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參數資料
| 型號： | BU52040HFV-TR |
| 廠商： | Rohm Semiconductor |
| 文件頁數： | 7/15頁 |
| 文件大小： | 465K |
| 描述： | IC HALL EFFECT BIPO LATCH HVSOF5 |
| 特色產品： | ROHM Hall Effect Sensor ICs |
| 標準包裝： | 1 |
| 傳感范圍： | 5mT 跳閘，-5mT 釋放 |
| 類型： | 雙極卡鎖 |
| 電源電壓： | 1.65 V ~ 3.3 V |
| 電流 - 電源： | 300µA |
| 電流 - 輸出（最大）： | ±0.5mA |
| 輸出類型： | 數字，開路集電極 |
| 工作溫度： | -40°C ~ 85°C |
| 封裝/外殼： | SOT-665 |
| 供應商設備封裝： | 5-HVSOF |
| 包裝： | 標準包裝 |
| 其它名稱： | BU52040HFV-DKR BU52040HFV-DKR-ND BU52040HFVDKR |
BU52040HFV
Technical Note
7/12
www.rohm.com
2010.01 - Rev.B
?2010 ROHM Co., Ltd. All rights reserved.
?SPAN class="pst BU52040HFV-TR_2601631_6">Intermittent Operation at Power ON
Fig.17
The Hall Effect IC for wheel keys / trackballs adopts an intermittent operation method in detecting the magnetic field during
startup, as shown in Fig. 17. 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, 1200約. To accommodate the system design, the Hall IC output read should be
programmed within 1200約 of power ON, but after the time allowed for the period ambient temperature and supply voltage.
Additionally, if a magnetic flux density (B) of magnitude greater than B
rp
but less than B
op
is applied at power ON, the output
from the IC remains undefined and will be either high or low until a flux density exceeding the B
op
or B
rp
threshold is applied.
?SPAN class="pst BU52040HFV-TR_2601631_6">Application Example
Wheel Key
Two Hall ICs can enable detection of rotation direction of a magnetic zero-contact wheel key.
Circular magnet
BU52040HFV: 2pcs
Mounting Position of Hall IC Inside Wheel Key
The angular separation of the two Hall ICs within the footprint of the wheel key depends on N/S division angle of the internal
magnet (?, and can be set to either ?4 or 睛. Mounting the two ICs in this position causes the magnetic phase
difference between the ICs to equal ?/4, and the direction of rotation can be detected by measuring the change in this
difference. An example of the magnetic field characteristics for this application is shown in the figure below.
S
N
S
N
S
N
S
N
N/S division angle of circular magnet = ?
Circular Magnet
S
N
N
S
Clockwise
rotation
N
S
N
S
S
S
S
S
N
N
N
N
?
Center of magnet
2) Mounting angle of Hall IC = 睛
Mounting Angle of Hall IC
Hall IC A
?
Hall IC B
3/4 ?
Hall IC A
?
Hall IC B
Center of magnet
1) Mounting angle of Hall IC = ?4
Counterclockwise
rotation
VDD
Startup time
Standby time
Standby time
Startup time
(Intermittent operation)
Indefinite
OUT
N ma netic field resent
Indefinite interval
OUT
(S magnetic field present)
Low
High
Supply current
Indefinite interval
No ma netic field resent
(B
rp
)
(B
op
<B)
(B
rp
<B< B
op
)
OUT
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| BU52051NVX | 制造商:ROHM 制造商全稱:Rohm 功能描述:Omnipolar Detection Hall ICs |
| BU52051NVX-TR | 功能描述:板機接口霍耳效應/磁性傳感器 1.65-5.5V CMOS Out Bipolar Detect Latch RoHS:否 制造商:Honeywell 類型:Bipolar Hall-Effect Digital Position Sensor 工作電源電壓:3 V to 24 V 電源電流:3.5 mA 最大輸出電流:20 mA 工作點最小值/最大值:5 G, 55 G 最小/最大釋放點（Brp）:- 55 G, - 5 G 最大工作溫度:+ 150 C 安裝風格:SMD/SMT 封裝 / 箱體:SOT-23 |
| BU52053NVX | 制造商:ROHM 制造商全稱:Rohm 功能描述:Omnipolar Detection Hall ICs |
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| BU52054GWZ | 制造商:ROHM 制造商全稱:Rohm 功能描述:Omnipolar Detection Hall ICs |
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