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| 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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