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L6258EP Datasheet

  • L6258EP

  • PWM CONTROLLED - HIGH CURRENT DMOS UNIVERSAL MOTOR DRIVER

  • 281.50KB

  • 22頁(yè)

  • STMICROELECTRONICS   STMICROELECTRONICS

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L6258EP
PWM CONTROLLED - HIGH CURRENT
DMOS UNIVERSAL MOTOR DRIVER
DATASHEET
1
鈻?/div>
FEATURES
ABLE TO DRIVE BOTH WINDINGS OF A
BIPOLAR STEPPER MOTOR OR TWO DC
MOTORS
OUTPUT CURRENT UP TO 1.3A EACH
WINDING
WIDE VOLTAGE RANGE: 12V TO 40V
FOUR QUADRANT CURRENT CONTROL,
IDEAL FOR MICROSTEPPING AND DC
MOTOR CONTROL
PRECISION PWM CONTROL
NO NEED FOR RECIRCULATION DIODES
TTL/CMOS COMPATIBLE INPUTS
CROSS CONDUCTION PROTECTION
THERMAL SHUTDOW
Figure 1. Package
鈻?/div>
鈻?/div>
鈻?/div>
PowerSSO36
Table 1. Order Codes
Part Number
E-L6258EP
Package
PowerSSO36
鈻?/div>
鈻?/div>
鈻?/div>
鈻?/div>
鈻?/div>
2
DESCRIPTION
L6258EP is a dual full bridge for motor control appli-
cations realized in BCD technology, with the capabil-
ity of driving both windings of a bipolar stepper motor
or bidirectionally control two DC motors.
L6258EP and a few external components form a
Figure 2. Block Diagram
R
1
1M
R
C1
C
P
VCP1
VCP2
EA_IN1
complete control and drive circuit. It has high efficien-
cy 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 1.3A per winding in continuous mode, with
peak start-up current up to 2A. A thermal protection
circuitry disables the outputs if the chip temperature
exceeds the safe limits.
C
C1
EA_OUT1
TRI_0
VS
C
BOOT
VBOOT
CHARGE
PUMP
V
R
+
INPUT
&
SENSE
AMP
-
+
-
+
-
ERROR
AMP
TRI_180
C
POWER
BRIDGE
1
OUT1A
VREF1
I3_1
I2_1
I1_1
I0_1
PH_1
V
DD
(5V)
DAC
C
OUT1B
SENSE1B
R
s
SENSE1A
VR GEN
V
R
(V
DD
/2)
THERMAL
PROT.
DISABLE
VS
VREF1
I3_2
I2_2
I1_2
I0_2
PH_2
TRI_CAP
C
FREF
TRIANGLE
GENERATOR
TRI_0
TRI_180
DAC
V
R
INPUT
&
SENSE
AMP
+
-
ERROR
AMP
TRI_0
+
-
+
C
POWER
BRIDGE
2
OUT2A
TRI_180
-
C
OUT2B
SENSE2B
R
s
SENSE2A
GND
EA_IN2
R
C2
R
2
1M
EA_OUT2
D96IN430D
C
C2
July 2005
Rev. 3
1/22

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