L6258E Datasheet, PDF (1/24 Pages) STMicroelectronics – PWM CONTROLLED - HIGH CURRENT DMOS UNIVERSAL MOTOR DRIVER

L6258E
PWM CONTROLLED - HIGH CURRENT
DMOS UNIVERSAL MOTOR DRIVER
1 FEATURES
■ ABLE TO DRIVE BOTH WINDINGS OF A
BIPOLAR STEPPER MOTOR OR TWO DC
MOTORS
■ OUTPUT CURRENT UP TO 1.2A 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
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.
L6258E and a few external components form a com-
Figure 1. Package
NOT FOR NEW DESIGN
PowerSO36
Table 1. Order Codes
Part Number
L6258E
(Replaced by L6258EX)
Package
PowerSO36
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.
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
VR GEN
DAC
TRIANGLE
GENERATOR
VCP2
INPUT
&
SENSE
AMP
EA_IN1
R₁ 1M
R_C1
C_C1
EA_OUT1
TRI_0
+
C
V_R
ERROR
+ ^AMP
-
+
-
TRI_180 C
-
V_R (V_DD/2)
THERMAL
PROT.
INPUT
&
SENSE
AMP
TRI_0
TRI_180
V_R
ERROR
+ ^AMP
-
TRI_0
+
C
-
+
C
-
TRI_180
C_BOOT
VS
VBOOT
POWER
BRIDGE
1
OUT1A
OUT1B
SENSE1B
R_s
POWER
BRIDGE
2
SENSE1A
DISABLE
VS
OUT2A
OUT2B
SENSE2B
R_s
SENSE2A
GND
EA_IN2
EA_OUT2
R_C2
R₂ 1M
C_C2
D96IN430D
September 2004
Rev. 7
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