BU52004GUL, BU52014HFV
Technical Note
8/11
www.rohm.com
2010.01 - Rev.D
?2010 ROHM Co., Ltd. All rights reserved.
螴ntermittent Operation at Power ON
The dual output Omnipolar detection Hall IC adopts an intermittent operation method in detecting the magnetic field during
startup, as shown in Fig. 25. It outputs to the appropriate terminal based on the detection result and maintains the output
condition during the standby period. The time from power ON until the end of the initial startup period is an indefinite interval,
but it cannot exceed the maximum period, 100ms. To accommodate the system design, the Hall IC output read should be
programmed within 100ms of power ON, but after the time allowed for the period ambient temperature and supply voltage.
螹agnet Selection
Of the two representative varieties of permanent magnet, neodymium generally offers greater magnetic power per volume
than ferrite, thereby enabling the highest degree of miniaturization, Thus, neodymium is best suited for small equipment
applications. Fig. 26 shows the relation between the size (volume) of a neodymium magnet and magnetic flux density. The
graph plots the correlation between the distance (L) from three versions of a 4mm X 4mm cross-section neodymium magnet
(1mm, 2mm, and 3mm thick) and magnetic flux density. Fig. 27 shows Hall IC detection distance a good guide for
determining the proper size and detection distance of the magnet. Based on the BU52014HFV operating point max 5.0 mT,
the minimum detection distance for the 1mm, 2mm and 3mm magnets would be 7.6mm, 9.22mm, and 10.4mm, respectively.
To increase the magnets detection distance, either increase its thickness or sectional area.
X=Y=4mm
t=1mm,2mm,3mm
X
t
Y
&Flux density measuring point
L: Variable
t
Fig.27 Magnet Dimensions and
Flux Density Measuring Point
Magnet size
Magnet
Power ON
VDD
Startup time
Standby time
Standby time
Startup time
(Intermittent action)
Indefinite
OUT
(No magnetic
field present)
Indefinite
(Magnetic
field present)
Low
High
Supply current
Fig.25
0
1
2
3
4
5
6
7
8
9
10
0
2
4
6
8
10
12
14
16
18
20
Distance between magnet and Hall IC [mm]
Fig.26
7.6mm
t=3mm
t=1mm
t=2mm
9.2mm
10.4mm
Magnet material: NEOMAX-44H (material)
Maker: NEOMAX CO.,LTD.
发布紧急采购，3分钟左右您将得到回复。
相关PDF资料
BU52040HFV-TR
IC HALL EFFECT BIPO LATCH HVSOF5
D6B-2P
SENSR TILT 35-65DEG 1MA SMD GUL
D7E-3
SENSOR TILT 50-80DEG 0.1A GRY
DSBA1H
SENSOR TILT SW 30-60DEG 20MA TH
EE-SA103
SENSOR OPTO SLOT 3MM TRANS THRU
EE-SA107-P2
OPTO SENSOR 3.6MM TRANS
EE-SH3-DS
SENS OPTO SLOT 3.4MM TRANS SOLDR
EE-SJ8-B
SENSOR OPTO SLOT 8MM TRANS THRU
相关代理商/技术参数
BU52014HFV-TR-CUT TAPE
制造商:ROHM 功能描述:BU52014HFV Series 3.3 V ?0.5 mA SMT Omnipolar Detection Hall IC - HVSOF-5
BU52015GUL
制造商:ROHM 制造商全称:Rohm 功能描述:Omnipolar Detection Hall ICs
BU52015GUL-E2
功能描述:板机接口霍耳效应/磁性传感器 1.65-3.3V; +/-3.0mT Bipolar Detection RoHS:否 制造商:Honeywell 类型:Bipolar Hall-Effect Digital Position Sensor 工作电源电压:3 V to 24 V 电源电流:3.5 mA 最大输出电流:20 mA 工作点最小值/最大值:5 G, 55 G 最小/最大释放点（Brp）:- 55 G, - 5 G 最大工作温度:+ 150 C 安装风格:SMD/SMT 封装 / 箱体:SOT-23
BU52021HFV
制造商:ROHM 制造商全称:Rohm 功能描述:Omnipolar Detection Hall ICs
BU52021HFV-TR
功能描述:工业霍耳效应/磁性传感器 ULTRA SMALL DETECT SENSOR; 2.4-3.6V RoHS:否 制造商:Honeywell 操作类型: 操作高斯: 工作电源电压: 电流额定值: 封装 / 箱体: 输出下降时间: 工作点最小值/最大值: 安装风格: 最大工作温度: 最小工作温度: 最大输出电流: 封装:
BU52025G
制造商:ROHM Semiconductor 功能描述:Hole IC,Bop=+/-3.7mT,CMOSout,SSOP5
BU52025G-TR
功能描述:板机接口霍耳效应/磁性传感器 2.4-3.6V; +/-3.7mT Bipolar Detection RoHS:否 制造商:Honeywell 类型:Bipolar Hall-Effect Digital Position Sensor 工作电源电压:3 V to 24 V 电源电流:3.5 mA 最大输出电流:20 mA 工作点最小值/最大值:5 G, 55 G 最小/最大释放点（Brp）:- 55 G, - 5 G 最大工作温度:+ 150 C 安装风格:SMD/SMT 封装 / 箱体:SOT-23
BU52025G-TR-CUT TAPE
制造商:ROHM 功能描述:Silicon Monolithic Integrated Circuit, Hall Effet Switch