参数资料
型号: A1448EEWLT-P
厂商: Allegro Microsystems Inc
文件页数: 6/9页
文件大小: 0K
描述: IC MOTOR DVR BLDC FULLBRDG MLP
产品变化通告: Pre-EOL Notice 07/Feb/2012
标准包装: 1
应用: DC 电机驱动器,无刷(BLDC)
输出数: 1
电流 - 输出: ±200mA
电源电压: 1.8 V ~ 4.2 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 6-XFDFN 裸露焊盘
供应商设备封装: 6-MLP/DFN 裸露焊盘(1.5x2)
包装: 标准包装
产品目录页面: 1140 (CN2011-ZH PDF)
其它名称: 620-1274-6
Low-Voltage, Full-Bridge Brushless DC Motor Driver with
A1448
Integrated Hall Sensor IC, PWM Speed Control, Soft-Switching,
and Reverse Battery and Short Circuit Protection
Application Information
Figure 2 shows a typical vibration motor application in which
speed control, active braking, and sleep mode are required on the
CONTROL pin.
Figure 3 shows an application circuit in which 100% duty cycle
is required. Tying the CONTROL pin to V DD disables the braking
function and the sleep mode. The user must control supply in
order to control the speed of the motor. This represents a 2-wire
motor design.
V BATT
Note that:
? No external diode is required for reverse battery protection
because the protection is fully integrated into the IC.
? Thermal shutdown also is integrated, to protect the device
against inadvertent output shorts during manufacturing or
testing.
? A bypass capacitor of 0.1 μ F is required. This capacitor is usu-
ally included on the end user PCB and therefore not necessary
on the motor PCB.
VDD
VOUT2
System Logic
Control
I/O
C BYP
A1448
CONTROL
NC
VOUT1
GND
M
Figure 2. Three-wire vibration motor application circuit
V BATT
VDD
A1448
VOUT2
M
C BYP
CONTROL
NC
VOUT1
GND
Figure 3. Two-wire vibration motor application circuit
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
5
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