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PDF ( 数据手册 , 数据表 ) 2919

零件编号 2919
描述 DUAL FULL-BRIDGE PWM MOTOR DRIVER
制造商 Allegro MicroSystems
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2919 数据手册, 描述, 功能
2919
DUAL FULL-BRIDGE
MOTOR DRIVER
2919
A2919SB
OUT 1A 1
OUT 2A 2
E2 3
SENSE 2 4
OUT 2B 5
GROUND 6
2
GROUND 7
I 02
I 12
PHASE 2
8
99
10 θ2
V REF 2 11
RC 2 12
VBB
24
LOAD
SUPPLY
23 E 1
1
22 SENSE 1
21 OUT 1B
20 I 01
19 GROUND
18 GROUND
17 I 11
θ1 16 PHASE 1
15 V REF 1
14
VCC 13
RC 1
LOGIC
SUPPLY
Dwg. PP-005
ABSOLUTE MAXIMUM RATINGS
at TJ 150°C
Motor Supply Voltage, VBB ................... 45 V
Output Current, IOUT
(Peak, tw 20 µs) ........................ ±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, VE .................. 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 A2919SB and A2919SLB motor drivers are 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%, 41%,
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 A2919SB is supplied in a 24-pin dual in-line plastic batwing
package with a copper lead-frame and heat sinkable tabs for improved
power dissipation capabilities. The A2919SLB is supplied in a 24-lead
surface-mountable SOIC. Their batwing construction provides for
maximum package power dissipation in the smallest possible construc-
tion. The A2919SB/SLB are available for operation from -40°C to
+85°C. To order, change the suffix from 'S–' to 'E–'. These devices
are also available on special order for operation to +125°C. For
applications not requiring quarter-step operation, but desire lower
detent or running current, the similar UDN2916B/EB/LB may be pre-
ferred.
FEATURES
s 750 mA Continuous Output Current
s 45 V Output Sustaining Voltage
s Internal Clamp Diodes
s Internal PWM Current Control
s Low Output Saturation Voltage
s Internal Thermal Shutdown Circuitry
s Half- or Quarter-Step Operation of Bipolar Stepper Motors
Always order by complete part number:
Part Number Package
A2919SB
24-Pin DIP
RθJA
40°C/W
A2919SLB
24-Lead SOIC 55°C/W
RθJT
6.0°C/W
6.0°C/W







2919 pdf, 数据表
2919
DUAL FULL-BRIDGE
MOTOR DRIVER
A2919SLB
Dimensions in Inches
(for reference only)
24 13
0.0125
0.0091
0.2992
0.2914
0.020 1
0.013
2
3 0.6141
0.5985
0.491
0.394
0.050
0.016
0.050
BSC
NOTE 1
NOTE 3
0° TO 8°
0.0926
0.1043
0.0040 MIN.
Dimensions in Millimeters
(controlling dimensions)
24 13
Dwg. MA-008-25 in
0.32
0.23
7.60
7.40
0.51
0.33
1
2
3 15.60
15.20
2.65
2.35
0.10 MIN.
10.65
10.00
1.27
0.40
1.27
BSC
NOTE 1
NOTE 3
0° TO 8°
Dwg. MA-008-25A mm
Allegro MicroSystems, Inc. reserves the right to make, from time to time, such
departures from the detail specifications as may be required to permit improvements
in the design of its products.
The information included herein is believed to be accurate and reliable.
However, Allegro MicroSystems, Inc. assumes no responsibility for its use; nor for
any infringements of patents or other rights of third parties which may result from its
use.
NOTES: 1. Webbed lead frame. Leads 6, 7, 18, and 19 are internally
one piece.
2. Lead spacing tolerance is non-cumulative.
3. Exact body and lead configuration at vendor’s option
within limits shown.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000














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