參數(shù)資料
型號(hào)： A2987
廠商： Allegro MicroSystems, Inc.
英文描述： 8-CHANNEL SOURCE DRIVER WITH OVER-CURRENT PROTECTION
中文描述： 8通道源驅(qū)動(dòng)器，過電流保護(hù)
文件頁數(shù)： 1/8頁
文件大?。?/td> 84K
代理商： A2987
2987
8-CHANNEL
SOURCE DRIVER
8-CHANNEL SOURCE DRIVER
WITH OVER-CURRENT PROTECTION
Providing over-current protection for each of its eight sourcing
outputs, the UDN2987A and UDN2987LW drivers are used as an
interface between standard low-level logic and relays, motors, sole-
noids, LEDs, and incandescent lamps. The device includes thermal
shutdown and output transient protection/clamp diodes for use with
sustaining voltages to 35 V.
In these drivers, each channel includes a latch to turn OFF that
channel if the maximum channel current is exceeded. All channels are
disabled if the thermal shutdown is activated. A common FAULT
output is used to indicate either chip thermal shutdown or any over-
current condition. All outputs are enabled by pulling the common OE/
R input high. When OE/R is low, all outputs are inhibited and the eight
latches are reset.
Under normal operating conditions, each of eight outputs will
source in excess of 100 mA continuously at an ambient temperature of
25
°
C and a supply of 35 V. The over-current fault circuit will protect
the device from short-circuits to ground with supply voltages of up to
35 V.
The inputs are compatible with 5 V and 12 V logic systems—TTL,
Schottky TTL, DTL, PMOS, and CMOS. In all cases, the output is
switched ON by an active high input level. The UDN2987A is supplied
in a 20-pin dual in-line plastic package; the UDN2987LW is supplied in
a 20-lead small-outline plastic package.
FEATURES
I
350 mA Output Source Current
I
Over-Current Protected
I
Internal Ground Clamp Diodes
I
Output Breakdown Voltage 35 V, Minimum
I
TTL, DTL, PMOS, or CMOS Compatible Inputs
I
Internal Thermal Shutdown
I
Automotive Capable
D
2
Always order by complete part number:
Part Number
Package
UDN2987A
20-Pin DIP
UDN2987LW
20-Lead Wide-Body SOIC
Note that the UDN2987A (DIP) and the UDN2987LW
(SOIC) are electrically identical and share a common
terminal number assignment.
Dwg. PP-067
VS
1
2
3
4
5
6
7
8
14
15
16
17
18
19
20
9
10
11
12
13
GROUND
OUT
IN
FAULT
OE/R
1
OE
N
OE
SENSE
N
FF
x8
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
OUT8
1
IN2
IN3
IN4
IN5
IN6
IN7
IN8
2987
ABSOLUTE MAXIMUM RATINGS
at T
A
= +25
°
C
Driver Supply Voltage, V
S
..................... 35 V
Output Sustaining Voltage, V
CE(sus)
...... 35 V
Continuous Output Current,
I
OUT
........................................ -500 mA*
FAULT Output Voltage, V
CE
................. 35 V
FAULT Output Current, l
C
................. 30 mA
Input Voltage, V
IN
................................. 15 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
* Outputs are disabled at approximately -500 mA
per driver.
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