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參數(shù)資料
| 型號： | 2540 |
| 廠商： | Allegro MicroSystems, Inc. |
| 英文描述： | QUAD DARLINGTON POWER DRIVER |
| 中文描述： | 四達靈頓功率驅動器 |
| 文件頁數(shù)： | 4/8頁 |
| 文件大?。?/td> | 143K |
| 代理商： | 2540 |
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
2540
QUAD DARLINGTON
POWER DRIVER
APPLICATIONS INFORMATION
A typical application is shown for driving four high-current relays,
solenoids, or print heads. A Zener diode is used to increase the
flyback voltage, providing a much faster inductive load turn-off current
decay, resulting in faster dropout (reduced relay contact arcing), and
improved performance. The maximum Zener voltage, plus the load
supply voltage, plus the flyback diode forward voltage must not exceed
the device
’
s rated sustaining voltage.
With external control circuitry, the ENABLE input can be used for
chopper (PWM) applications. If the ENABLE input is not used, it
should be tied high.
All inputs will float high if open circuited.
Dwg. WP-001
TYPICAL APPLICATION
(QUAD RELAY DRIVER WITH ZENER FLYBACK)
Dwg. EP-016
+5V
4
IN
ENABLE
IN
3
IN
IN
1
2
+28 V
K
K
4
3
K
2
15V
K
1
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
O
V
O
C
ZENER CLAMP
DIODE CLAMP
V
CC
V
CE(SAT)
I
OUT
I
CEX
V + V
F
V + V + V
F
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