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参数资料
| 型号： | APEK4986SLP-01-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 7/17页 |
| 文件大小： | 0K |
| 描述： | Board Eval Motor Control A4986 |
| 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： | A4986 |
| 已供物品： | 板 |
| 相关产品： | 620-1342-2-ND - IC PWM MOTOR DRIVER 24TSSOP |
| 其它名称： | 620-1376 |
A4986
DMOS Dual Full-Bridge PWM Motor Driver
With Overcurrent Protection
source-side FET gates. A 0.1 μ F ceramic capacitor, should be
connected between CP1 and CP2. In addition, a 0.1 μ F ceramic
capacitor is required between VCP and VBB, to act as a reservoir
for operating the high-side FET gates.
Capacitor values should be Class 2 dielectric ±15% maximum,
or tolerance R, according to EIA (Electronic Industries Alliance)
specifications.
V REG (VREG) . This internally-generated voltage is used to
operate the sink-side FET outputs. The nominal output voltage
of the VREG terminal is 7 V. The VREG pin must be decoupled
with a 0.22 μ F ceramic capacitor to ground. V REG is internally
monitored. In the case of a fault condition, the FET outputs of the
A4986 are disabled.
Capacitor values should be Class 2 dielectric ±15% maximum,
or tolerance R, according to EIA (Electronic Industries Alliance)
specifications.
5 A / div.
t →
Figure 1. Short-to-ground event
Fault
latched
Shutdown. In the event of a fault, overtemperature (excess T J )
or an undervoltage (on VCP), the FET outputs of the A4986 are
disabled until the fault condition is removed. At power-on, the
UVLO (undervoltage lockout) circuit disables the FET outputs
and resets the translator to the Home state.
Sleep Mode ( ˉSˉ ˉLˉ ˉEˉ ˉEˉ ˉPˉ ). To minimize power consumption
when the motor is not in use, this input disables much of the
internal circuitry including the output FETs, current regulator, and
charge pump. A logic low on the SLEEP pin puts the A4986 into
Sleep mode. When emerging from Sleep mode, in order to allow
the charge pump to stabilize, provide a delay of 1 ms before issu-
ing a logic command.
Mixed Decay Operation. The bridge operates in Mixed
Decay mode, as shown in figures 5 through 7. As the trip point
5 A / div.
Fixed off-time
t →
Figure 2. Shorted load (OUTxA → OUTxB) in
Slow decay mode
is reached, the A4986 initially goes into a fast decay mode for
31.25% of the off-time, t OFF . After that, it switches to Slow Decay
mode for the remainder of t OFF . A timing diagram for this feature
appears in figure 4.
Synchronous Rectification . When a PWM-off cycle is
triggered by an internal fixed-off time cycle, load current recir-
culates in Mixed Decay mode. This synchronous rectification
5 A / div.
Fixed off-time
feature turns on the appropriate FETs during current decay, and
effectively shorts out the body diodes with the low FET R DS(ON) .
This reduces power dissipation significantly, and can eliminate
the need for external Schottky diodes in many applications. Syn-
chronous rectification turns off when the load current approaches
zero (0 A), preventing reversal of the load current.
Fast decay portion
(direction change)
t →
Figure 3. Shorted load (OUTxA → OUTxB) in Mixed decay mode
Allegro MicroSystems, LLC
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
7
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参数描述 |
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| APEK4986SLP-01-T-DK | 功能描述:A4986 - 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:A4986 主要属性:- 辅助属性:- 所含物品:板 标准包装:1 |
| APEK4987SLP-01-T | 功能描述:BOARD EVAL MOTOR CONTROL A4987 RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:- 标准包装:1 系列:PSoC® 主要目的:电源管理，热管理 嵌入式:- 已用 IC / 零件:- 主要属性:- 次要属性:- 已供物品:板，CD，电源 |
| 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: |
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