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A6219DS Datasheet

  • A6219DS

  • Dual Full-Bridge PWM Motor Driver

  • 8頁

  • ALLEGRO   ALLEGRO

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A6219DS
Dual Full-Bridge PWM Motor Driver
Features and Benefits
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Interchangeable with SGS L6219DS
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750 mA Continuous Output Current
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45 V Output Sustaining Voltage
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Internal Clamp Diodes
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Internal PWM Current Control
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Low Output Saturation Voltage
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Internal Thermal Shutdown Circuitry
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Similar to Dual PBL3717, UC3770
Description
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
determined by user 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 crossover 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-pin surface-mountable SOIC,
with 4 internally-fused leads for maximum package power
dissipation in the smallest possible construction. It is lead (Pb)
free with 100% matte tin leadframe plating.
Package: 24 pin SOICW (suffix LB)
Not to scale
Typical Application
STEPPER
MOTOR
1
2
R
S
R
C
C
C
V
BB
V
24
23
R
S
R
C
22
21
20
19
18
17
FROM
渭P
C
C
+
BB
3
4
5
6
7
8
2
1
FROM
渭P
99
PWM 1
1
16
15
14
820 pF
V
10
V
REF
2
PWM 2
REF
11
12
820 pF
C
T
V
CC
13
+5 V
C
56 k
R
T
T
56 k
R
T
Dwg. EP-008B1
29319.43H

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