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PDF L6219DS Data sheet ( Hoja de datos )
| Número de pieza | L6219DS | |
| Descripción | DUAL FULL-BRIDGE PWM MOTOR DRIVER | |
| Fabricantes | Allegro MicroSystems | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de L6219DS (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
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L6219DS
OUT 1A 1
OUT 2A
SENSE 2
2
3
COMP IN 2 4
OUT 2B 5
GROUND 6
2
GROUND 7
I 02 8
I 12
PHASE 2
99
10 θ2
V REF 2 11
RC 2 12
VBB
24
LOAD
SUPPLY
23 SENSE 1
1
22 COMP IN 1
21 OUT 1B
20 I 01
19 GROUND
18 GROUND
17
θ1 16
I 11
PHASE 1
15 V REF 1
14
VCC 13
RC 1
LOGIC
SUPPLY
Dwg. PP-005-3
ABSOLUTE MAXIMUM RATINGS
at TJ ≤ 150°C
Motor Supply Voltage, VBB .................... 45 V
Output Current, IOUT
(Peak) ........................................ +1.0 A
(Continuous) .......................... +750 mA
Logic Supply Voltage, VCC ................... 7.0 V
Logic Input Voltage Range,
VIN ............................... -0.3 V to +7.0 V
Output Emitter Voltage, VSENSE ............ 1.5 V
Package Power Dissipation,
PD ........................................................ See Graph
Operating Temperature Range,
TA ................................. -20°C to +85°C
Storage Temperature Range,
TS ............................... -55°C to +150°C
Output current rating may be limited by duty
cycle, ambient temperature, and heat sinking.
Under any set of conditions, do not exceed the
specified peak current rating or a junction
temperature of +150°C.
DUAL FULL-BRIDGE
PWM MOTOR DRIVER
The L6219DS motor driver is designed to drive both windings of a
bipolar stepper motor or bidirectionally control two dc motors. Both
bridges are capable of sustaining 45 V and include internal pulse-width
modulation (PWM) control of the output current to 750 mA. The
outputs have been optimized for a low output saturation voltage drop
(less than 1.8 V total source plus sink at 500 mA).
For PWM current control, the maximum output current is deter-
mined by the user’s selection of a reference voltage and sensing
resistor. Two logic-level inputs select output current limits of 0, 33,
67, or 100% of the maximum level. A PHASE input to each bridge
determines load current direction.
The bridges include both ground clamp and flyback diodes for
protection against inductive transients. Internally generated delays
prevent cross-over currents when switching current direction. Special
power-up sequencing is not required. Thermal protection circuitry
disables the outputs if the chip temperature exceeds safe operating
limits.
The L6219DS is supplied in a 24-lead surface-mountable SOIC. Its
batwing construction provides for maximum package power dissipation
in the smallest possible construction. This device is also available on
special order for operation from -40°C to +85°C or to +105°C.
FEATURES
I Interchangeable with SGS L6219DS
I 750 mA Continuous Output Current
I 45 V Output Sustaining Voltage
I Internal Clamp Diodes
I Internal PWM Current Control
I Low Output Saturation Voltage
I Internal Thermal Shutdown Circuitry
I Similar to Dual PBL3717, UC3770
Always order by complete part number, e.g., L6219DS .
1 page  
L6219DS
DUAL FULL-BRIDGE
MOTOR DRIVER
LOGIC CONTROL OF OUTPUT CURRENT
Two logic level inputs (l and I ) allow digital selection of the motor
01
winding current at 100%, 67%, 33%, or 0% of the maximum level per
the table. The 0% output current condition turns off all drivers in the
bridge and can be used as an OUTPUT ENABLE function.
CURRENT-CONTROL TRUTH TABLE
l0 I1 Output Current
L L VREF/10 RS = ITRIP
H L VREF/15 RS = 2/3 ITRIP
L H VREF/30 RS = 1/3 ITRIP
HH
0
These logic level inputs greatly enhance the implementation of
µP-controlled drive formats.
During
half-step
operations,
the
l
0
and
l
1
allow
the
µP
to
control
the
motor at a constant torque between all positions in an eight-step
TYPICAL APPLICATION
1
RS
RC
CC
2
3
4
5
2
6
FROM
µP
VREF
RT
7
8
99
10 θ2
11
12
CT
STEPPER
MOTOR
VBB
1
24
23
RC
22
21
RS
CC
VBB
+
20
19
18
17
θ1 16
15
14
VCC 13
FROM
µP
VREF
+5 V CT RT
Dwg. EP-008-2
sequence. This is accomplished by digitally
selecting 100% drive current when only one
phase is on and 67% drive current when two
phases are on. Logic highs on both l0 and l1
turn off all drivers to allow rapid current decay
when switching phases. This helps to ensure
proper motor operation at high step rates.
The logic control inputs can also be
used to select a reduced current level (and
reduced power dissipation) for ‘hold’ condi-
tions and/or increased current (and available
torque) for start-up conditions.
GENERAL
The PHASE input to each bridge
determines the direction motor winding
current flows. An internally generated
deadtime (approximately 2 µs) prevents
crossover currents that can occur when
switching the PHASE input.
All four drivers in the bridge output can
be
turned
off
between
steps
(l
0
=
l
1
≥
2.4
V)
resulting in a fast current decay through the
internal output clamp and flyback diodes. The
fast current decay is desirable in half-step and
high-speed applications. The PHASE, l0,and I1
inputs float high.
Varying the reference voltage (VREF)
provides continuous control of the peak load
current for microstepping applications.
Thermal protection circuitry turns off all
drivers when the junction temperature
reaches +170°C. It is only intended to protect
the device from failures due to excessive
junction temperature and should not imply
that output short circuits are permitted. The
output drivers are re-enabled when the
junction temperature cools to +145°C.
The L6219DS output drivers are opti-
mized for low output saturation voltages—less
than 1.8 V total (source plus sink) at 500 mA.
Under normal operating conditions, when
combined with the excellent thermal proper-
ties of the batwing package design, this
allows continuous operation of both bridges
simultaneously at 500 mA.
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet L6219DS.PDF ] | |
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