參數(shù)資料
型號(hào)： 3968
廠商： Allegro MicroSystems, Inc.
英文描述： DIODE SWITCHING SINGLE 70V 250mA-Io 150mW 4ns-trr SOT-523 3K/REEL
中文描述： 雙全橋PWM電機(jī)驅(qū)動(dòng)器，帶有剎車(chē)
文件頁(yè)數(shù)： 1/12頁(yè)
文件大小： 140K
代理商： 3968
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(guān)PDF資料
PDF描述
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
3974 DMOS DUAL FULL-BRIDGE PWM MOTOR DRIVER
3976 DIODE SWITCHING TRIPLE ISOLATED 70V 250mA-Io 200mW 4ns-trr SOT-363 3K/REEL
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
3968_03 制造商:ALLEGRO 制造商全稱(chēng):Allegro MicroSystems 功能描述:DUAL FULL-BRIDGE PWM MOTOR DRIVER WITH BRAKE
39680 功能描述:HORIZ LONG PARTITION 446-HLP RoHS:是 類(lèi)別:靜電控制，ESD，無(wú)塵室產(chǎn)品 >> 配件 系列:- 標(biāo)準(zhǔn)包裝:1 系列:durAstatic™ 附件類(lèi)型:瓶 適用于相關(guān)產(chǎn)品:液體 技術(shù)規(guī)格:8盎司，耗散，綠色，包含手扣式噴頭
3-968152-2 制造商:TE Connectivity 功能描述:
39682 功能描述:HORIZ SHORT PARTITION 446-HSP RoHS:是 類(lèi)別:靜電控制，ESD，無(wú)塵室產(chǎn)品 >> 配件 系列:- 標(biāo)準(zhǔn)包裝:1 系列:durAstatic™ 附件類(lèi)型:瓶 適用于相關(guān)產(chǎn)品:液體 技術(shù)規(guī)格:8盎司，耗散，綠色，包含手扣式噴頭
3-968214-1 制造商:TE Connectivity 功能描述:
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*