A2927SEB
| Model | A2927SEB |
| Description | DUAL FULL-BRIDGE PWM MOTOR DRIVER |
| PDF file | Total 8 pages (File size: 80K) |
| Chip Manufacturer | ALLEGRO |
2927
DUAL FULL-BRIDGE
PWM MOTOR DRIVER
PRELIMINARY INFORMATION
(Subject to change without notice)
September 16, 1997
2927
DUAL FULL-BRIDGE
PWM MOTOR DRIVER
The A2927SEB 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 50 V and include internal pulse-width
modulation (PWM) control of the output current to 1.5 A.
39
GND
Data Sheet
29319.23
SENSE
1
PHASE
1
V
REF 1
ENABLE
1
43
42
41
RC
1
E
44
GND
EN
1
V
CC
θ
1
40
6
5
4
3
2
1
LOGIC SUPPLY
OUT
1A
OUT
1B
I
10
I
11
1
7
8
9
10
11
12
13
14
15
16
17
1
PWM 1
38
37
36
35
34
33
32
31
GND
ABSOLUTE MAXIMUM RATINGS
at T
J
≤
+150
°
C
Motor Supply Voltage, V
BB
...................
50 V
Output Current, I
OUT
.........................
±
1.5 A
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
..................
1.0 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.
Y
L
O
N
R
O
P
E
D
C
E
N
U
E
N
R
I
E
T
F
N
E
O
R
C
R
S
O
I
F
D
—
2
V
BB
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, 33%, 67%, or 100%
of the maximum level. A PHASE input to each bridge determines load
current direction. Active-low ENABLE inputs control the four drivers in
each bridge.
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 A2927SEB is supplied in a 44-lead power PLCC for surface-
mount applications. Its batwing construction provides for maximum
package power dissipation in the smallest possible construction.
30
PWM 2
U
D
T
C
29
GND
θ
2
26
27
EN
2
19
LOAD SUPPLY
22
OUT
2B
21
OUT
2A
18
SENSE
2
20
V
REF 2
25
I
20
23
I
21
24
PHASE
2
2
ENABLE
RC
2
E
2
28
Dwg. PP-021
FEATURES
s
1.5 A Output Current
s
50 V Output Sustaining Voltage
s
Internal Flyback Diodes
s
Undervoltage Lockout
s
Digital Control of Output Current
s
Internal Thermal Shutdown Circuitry
Always order by complete part number:
A2927SEB
.
