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PDF L6258EX Data sheet ( Hoja de datos )

Número de pieza L6258EX
Descripción PWM controlled high current DMOS universal motor driver
Fabricantes STMicroelectronics 
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L6258EX
PWM controlled
high current DMOS universal motor driver
Features
Able to drive both windings of a bipolar stepper
motor or two DC motors
Output current up to 1.5A 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
Description
L6258EX is a dual full bridge for motor control
applications realized in BCD technology, with the
capability of driving both windings of a bipolar
stepper motor or bidirectionally control two DC
motors.
L6258EX and a few external components form a
complete 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 motors.
PowerSO36
The power stage is a dual DMOS full bridge
capable of sustaining up to 40V, and includes the
diodes 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.
Table 1. Device summary
Order code
E-L6258EX
E-L6258EXTR
Package
PowerSO36
PowerSO36
Packing
Tube
Tape&Reel
December 2007
Rev 6
1/32
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1

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L6258EX pdf
L6258EX
1 Block diagram
Block diagram
Figure 1.
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VCP1
VREF1
I3_1
I2_1
I1_1
I0_1
PH_1
Block diagram
CP
CHARGE
PUMP
VCP2
DAC
INPUT
&
SENSE
AMP
EA_IN1
R1 1M
RC1
CC1
EA_OUT1
TRI_0
+
C
VR
ERROR
+ AMP
-
+
- TRI_180 C
-
VDD(5V)
VR GEN
VR (VDD/2)
THERMAL
PROT.
VREF1
I3_2
I2_2
I1_2
I0_2
PH_2
TRI_CAP
CFREF
DAC
INPUT
&
SENSE
AMP
TRIANGLE
GENERATOR
TRI_0
TRI_180
VR
ERROR
+ AMP
-
TRI_0
+
C
-
+
C
-
TRI_180
GND
EA_IN2
EA_OUT2
RC2
R2 1M
CC2
CBOOT
VS VBOOT
POWER
BRIDGE
1
OUT1A
OUT1B
SENSE1B
Rs
POWER
BRIDGE
2
SENSE1A
DISABLE
VS
OUT2A
OUT2B
SENSE2B
Rs
SENSE2A
D96IN430D
Table 2. Absolute maximum rating
Parameter
Description
Vs Supply voltage
VDD Logic supply voltage
Vref1/Vref2
IO
Reference voltage
Output current (peak)(1)
IO Output current (continuous)
Vin Logic input voltage range
Vboot
Bootstrap supply
Vboot - Vs
Maximum Vgate applicable
Tj Junction temperature
Tstg Storage temperature range
1. This current is intended as not repetitive current for max. 1 second.
Value
45
7
2.5
2
1.5
-0.3 to 7
60
15
150
-55 to 150
Unit
V
V
V
A
A
V
V
V
°C
°C
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L6258EX arduino
L6258EX
Functional description
2.1 Reference voltage
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The voltage applied to VREF pin is the reference for the internal DAC and, together with the
sense resistor value, defines the maximum current into the motor winding according to the
following relation:
IMAX
=
-0---,--5----------V----R----E----F-
RS
=
--1---
FI
V-----R----E---F-
RS
where Rs = sense resistor value
Figure 4. Power bridge configuration
IN_A
VS
T1 T2
OUT_A LOAD OUT_B
IN_B
T3 T4
OUTA
OUTB
Iload
0
OUTA
OUTB
Iload
0
OUTA
OUTB
0
Iload
Fig. 4A
Fig. 4B
Fig. 4C
D97IN624
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