUT2
INPUT
&
SENSE
AMP
TRI_0
+
C
VR
ERROR
+ AMP
-
+
-
TRI_180 C
-
VR GEN
VR (VDD/2)
THERMAL
PROT.
DAC
INPUT
&
SENSE
AMP
TRIANGLE
GENERATOR
TRI_0
TRI_180
VR
ERROR
+ AMP
-
TRI_0
+
C
-
+
C
-
TRI_180
CBOOT
VS
VBOOT
POWER
BRIDGE
1
OUT1A
OUT1B
SENSE1B
Rs
POWER
BRIDGE
2
SENSE1A
DISABLE
VS
OUT2A
OUT2B
SENSE2B
Rs
SENSE2A
GND
October 2002
EA_IN1
EA_OUT1
RC1
CC1
D96IN430D
1/20
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