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參數(shù)資料
| 型號(hào)： | 3966 |
| 廠商： | Allegro MicroSystems, Inc. |
| 英文描述： | DIODE SWITCHING DUAL-DUAL SERIES 70V 250mA-Io 200mW 4ns-trr SOT-363 3K/REEL |
| 中文描述： | 雙全橋PWM電機(jī)驅(qū)動(dòng) |
| 文件頁(yè)數(shù)： | 1/12頁(yè) |
| 文件大?。?/td> | 201K |
| 代理商： | 3966 |
D
2
3966
DUAL FULL-BRIDGE PWM
MOTOR DRIVER
The A3966SA and A3966SLB are designed to drive both windings of a
two-phase bipolar stepper motor. Each device includes two H-bridges
capable of continuous output currents of
±
650 mA and operating voltages to
30 V. Motor winding current can be controlled by the internal fixed-fre-
quency, pulse-width modulated (PWM), current-control circuitry. The peak
load current limit is set by the user’s selection of a reference voltage and
current-sensing resistors. Except for package style and pinout, the two
devices are identical.
The fixed-frequency pulse duration is set by a user-selected external
RC timing network. The capacitor in the RC timing network also determines
a user-selectable blanking window that prevents false triggering of the PWM
current-control circuitry during switching transitions.
To reduce on-chip power dissipation, the H-bridge power outputs have
been optimized for low saturation voltages. The sink drivers feature Allegro’s
patented Satlington output structure. The Satlington outputs combine the
low voltage drop of a saturated transistor and the high peak current capability
of a Darlington.
For each bridge, a PHASE input controls load-current polarity by
selecting the appropriate source and sink driver pair. For each bridge, an
ENABLE input, when held high, disables the output drivers. Special power-
up sequencing is not required. Internal circuit protection includes thermal
shutdown with hysteresis, ground-clamp and flyback diodes, and crossover-
current protection.
The A3966SA is supplied in a 16-pin dual in-line plastic package. The
A3966SLB is supplied in a 16-lead plastic SOIC with copper heat sink tabs.
The power tab is at ground potential and needs no electrical isolation.
A3966SLB
OUT
1B
GROUND
Dwg. PP-066-1
GROUND
OUT
1A
PHASE
1
OUT
2A
SENSE
1
ENABLE
1
LOAD
SUPPLY
REFERENCE
PHASE
2
ENABLE
2
SENSE
2
OUT
2B
LOGIC
SUPPLY
RC
LOGIC
LOGIC
1
2
3
14
15
16
6
7
10
11
8
9
RC
4
5
V
REF
13
12
V
BB
V
CC
V
BB
FEATURES
I
±
650 mA Continuous Output Current
I
30 V Output Voltage Rating
I
Internal Fixed-Frequency PWM Current Control
I
Satlington Sink Drivers
I
User-Selectable Blanking Window
I
Internal Ground-Clamp & Flyback Diodes
I
Internal Thermal-Shutdown Circuitry
I
Crossover-Current Protection and UVLO Protection
Always order by complete part number:
Part Number
Package
R
θ
JA
60
°
C/W
67
°
C/W
R
θ
JC
38
°
C/W
—
R
θ
JT
—
6
°
C/W
A3966SA
16-pin DIP
A3966SLB
16-lead batwing SOIC
ABSOLUTE MAXIMUM RATINGS
Load Supply Voltage, V
BB
......................
30 V
Output Current, I
OUT
(peak) ...........
±
750 mA
(continuous) ..............................
±
650 mA
Logic Supply Voltage, V
CC
....................
7.0 V
Input Voltage, V
in
........
-0.3 V to V
CC
+ 0.3 V
Sense Voltage, V
S
................................
1.0 V
Package Power Dissipation (T
A
= 25
°
C), P
D
A3966SA .....................................
2.08 W*
A3966SLB ...................................
1.87 W*
Operating Temperature Range,
T
A
.....................................
-20
°
C to +85
°
C
Junction Temperature,
T
J
..................................................
+150
°
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 current rating
or a junction temperature of 150
°
C.
* Per SEMI G42-88 Specification,
Thermal Test Board
Standardization for Measuring Junction-to-Ambient
Thermal Resistance of Semiconductor Packages
.
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PDF描述 |
|---|---|
| 3967 | MICROSTEPPING DRIVER WITH TRANSLATOR |
| 3968 | DIODE SWITCHING SINGLE 70V 250mA-Io 150mW 4ns-trr SOT-523 3K/REEL |
| 3971 | DIODE SWITCHING TRIPLE ISOLATED 70V 250mA-Io 350mW 4ns-trr SOT-26 3K/REEL |
| 3972 | DIODE SWITCHING DUAL SERIES 70V 250mA-Io 150mW 4ns-trr SOT-523 3K/REEL |
| 3973 | DIODE ARRAY, SMT, SW, MMBD4448, SOT-363 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 3966_03 | 制造商:ALLEGRO 制造商全稱:Allegro MicroSystems 功能描述:DUAL FULL-BRIDGE PWM MOTOR DRIVER |
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