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參數(shù)資料
| 型號： | 2917 |
| 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(shù)： | 1/8頁 |
| 文件大?。?/td> | 178K |
| 代理商： | 2917 |
The UDN2917EB 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 modula-
tion (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.
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 tempera-
ture exceeds safe operating limits.
The UDN2917EB 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. The UDN2917EB is available
for operation from -40
°
C to +85
°
C. To order, change the prefix from 'UDN' to
'UDQ'. This device is also available on special order for operation to +125
°
C.
2 917
DUAL FULL-BRIDGE
PWM MOTOR DRIVER
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
E
2
O
2
I
2
S
2
V
R
P
2
R
2
E
2
I
2
O
2
θ
1
2
E
2
V
C
V
B
1
E
θ
ABSOLUTE MAXIMUM RATINGS
at T
J
≤
+150
°
C
Motor Supply Voltage, V
BB
....................
45 V
Output Current, I
OUT
(t
w
≤
20
μ
s) .....
±
1.75 A
(Continuous) ...............................
±
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.
Always order by complete part number:
UDN2917EB
.
Dwg. PP-021
D
2
FEATURES
I
1.5 A Continuous Output Current
I
45 V Output Sustaining Voltage
I
Internal Clamp Diodes
I
Digital Control of Output Current
I
Internal Thermal Shutdown Circuitry
I
Similar to Dual PBL3770
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