A1448

更新时间： 2024-01-15 12:40:22

品牌	Logo	应用领域
急速微 - ALLEGRO		驱动器开关传感器
页数	文件大小	规格书
7页	176K
描述
Low-Voltage, Full-Bridge Brushless DC Motor Driver with Integrated Hall Sensor IC, PWM Speed Control, Soft-Switching

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A1448 技术参数

是否Rohs认证：	符合	生命周期：	Obsolete
零件包装代码：	SON	包装说明：	HVSON, SOLCC6,.08,20
针数：	6	Reach Compliance Code：	unknown
ECCN代码：	EAR99	HTS代码：	8542.39.00.01
风险等级：	8.62	Is Samacsys：	N
模拟集成电路 - 其他类型：	BRUSHLESS DC MOTOR CONTROLLER	JESD-30 代码：	R-PDSO-N6
JESD-609代码：	e4	长度：	2 mm
湿度敏感等级：	1	功能数量：	1
端子数量：	6	最高工作温度：	85 °C
最低工作温度：	-40 °C	最大输出电流：	0.4 A
封装主体材料：	PLASTIC/EPOXY	封装代码：	HVSON
封装等效代码：	SOLCC6,.08,20	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE	峰值回流温度（摄氏度）：	260
电源：	1.8/4.2 V	认证状态：	Not Qualified
座面最大高度：	0.4 mm	子类别：	Motion Control Electronics
最大供电电流 (Isup)：	6 mA	最大供电电压 (Vsup)：	4.2 V
最小供电电压 (Vsup)：	2 V	标称供电电压 (Vsup)：	3 V
表面贴装：	YES	技术：	CMOS
温度等级：	INDUSTRIAL	端子面层：	Nickel/Palladium/Gold (Ni/Pd/Au)
端子形式：	NO LEAD	端子节距：	0.5 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	40
宽度：	1.5 mm	Base Number Matches：	1

A1448 数据手册

A1448

Low-Voltage, Full-Bridge Brushless DC Motor Driver with

Integrated Hall Sensor IC, PWM Speed Control, Soft-Switching,

and Reverse Battery and Short Circuit Protection

Features and Benefits

Description

▪ Low-voltage operation, 1.8 to 4.2 V

The A1448 is a full-bridge motor driver designed to drive

low-voltage, brushless DC motors. The device is designed

to allow the user to control several functions with a single

input control pin. The pin allows for direct input PWM for

speed control, is used to initiate the active braking func-

tion to reduce motor stop time, and acts as an enable pin to

engage micro-power sleep mode to reduce average power

consumption when not in use. The A1448 is designed for

use in vibration motor applications in portable devices that

require fast stop-start cycles, such as haptic applications and

vibration ring tones.

▪ Multifunction CONTROL pin input:

▫ Direct input PWM for speed control

▫ Active braking for fast stop cycle

▫ Sleep function to reduce average power consumption

▪ Reverse voltage protection on VDD and CONTROL pins

▪ Output thermal shutdown protection for robust performance

▪ Soft switching algorithm to reduce audible switching noise

and EMI

▪ Hall chopper stabilization technique for precise signal

response over operating range

▪ Antistall feature guarantees continuous rotation and

prevents overheating

▪ Single-chip solution for high reliability

▪ Miniature MLP/DFN package with industry-leading

0.40 mm maximum overall thickness

Commutation of the motor is achieved by use of a single

Hall element to detect the rotational position of an alternat-

ing-pole ring magnet. A high density CMOS semiconductor

process allows the integration of all the necessary electron-

ics. This includes the Hall element, the motor control cir-

cuitry, and the output full bridge. Low-voltage design tech-

niques have been employed to achieve full device function-

ality down to 1.8 V V_DD. This fully integrated single chip

solution provides enhanced reliability (including reverse

battery protection and output short circuit protection) and

eliminates the need for any external support components.

Package:

6-contact MLP/DFN

1.5 mm × 2 mm

0.40 mm maximum overall height

(EW package)

The A1448 employs a soft-switching algorithm to reduce

audible switching noise and EMI interference. The micro-

power sleep mode can be initiated on the CONTROL pin,

and reduces current consumption for battery management in

Approximate size

Continued on the next page…

Functional Block Diagram

VDD

Reverse Battery

ESD

To All Subcircuits

Full Bridge

Active Braking

Sleep Mode

CONTROL

Drive

Logic

VOUT1

VOUT2

PWM Control

ESD

Amp

Stall Detection

Thermal Shutdown

Protection

GND

1448-DS, Rev. 3

12 3 4 5 6 7

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A1448EEWLT-P	ALLEGRO	Low-Voltage, Full-Bridge Brushless DC Motor Driver with Integrated Hall Sensor IC, PWM Spe	获取价格
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