Datasheet > AH287_09

AH287_09

更新时间： 2022-12-26 20:10:31

品牌	Logo	应用领域
BCDSEMI		/
页数	文件大小	规格书
12页	436K
描述
TWO PHASE HALL EFFECT LATCH WITH LOCKED PROTECTION

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AH287_09 数据手册

Data Sheet

TWO PHASE HALL EFFECT LATCH WITH LOCKED PROTECTION

AH287

Features

General Description

•

On-chip Hall Sensor

Operating Voltage: 3.5V to 18V

Maximum Output Current: 350mA (ave)

Rotor-locked Protection

The AH287 is an integrated Hall sensor with output

drivers for brushless DC motor application. This IC

consists of two complementary outputs for motor’s

coil driving and has automatic lock protection and

auto- restart function relatively. To avoid coil burning,

rotor lock shutdown protection circuit shut down the

output driver if the rotor blocked and then the

automatic recovery circuit will try to restart the motor.

This function repeats while rotor is blocked. Until the

blocking is removed, the motor recovers running

normally. In addition, the auto-restart time is flexible

by adjusting the capacitance (C_CT).

Automatic Restart

Adjustable Auto-restart Time

Internal Band-gap Regulator for Temperature

Compensation

Operating Temperature: -20˚C to 85˚C

Low Profile TO-94 Package

•

ESD Rating: 300V (Machine Model)

Placing the device in a variable magnetic field, if the

magnetic flux density is larger than threshold B_OP, the

DO is turned to sink and DOB is turned to drive. This

output state is held until a magnetic flux density

reversal falls below B_RP, causing DO to be turned to

drive and DOB turned to sink.

Application

•

Dual-coil Brushless DC Fan

This IC is available in TO-94 package.

TO-94

Figure 1. Package Type of AH287

Oct. 2009 Rev. 1. 3

BCD Semiconductor Manufacturing Limited

12 3 4 5 6 7...12

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