- 您现在的位置：买卖IC网 > PDF目录16789 > APEK4987SLP-01-T (Allegro Microsystems Inc)BOARD EVAL MOTOR CONTROL A4987 PDF资料下载
参数资料
| 型号： | APEK4987SLP-01-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 9/17页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL MOTOR CONTROL A4987 |
| 标准包装： | 1 |
| 主要目的： | 电源管理，电机控制，步进控制器 |
| 嵌入式： | 否 |
| 已用 IC / 零件： | A4987 |
| 已供物品： | 板 |
| 相关产品： | 620-1404-2-ND - IC STEPPER MOTOR DRIVER 24QFN 620-1345-2-ND - IC STEPPER MOTOR DRIVER 24TSSOP |
| 其它名称： | 620-1375 |
A4987
DMOS Dual Full-Bridge PWM Motor Driver
With Overcurrent Protection
Application Layout
Layout . The printed circuit board should use a heavy ground-
plane. For optimum electrical and thermal performance, the
A4987 must be soldered directly onto the board. On the under-
side of the A4987 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 A4987, 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 capaci-
tor (CIN1) should be closer to the pins than the bulk capacitor
(CIN2). This is necessary because the ceramic capacitor will be
responsible for delivering the high frequency current components.
The sense resistors, R Sx , 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 R Sx 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
A4987
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
R5
GND
C7
R4
R5
C7
U1
OUT2B
PH2
GND
PAD
OUT1B
PH1
GND
C3
C4
C6
C1
BULK
GND
C3
C4
CP1
CP2
VCP
A4987
REF
IN01
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
9
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
相关PDF资料 |
PDF描述 |
|---|---|
| V300B12E150BF3 | CONVERTER MOD DC/DC 12V 150W |
| B78108S1223K | CHOKE RF 22UH 560MA AXIAL |
| V300B12E150BF | CONVERTER MOD DC/DC 12V 150W |
| 202K142-12-01-0 | BOOT MOLDED |
| EBM24DRES | CONN EDGECARD 48POS .156 EYELET |
相关代理商/技术参数 |
参数描述 |
|---|---|
| APEK4987SLP-01-T-DK | 功能描述:A4987 - Power Management, Motor Control, Stepper Evaluation Board 制造商:allegro microsystems, llc 系列:- 零件状态:有效 主要用途:电源管理，电机控制，步进控制器 嵌入式:否 使用的 IC/零件:A4987 主要属性:- 辅助属性:- 所含物品:板 标准包装:1 |
| APEK4988SET-01-T-DK | 功能描述:A4988 - Power Management, Motor Control, Stepper Evaluation Board 制造商:allegro microsystems, llc 系列:- 零件状态:有效 主要用途:电源管理，电机控制，步进控制器 嵌入式:- 使用的 IC/零件:A4988 主要属性:- 辅助属性:- 所含物品:板 标准包装:1 |
| APEK4989SLD-01-T | 制造商:Allegro MicroSystems LLC 功能描述: |
| APEK4989SLD-01-T-DK | 功能描述:A4989 - Power Management, Motor Control, Stepper Evaluation Board 制造商:allegro microsystems, llc 系列:- 零件状态:有效 主要用途:电源管理，电机控制，步进控制器 嵌入式:- 使用的 IC/零件:A4989 主要属性:- 辅助属性:- 所含物品:板 标准包装:1 |
| APEK5940GEJ-01-T-DK | 功能描述:BOARD EVAL FOR A5940GEJ 制造商:allegro microsystems, llc 系列:- 零件状态:有效 标准包装:1 |
发布紧急采购，3分钟左右您将得到回复。