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参数资料
| 型号： | A4984SLPTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 12/22页 |
| 文件大小： | 0K |
| 描述： | IC STEPPER MOTOR DRIVER 24TSSOP |
| 特色产品： | A498x Motor Driver Family |
| 标准包装： | 1 |
| 应用： | 步进电机驱动器 |
| 评估套件： | 可供 |
| 输出数： | 1 |
| 电流 - 输出： | ±2A |
| 电压 - 负载： | 8 V ~ 35 V |
| 电源电压： | 3 V ~ 5.5 V |
| 工作温度： | -20°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-TSSOP（0.173"，4.40mm）裸露焊盘 |
| 供应商设备封装： | 24-TSSOP 裸露焊盘 |
| 包装： | 标准包装 |
| 其它名称： | 620-1341-6 |
A4984
DMOS Microstepping Driver with Translator
And Overcurrent Protection
Application Layout
Layout . The printed circuit board should use a heavy ground-
plane. For optimum electrical and thermal performance, the
A4984 must be soldered directly onto the board. On the under-
side of the A4984 package is an exposed pad, which provides a
path for enhanced thermal dissipation. The thermal pad should be
soldered directly to an exposed surface on the PCB. Thermal vias
are used to transfer heat to other layers of the PCB.
In order to minimize the effects of ground bounce and offset
issues, it is important to have a low impedance single-point
ground, known as a star ground , located very close to the device.
By making the connection between the pad and the ground plane
directly under the A4984, that area becomes an ideal location for
a star ground point. A low impedance ground will prevent ground
bounce during high current operation and ensure that the supply
voltage remains stable at the input terminal.
The two input capacitors should be placed in parallel, and as close
to the device supply pins as possible. The ceramic capacitor (C7)
should be closer to the pins than the bulk capacitor (C2). This
is necessary because the ceramic capacitor will be responsible
for delivering the high frequency current components.The sense
resistors, RSx , should have a very low impedance path to ground,
because they must carry a large current while supporting very
accurate voltage measurements by the current sense comparators.
Long ground traces will cause additional voltage drops, adversely
affecting the ability of the comparators to accurately measure the
current in the windings. The SENSEx pins have very short traces
to the RSx resistors and very thick, low impedance traces directly
to the star ground underneath the device. If possible, there should
be no other components on the sense circuits.
PCB
A4984
Solder
Trace (2 oz.)
Signal (1 oz.)
Ground (1 oz.)
Thermal (2 oz.)
OUT2B
OUT2A OUT1A
OUT1B
Thermal Vias
GND
OUT2B
OUT2A
OUT1A
OUT1B
R4
C7
U1
R5
GND
R4
C7
OUT2B
ENABLE
GND
PAD
R5
OUT1B
DIR
GND
C3
C4
C6
C1
BULK
GND
C3
C4
CP1
CP2
VCP
A4984
REF
STEP
VDD
C1
GND
ROSC
C2
VDD
VBB
CAPACITANCE
C6
ROSC
C2
ES package configuration shown
V DD
Allegro MicroSystems, LLC
115 Northeast Cutoff, Box 15036
V BB
12
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| A4985 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:DMOS Microstepping Driver with Translator And Overcurrent Protection |
| A4985_12 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:DMOS Microstepping Driver with Translator And Overcurrent Protection |
| A49854-000 | 制造商:TE Connectivity 功能描述:7528L1024-0 |
| A4985SESTR-T | 功能描述:IC STEPPER MOTOR DRIVER 24QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电机和风扇控制器，驱动器 系列:- 标准包装:1 系列:- 应用:步进电机驱动器，1-2 相，2 相 评估套件:- 输出数:1 电流 - 输出:800mA 电压 - 负载:10 V ~ 28 V 电源电压:4.75 V ~ 5.25 V 工作温度:-20°C ~ 90°C 安装类型:表面贴装 封装/外壳:28-SOP + 2 翼片裸露焊盘 供应商设备封装:28-HSOPHC（15.2x7.9） 包装:剪切带 (CT) 其它名称:869-1268-1 |
| A4985SETTR-T | 功能描述:IC STEPPER MOTOR DRIVER 32QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电机和风扇控制器，驱动器 系列:- 标准包装:1 系列:- 应用:步进电机驱动器，1-2 相，2 相 评估套件:- 输出数:1 电流 - 输出:800mA 电压 - 负载:10 V ~ 28 V 电源电压:4.75 V ~ 5.25 V 工作温度:-20°C ~ 90°C 安装类型:表面贴装 封装/外壳:28-SOP + 2 翼片裸露焊盘 供应商设备封装:28-HSOPHC（15.2x7.9） 包装:剪切带 (CT) 其它名称:869-1268-1 |
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