L6258EP Datasheet, PDF (1/22 Pages) STMicroelectronics – PWM CONTROLLED - HIGH CURRENT DMOS UNIVERSAL MOTOR DRIVER

L6258EP
PWM CONTROLLED - HIGH CURRENT
DMOS UNIVERSAL MOTOR DRIVER
DATASHEET
1 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
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 1. Package
PowerSSO36
Table 1. Order Codes
Part Number
E-L6258EP
Package
PowerSSO36
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.
Figure 2. Block Diagram
VCP1
VREF1
I3_1
I2_1
I1_1
I0_1
PH_1
V_DD(5V)
VREF1
I3_2
I2_2
I1_2
I0_2
PH_2
TRI_CAP
C_FREF
C_P
CHARGE
PUMP
DAC
VCP2
INPUT
&
SENSE
AMP
EA_IN1
R₁ 1M
R_C1
C_C1
EA_OUT1
TRI_0
+
C
V_R
ERROR
+ ^AMP
-
+
-
TRI_180 C
-
VR GEN
V_R (V_DD/2)
THERMAL
PROT.
DAC
INPUT
&
SENSE
AMP
TRIANGLE
GENERATOR
TRI_0
TRI_180
V_R
ERROR
+ ^AMP
-
TRI_0
+
C
-
+
C
-
TRI_180
GND
EA_IN2
EA_OUT2
R_C2
R₂ 1M
C_C2
C_BOOT
VS
VBOOT
POWER
BRIDGE
1
OUT1A
OUT1B
SENSE1B
R_s
POWER
BRIDGE
2
SENSE1A
DISABLE
VS
OUT2A
OUT2B
SENSE2B
R_s
SENSE2A
D96IN430D
July 2005
Rev. 3
1/22