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參數(shù)資料
| 型號(hào)： | 3952 |
| 廠商： | Allegro MicroSystems, Inc. |
| 英文描述： | DIODE SWITCHING DUAL ISOLATED 75V 250mA-Io 200mW 4ns-trr SOT-363 3K/REEL |
| 中文描述： | 全橋PWM電機(jī)驅(qū)動(dòng) |
| 文件頁數(shù)： | 1/16頁 |
| 文件大?。?/td> | 195K |
| 代理商： | 3952 |
D
2
FULL-BRIDGE PWM MOTOR DRIVER
Designed for bidirectional pulse-width modulated current control of
inductive loads, the A3952S– is capable of continuous output currents
to
±
2 A and operating voltages to 50 V. Internal fixed off-time PWM
current-control circuitry can be used to regulate the maximum load
current to a desired value. The peak load current limit is set by the
user’s selection of an input reference voltage and external sensing
resistor. The fixed OFF-time pulse duration is set by a user-selected
external RC timing network. Internal circuit protection includes thermal
shutdown with hysteresis, transient suppression diodes, and crossover-
current protection. Special power-up sequencing is not required.
With the ENABLE input held low, the PHASE input controls load
current polarity by selecting the appropriate source and sink driver pair.
The MODE input determines whether the PWM current-control circuitry
operates in a slow current-decay mode (only the selected sink driver
switching) or in a fast current-decay mode (selected source and sink
switching). A user-selectable blanking window prevents false triggering
of the PWM current control circuitry. With the ENABLE input held high,
all output drivers are disabled. A sleep mode is provided to reduce
power consumption when inactive.
When a logic low is applied to the BRAKE input, the braking
function is enabled. This overrides ENABLE and PHASE to turn OFF
both source drivers and turn ON both sink drivers. The brake function
can be safely used to dynamically brake brush dc motors.
The A3952S– is supplied in a choice of four power packages. In all
package styles, the batwing/power tab is at ground potential and needs
no isolation. These devices are also available for operation from -40
°
C
to +125
°
C. To order, change the suffix from 'S–' to 'K–'.
FEATURES
±
2 A Continuous Output Current Rating
I
50 V Output Voltage Rating
I
Internal PWM Current Control
I
Fast and Slow Current-Decay Modes
I
Sleep (Low Current Consumption) Mode
I
Internal Transient Suppression Diodes
I
Under-Voltage Lockout
I
Internal Thermal Shutdown Circuitry
I
Crossover-Current Protection
I
Always order by complete part number:
Part Number
Package
R
θ
JA
R
θ
JT
A3952SB
A3952SEB
A3952SLB
A3952SW
16-Pin DIP
28-Lead PLCC
16-Lead SOIC
12-Pin Power-Tab SIP
43
°
C/W
42
°
C/W
67
°
C/W
36
°
C/W
6.0
°
C/W
6.0
°
C/W
6.0
°
C/W
2.0
°
C/W
A3952SB
Note that the A3952SB (DIP) and the A3952SLB
(SOIC) are electrically identical and share a
common terminal number assignment.
ABSOLUTE MAXIMUM RATINGS
Load Supply Voltage, V
BB
..................
50 V
Output Current, I
OUT
(t
w
≤
20
μ
s)..................................
±
3.5 A
(Continuous) ...............................
±
2.0 A
Logic Supply Voltage, V
CC
.................
7.0 V
Logic Input Voltage Range,
V
IN
.......................
-0.3 V to V
CC
+ 0.3 V
Sense Voltage, V
SENSE
......................
1.5 V
Reference Voltage, V
REF
....................
15 V
Package Power Dissipation,
P
D
.......................................
See Graph
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, heat sinking and/or forced
cooling. Under any set of conditions, do not
exceed the specified current rating or a junction
temperature of +150
°
C.
* Fault conditions that produce excessive junction
temperature will activate device thermal shutdown
circuitry. These conditions can be tolerated but
should be avoided.
3952
MODE
GROUND
GROUND
LOGIC
SUPPLY
PHASE
GROUND
GROUND
RC
SENSE
LOAD
SUPPLY
Dwg. PP-056
BRAKE
REF
LOAD
SUPPLY
V
CC
OUTB
OUTA
V
BB
V
BB
LOGIC
ENABLE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 395200002 | 制造商:Molex 功能描述:Conn Eurostyle Block F 2 POS 5mm Screw RA Cable Mount 15A/Contact |
| 39520-0002 | 功能描述:可插拔接線端子 5.0MM EURO PLUG RA BLK 2CKT RoHS:否 制造商:Phoenix Contact 產(chǎn)品:Plugs 系列:PTS 端接類型:Spring Cage 位置/觸點(diǎn)數(shù)量:5 線規(guī)量程:26-14 節(jié)距:5 mm 電流額定值:10 A 電壓額定值:250 V 安裝風(fēng)格: 安裝角: 觸點(diǎn)電鍍: |
| 395200003 | 制造商:Molex 功能描述: |
| 39520-0003 | 功能描述:可插拔接線端子 5.0MM EURO PLUG RA BLK 3CKT RoHS:否 制造商:Phoenix Contact 產(chǎn)品:Plugs 系列:PTS 端接類型:Spring Cage 位置/觸點(diǎn)數(shù)量:5 線規(guī)量程:26-14 節(jié)距:5 mm 電流額定值:10 A 電壓額定值:250 V 安裝風(fēng)格: 安裝角: 觸點(diǎn)電鍍: |
| 395200004 | 制造商:Molex 功能描述: |
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