- 您现在的位置：买卖IC网 > PDF目录16640 > A4970GLBTR-T (Allegro Microsystems Inc)IC PWM MOTOR DVR FULL 24-SOICW PDF资料下载
参数资料
| 型号： | A4970GLBTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 6/9页 |
| 文件大小： | 0K |
| 描述： | IC PWM MOTOR DVR FULL 24-SOICW |
| 特色产品： | A4970 Motor Driver IC |
| 标准包装： | 1 |
| 应用： | 直流电机驱动器，PWM 电机驱动器，步进电机驱动器 |
| 输出数： | 1 或 2 |
| 电流 - 输出： | 750mA |
| 电压 - 负载： | 7.45 V ~ 45 V |
| 电源电压： | 4.75 V ~ 5.25 V |
| 工作温度： | -40°C ~ 105°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 24-SOIC W |
| 包装： | 标准包装 |
| 其它名称： | 620-1436-6 |
A4970
LOGIC CONTROL OF OUTPUT CURRENT
Dual Full-Bridge Motor Driver
l 0 I 1
V REF /10 R S = I TRIP
V REF /15 R S = 2/3 I TRIP
V REF /30 R S = 1/3 I TRIP
Two logic level inputs (I 0 and I 1 ) allow digital selection of the motor
winding current at 100%, 67%, 33%, or 0% of the maximum level per the
table. The 0% output current condition turns off all drivers in the bridge and
can be used as an OUTPUT ENABLE function.
CURRENT-CONTROL TRUTH TABLE
Output Current
L L
H L
L H
quence. This is accomplished by digitally selecting
100% drive current when only one phase is on and
67% drive current when two phases are on. Logic
highs on both I 0 and I 1 turn-off all drivers to allow
rapid current decay when switching phases. This
helps to ensure proper motor operation at high step
rates.
The logic control inputs can also be used to
select a reduced current level (and reduced power
dissipation) for "hold" conditions and/or increased
current (and available torque) for start-up condi-
tions.
H
H
0
GENERAL
V
FROM
μ P
θ 2
V REF
MOTOR
V CC
R S
These logic level inputs greatly enhance the implementation of microprocessor
controlled drive formats.
During half-step operations, the I 0 and I 1 allow the microprocessor to
control the motor at a constant torque between all positions in an eight-step se-
TYPICAL APPLICATION
BB
1 24
+
2 23
C C
3 22
R C R S
4 21
5 20
56 k 820 pF
R T C T 6 19
STEPPER
7 18
8 17
+5 V
9 16
The PHASE input to each bridge determines
the direction motor winding current ? ows. An in-
ternally generated dead time (approximately 2 μ s)
prevents crossover currents that can occur when
switching the PHASE input.
All four drivers in the bridge output can be
turned-off between steps (I 0 = I 1 ≥ 2.4 V), result-
ing in a fast current decay through the internal
output clamp and ? yback diodes. The fast current
decay is desirable in half-step and high-speed ap-
plications. The PHASE, I 0 ,and I 1 inputs ? oat high.
Varying the reference voltage, V REF , pro-
vides continuous control of the peak load current
for micro-stepping applications.
Thermal protection circuitry turns-off all
drivers when the junction temperature reaches
+170°C. It is only intended to protect the device
from failures due to excessive junction tempera-
ture and should not imply that output short circuits
are permitted. The output drivers are re-enabled
when the junction temperature cools to +145°C.
The A4970 output drivers are optimized for
500 mA operating current. Under normal operat-
ing conditions, when combined with the excellent
thermal properties of the package designs, this
allows continuous operation of both bridges simul-
taneously at 500 mA.
56 k
R T
820 pF
C T V
FROM
REF
10
11
12
θ 1
15
14
13
R C
C C
TRUTH TABLE
μ P
PHASE
H
L
OUT A
H
L
Allegro MicroSystems, LLC
115 Northeast Cutoff
OUT B
L
H
6
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
相关PDF资料 |
PDF描述 |
|---|---|
| V24C5C100BF3 | CONVERTER MOD DC/DC 5V 100W |
| 2-1625812-0 | INDUCTOR 10UH 3.3A SMD |
| EEM43DRSN-S288 | CONN EDGECARD 86POS .156 EXTEND |
| SCRH104R-470 | INDUCTOR SMD 47UH 2.10A 100KHZ |
| V24C12E150BF | CONVERTER MOD DC/DC 12V 150W |
相关代理商/技术参数 |
参数描述 |
|---|---|
| A4970SLBTR-T | 功能描述:IC PWM MOTOR DVR FULL 24-SOICW RoHS:是 类别:集成电路 (IC) >> PMIC - 电机和风扇控制器，驱动器 系列:- 产品变化通告:ATA683(3,4)PLQW Obsolescence 09/Aug/2012 标准包装:1 系列:- 应用:DC 电机控制器，无刷（BLDC），3 相 评估套件:可供 输出数:1 电流 - 输出:100mA 电压 - 负载:5.25 V ~ 20 V 电源电压:5.25 V ~ 20 V 工作温度:-40°C ~ 150°C 安装类型:表面贴装 封装/外壳:48-VFQFN 裸露焊盘 供应商设备封装:48-VQFN（7x7） 包装:剪切带 (CT) 其它名称:ATA6833-PLQWCT |
| A49721-000 | 制造商:TE Connectivity 功能描述:Shrink Boot Adapters 90 制造商:TE Connectivity 功能描述:HEX40-AB-90-15-A5-3 - Bulk |
| A4972-6-02 | 制造商:Esna Technologies 功能描述: |
| A4973 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:Full-Bridge PWM Motor Driver |
| A497-3982-01 | 制造商:Bel Fuse 功能描述: 制造商:BELFUSE 功能描述: |
发布紧急采购，3分钟左右您将得到回复。