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參數資料
| 型號： | 2927 |
| 廠商： | Allegro MicroSystems, Inc. |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | DUAL FULL-BRIDGE PWM MOTOR DRIVER |
| 中文描述： | 雙全橋PWM電機驅動 |
| 文件頁數： | 1/8頁 |
| 文件大小： | 78K |
| 代理商： | 2927 |
2927
DUAL FULL-BRIDGE
PWM MOTOR DRIVER
DSCONTNUEDPRODUCT
T
S
...............................
-55
°
C to +150
°
C
—FORREFERENCEONLY
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.
GND
GND
GND
GND
6
5
4
3
2
1
4
4
4
4
4
7
8
9
10
11
12
13
14
15
16
17
29
30
39
38
37
36
35
34
33
32
31
2
2
2
2
2
2
2
2
2
1
1
Dwg. PP-021
1
2
PWM 1
PWM 2
L
O
1
E
1
S
1
I
1
V
R
P
1
R
1
E
1
I
1
O
1
L
2
I
2
2
V
2
2
2
I
2
2
2
θ
1
2
2
V
V
B
1
θ
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.
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.
DUAL FULL-BRIDGE
PWM MOTOR DRIVER
Always order by complete part number:
A2927SEB
.
FEATURES
I
1.5 A Output Current
I
50 V Output Sustaining Voltage
I
Internal Flyback Diodes
I
Digital Control of Output Current
I
Undervoltage Lockout
I
Internal Thermal Shutdown Circuitry
D
2
2927
PRELIMINARY INFORMATION
(Subject to change without notice)
September 16, 1997
ABSOLUTE MAXIMUM RATINGS
at T
J
≤
+150
°
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
..................
1.0 V
Package Power Dissipation,
........................................
See Graph
Operating Temperature Range,
A
.................................
-20
°
C to +85
°
Storage Temperature Range,
Output current rating may be limited by duty cycle,
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