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參數(shù)資料
| 型號： | A3968SLB |
| 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 WITH BRAKE |
| 中文描述： | 雙全橋PWM電機驅動器，帶有剎車 |
| 文件頁數(shù)： | 1/12頁 |
| 文件大?。?/td> | 140K |
| 代理商： | A3968SLB |
3968
DUAL FULL-BRIDGE PWM
MOTOR DRIVER WITH BRAKE
The A3968SA and A3968SLB are designed to bidirectionally control two
dc motors. 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-frequency, 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, the INPUT
A
and INPUT
B
terminals determine the load
current polarity by enabling the appropriate source and sink driver pair.
When a logic low is applied to both INPUTs of a bridge, the braking function
is enabled. In brake mode, both source drivers are turned OFF and both sink
drivers are turned ON, thereby dynamically braking the motor. When a logic
high is applied to both INPUTs of a bridge, all output drivers are disabled.
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 A3968SA is supplied in a 16-pin dual in-line plastic package. The
A3968SLB 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.
A3968SLB
LOGIC
LOGIC
OUT
1B
1
2
3
14
15
16
GROUND
Dwg. PP-066
6
7
10
11
8
9
GROUND
OUT
1A
INPUT
1A
OUT
2A
RC
SENSE
1
INPUT
1B
4
5
LOAD
SUPPLY
REFERENCE
INPUT
2A
INPUT
2B
SENSE
2
OUT
2B
LOGIC
SUPPLY
RC
V
REF
13
12
V
BB
V
CC
V
BB
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
A3968SA
16-pin DIP
—
A3968SLB
16-lead batwing SOIC
—
6
°
C/W
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
Brake Mode
I
User-Selectable Blanking Window
I
Internal Ground-Clamp & Flyback Diodes
I
Internal Thermal-Shutdown Circuitry
I
Crossover-Current Protection and UVLO Protection
ADVANCE INFORMATION
(subject to change without notice)
September 3, 1999
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
A3968SA ...................................
2.08 W*
A3968SLB .................................
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
.
D
2
相關PDF資料 |
PDF描述 |
|---|---|
| A3968SA | DUAL FULL-BRIDGE PWM MOTOR DRIVER WITH BRAKE |
| A3971SLB | Dual DMOS Full-Bridge PWM Driver(用于直流電機，步進電機的雙DMOS全橋脈寬調制驅動器（工作電壓50V，每個橋負載電流容量±2.5A)) |
| A3972 | MODULE RABBITCORE RCM3400 |
| A3972SB | MODULE RABBITCORE RCM3410 |
| A3973SB | DUAL DMOS FULL-BRIDGE MICROSTEPPING PWM MOTOR DRIVER |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| A3968SLB-T | 功能描述:IC MOTOR DRIVER PWM DUAL 16SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 電機和風扇控制器，驅動器 系列:- 標準包裝:1 系列:- 應用:直流電機驅動器，步進電機驅動器 評估套件:- 輸出數(shù):1 或 2 電流 - 輸出:750mA 電壓 - 負載:10 V ~ 40 V 電源電壓:4.5 V ~ 5.5 V 工作溫度:-20°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:24-BFSOP（0.295"，7.50mm 寬） 供應商設備封裝:24-SOP 包裝:Digi-Reel® 其它名稱:MTS62C19A-HS105DKR |
| A3968SLBTR | 功能描述:IC MOTOR DRIVER PWM DUAL 16SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 電機和風扇控制器，驅動器 系列:- 標準包裝:1 系列:- 應用:直流電機驅動器，步進電機驅動器 評估套件:- 輸出數(shù):1 或 2 電流 - 輸出:750mA 電壓 - 負載:10 V ~ 40 V 電源電壓:4.5 V ~ 5.5 V 工作溫度:-20°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:24-BFSOP（0.295"，7.50mm 寬） 供應商設備封裝:24-SOP 包裝:Digi-Reel® 其它名稱:MTS62C19A-HS105DKR |
| A3968SLBTR-T | 功能描述:IC MOTOR DRIVER PWM DUAL 16SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 電機和風扇控制器，驅動器 系列:- 標準包裝:1 系列:- 應用:步進電機驅動器，1-2 相，2 相 評估套件:- 輸出數(shù):1 電流 - 輸出:800mA 電壓 - 負載:10 V ~ 28 V 電源電壓:4.75 V ~ 5.25 V 工作溫度:-20°C ~ 90°C 安裝類型:表面貼裝 封裝/外殼:28-SOP + 2 翼片裸露焊盤 供應商設備封裝:28-HSOPHC（15.2x7.9） 包裝:剪切帶 (CT) 其它名稱:869-1268-1 |
| A3969 | 制造商:ALLEGRO 制造商全稱:Allegro MicroSystems 功能描述:Dual Full-Bridge PWM Motor Driver |
| A3969SET-T | 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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