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STMicroelectronics - PWM CONTROLLED - HIGH CURRENT DMOS UNIVERSAL MOTOR DRIVER

Numéro de référence L6258
Description PWM CONTROLLED - HIGH CURRENT DMOS UNIVERSAL MOTOR DRIVER
Fabricant STMicroelectronics 
Logo STMicroelectronics 





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L6258 fiche technique
® L6258
PWM CONTROLLED - HIGH CURRENT
DMOS UNIVERSAL MOTOR DRIVER
PRELIMINARY DATA
ABLE TO DRIVE BOTH WINDINGS OF A BI-
POLAR STEPPER MOTOR OR TWO DC MO-
TORS
OUTPUT CURRENT UP TO 1.5A EACH
WINDING
WIDE VOLTAGE RANGE: 12V TO 45V
FOUR QUADRANT CURRENT CONTROL,
IDEAL FOR MICROSTEPPING AND DC MO-
TOR CONTROL
PRECISION PWM CONTROL
NO NEED FOR RECIRCULATION DIODES
TTL/CMOS COMPATIBLE INPUTS
CROSS CONDUCTION PROTECTION
THERMAL SHUTDOWN
DESCRIPTION
L6258 is a dual full bridge for motor control appli-
cations realized in BCD technology, with the ca-
pability of driving both windings of a bipolar step-
per motor or bidirectionally control two DC
motors.
L6258 and a few external components form a
PowerSO36
ORDERING NUMBER: L6258
complete control and drive circuit. It has high effi-
ciency 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 motors.
The power stage is a dual DMOS full bridge capa-
ble of sustaining up to 45V, and includes the di-
odes for current recirculation.
The output current capability is 1.5A 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.
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
-
VS
POWER
BRIDGE
1
VBOOT
CBOOT
OUT1A
OUT1B
SENSE1B
Rs
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
GND
EA_IN1
EA_OUT1
RC1
CC1
POWER
BRIDGE
2
SENSE1A
DISABLE
VS
OUT2A
OUT2B
SENSE2B
Rs
SENSE2A
D96IN430D
April 2000
1/18
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.

PagesPages 18
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