參數(shù)資料
型號(hào)： 3971
廠商： Allegro MicroSystems, Inc.
英文描述： DIODE SWITCHING TRIPLE ISOLATED 70V 250mA-Io 350mW 4ns-trr SOT-26 3K/REEL
中文描述： 雙DMOS全橋驅(qū)動(dòng)器
文件頁數(shù)： 1/8頁
文件大?。?/td> 141K
代理商： 3971
D
2
3971
DUAL DMOS
FULL-BRIDGE DRIVER
Designed to interface between external PWM control logic and
inductive loads such as relays, solenoids, dc motors, or stepper motors,
each full bridge can operate with output currents to
±
2.5 A and operating
voltages to 50 V.
Low r
DS(on)
DMOS output drivers provide low power dissipation
during PWM operation. Internal charge pump circuitry is used to create
a boosted voltage to fully enhance the high-side DMOS switches.
Three TTL-compatible logic-input terminals per bridge allow flex-
ibility in configuring PWM control.
Internal circuit protection includes thermal shutdown with hysteresis,
and crossover-current protection. Special power -up sequencing is not
required.
The A3971SLB is supplied in a 24-lead plastic SOIC with a copper
batwing tab. The power tab is at ground potential and needs no electri-
cal isolation.
FEATURES
I
±
2.5 A Load Current Capability per Bridge
I
Parallel Outputs for 5 A Load-Current Capability
I
Low r
DS(on)
Outputs
Typically 325 m
source, 175 m
sink
I
Synchronous Rectification via Control Logic
I
Internal Undervoltage Monitor
I
Crossover-Current Protection
I
Source Connections for External Current Sensing
I
Thermal Shutdown Circuitry
ADVANCE INFORMATION
(Subject to change without notice)
May 2, 2000
ABSOLUTE MAXIMUM RATINGS
at TA = +25
°
C
Load Supply Voltage, V
BB
................
50 V
Output Current, I
Transient (<500 ns) ...................
±
5 A
Logic Supply Voltage,
V
............................................
7.0 V
Sense Voltage, V
......................
0.5 V
Logic Input Voltage Range,
V
..................
-0.3 V to V
+ 0.3 V
High-Side Gate Voltage ...........
V
BB
+ 8 V
Package Power Dissipation,
P
.............................................
2.2 W
Operating Temperature Range,
T
.............................
-20
°
C to +85
°
C
Junction Temperature, T
.............
+150
°
C
Storage Temperature Range,
T
S
...........................
-55
°
C to +150
°
C
Output duty cycle, ambient temperature, and
heat sinking may limit current rating. Under
any set of conditions, do not exceed the
specified current rating or a junction tempera-
ture of 150
°
C.
Always order by complete part number:
A3971SLB
.
L
L
CHARGE PUMP
24
23
22
21
20
19
18
17
16
15
14
13
GROUND
GROUND
PWM
2
S
20
OUT
2A
LOAD
SUPPLY
2
SENSE
2
OUT
2B
S
21
V
CP
CP2
V
DD
Dwg. PP-069-2
1
2
3
4
5
6
7
8
9
12
11
10
9
GROUND
GROUND
NO
CONNECTION
LOGIC
GROUND
S
10
OUT
1A
OUT
1B
S
11
PWM
1
CP1
SENSE
1
LOAD
SUPPLY
1
NC
LOGIC
SUPPLY
V
BB2
V
BB1
相關(guān)PDF資料
PDF描述
3972 DIODE SWITCHING DUAL SERIES 70V 250mA-Io 150mW 4ns-trr SOT-523 3K/REEL
3973 DIODE ARRAY, SMT, SW, MMBD4448, SOT-363
3974 DMOS DUAL FULL-BRIDGE PWM MOTOR DRIVER
3976 DIODE SWITCHING TRIPLE ISOLATED 70V 250mA-Io 200mW 4ns-trr SOT-363 3K/REEL
3977 MICROSTEPPING DMOS DRIVER WITH TRANSLATOR
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