Allegro A2919SLB, A2919SB, A2919ELB, A2919EB Datasheet
2919
DUAL FULL-BRIDGE
MOTOR DRIVER
DUAL FULL-BRIDGE
PWM MOTOR DRIVER
A2919SB
1
2
3
4
5
6
7
8
9
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
θ
2
θ
1
V
CC
PWM 2
PWM 1
2
V
BB
1
GROUND
GROUND
GROUND
GROUND
02
I
12
I
PHASE
2
V
REF 2
2
RC
1
RC
V
REF 1
PHASE
1
11
I
2B
OUT
SENSE
2
2
E
2A
OUT
1A
OUT
1
E
SENSE
1
1B
OUT
01
I
LOAD
SUPPLY
LOGIC
SUPPLY
Dwg. PP-005
Data Sheet
29319.21
ABSOLUTE MAXIMUM RATINGS
at T
J ≤
150°C
Motor Supply Voltage, VBB................... 45 V
Output Current, I
OUT
(Peak, tw ≤ 20 µs)........................ ±1.0 A
(Continuous) ..........................
±750 mA
Logic Supply Voltage, V
CC
................... 7.0 V
Logic Input Voltage Range,
V
IN
............................... -0.3 V to +7.0 V
Output Emitter Voltage, V
E
.................. 1.5 V
Package Power Dissipation,
P
D
....................................... See Graph
Operating Temperature Range,
T
A
................................. -20°C to +85°C
Storage Temperature Range,
T
S
............................... -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.
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 determined 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 construction. 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 preferred.
FEATURES
■ 750 mA Continuous Output Current
■ 45 V Output Sustaining Voltage
■ Internal Clamp Diodes
■ Internal PWM Current Control
■ Low Output Saturation Voltage
■ Internal Thermal Shutdown Circuitry
■ Half- or Quarter-Step Operation of Bipolar Stepper Motors
Always order by complete part number:
Part Number Package R
θJA
R
θJT
A2919SB 24-Pin DIP 40°C/W 6.0°C/W
A2919SLB 24-Lead SOIC 55°C/W 6.0°C/W
2919
2919
DUAL FULL-BRIDGE
MOTOR DRIVER
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
A2919SLB
PWM CURRENT-CONTROL CIRCUITRY
V
BB
1
2
3
4
5
6
7
8
9
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
GROUND
GROUND
GROUND
GROUND
02
I
12
I
PHASE
2
V
REF 2
2
RC
V
CC
1
RC
V
REF 1
PHASE
1
11
I
2B
OUT
SENSE
2
2
E
2A
OUT
1A
OUT
1
E
SENSE
1
1B
OUT
01
I
LOAD SUPPLY
LOGIC SUPPLY
PWM 2
PWM 1
θ
1
θ
2
Dwg. PP-047
2
1
50 75 100 125 150
5
1
0
ALLOWABLE PACKAGE POWER DISSIPATION IN WATTS
TEMPERATURE IN °C
4
3
2
25
Dwg. GP-049A
R = 6.0°C/W
θJT
SUFFIX 'B', R = 40°C/W
θJA
SUFFIX 'LB', R = 55°C/W
θJA
TRUTH TABLE
PHASE OUT
A
OUT
B
HHL
LLH
V
REF
Dwg. EP-007-3
V
BB
SENSE
ONE
SHOT
SOURCE
DISABLE
RC
–
+
I
0
I
1
÷10
E
OUT
A
OUT
B
'B' PACKAGE,
CHANNEL 1
PIN NUMBERS
SHOWN.
R
C
R
S
R
T
C
C
C
T
24
60 kΩ
120 kΩ
42 kΩ
211232214
20
17
15
W
Copyright © 1994 Allegro MicroSystems, Inc.
2919
DUAL FULL-BRIDGE
MOTOR DRIVER
ELECTRICAL CHARACTERISTICS at T
A
= +25°C, TJ ≤ 150°C, V
BB
= 45 V, VCC = 4.75 V to 5.25 V,
V
REF
= 5.0 V (unless otherwise noted).
(at trip point)
Limits
Characteristic Symbol Test Conditions Min. Typ. Max. Units
Output Drivers (OUTA or OUTB)
Motor Supply Range V
BB
Operating 10 — 45 V
Output Leakage Current I
CEX
V
OUT
= V
BB
— < 1.0 50 µA
V
OUT
= 0 — <-1.0 -50 µA
Output Sustaining Voltage V
CE(sus)
I
OUT
= ±750 mA, L = 3.0 mH 45 + V
F
——V
Output Saturation Voltage V
CE(SAT)
Sink Driver, I
OUT
= +500 mA — 0.4 0.6 V
Sink Driver, I
OUT
= +750 mA — 1.0 1.2 V
Source Driver, I
OUT
= -500 mA — 1.0 1.2 V
Source Driver, I
OUT
= -750 mA — 1.3 1.5 V
Clamp Diode Leakage Current I
R
VR = 45 V — < 1.0 50 µA
Clamp Diode Forward Voltage V
F
IF = 750 mA — 1.6 2.0 V
Driver Supply Current I
BB(ON)
Both Bridges ON, No Load — 20 25 mA
I
BB(OFF)
Both Bridges OFF — 5.0 10 mA
Control Logic
Input Voltage V
IN(1)
All inputs 2.4 — — V
V
IN(0)
All inputs — — 0.8 V
Input Current I
IN(1)
VIN = 2.4 V — <1.0 20 µA
V
IN
= 0.8 V — - 3.0 -200 µA
Reference Voltage Range V
REF
1.0 — 7.5 V
Current Limit Threshold V
REF/VSENSEI0
= I1 = 0.8 V, V
REF
= 1.0 V to 7.5 V 9.5 10 10.5 —
I
0
= 2.4 V, I1 = 0.8 V, 13.5 15 16.5 —
V
REF
= 1.5 V to 7.5 V
I
0
= 0.8 V, I1 = 2.4 V, 20.7 24.4 28.0 —
V
REF
= 1.5 V to 7.5 V
Thermal Shutdown Temperature T
J
— 170 — °C
Total Logic Supply Current I
CC(ON)
I0 = I1 = 0.8 V, No Load — 40 50 mA
I
CC(OFF)
I0 = I1 = 2.4 V, No Load — 10 12 mA
Total Reference Current I
REF1
+ I
REF2
V
REF1
= V
REF2
= 7.5 V, I0 = I1 = 2.4 V 140 185 250 µA
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