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PDF L6258E Data sheet ( Hoja de datos )
| Número de pieza | L6258E | |
| Descripción | PWM CONTROLLED - HIGH CURRENT DMOS UNIVERSAL MOTOR DRIVER | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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L6258E
PWM controlled
high current DMOS universal motor driver
Not For New Design
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
Description
L6258E 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.
L6258E 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 1.2A 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.
Table 1. Device summary
Order code
L6258E
(Replaced by L6258EX)
Package
PowerSO36
Packing
Tube
December 2007
Rev 8
This is information on a product still in production but not recommended for new designs.
1/31
www.st.com
1
1 page  
L6258E
1 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
VDD
Vref1/Vref2
IO
IO
Vin
Vboot
Vboot - Vs
Tj
Tstg
Supply voltage
Logic supply voltage
Reference voltage
Output current (peak)
Output current (continuous)
Logic input voltage range
Bootstrap supply
Maximum Vgate applicable
Junction temperature
Storage temperature range
Value
45
7
2.5
1.5
1.2
-0.3 to 7
60
15
150
-55 to 150
Unit
V
V
V
A
A
V
V
V
°C
°C
5/31
5 Page 
L6258E
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. 1A
Fig. 1B
Fig. 1C
D97IN624
11/31
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| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet L6258E.PDF ] | |
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