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参数资料
| 型号： | US4881LUA-AAA-000-BU |
| 厂商： | Melexis Technologies NV |
| 文件页数： | 26/46页 |
| 文件大小： | 498K |
| 描述： | IC LATCH CMOS H-S TO-92UA |
| 产品目录绘图： | UA-92 Series Side |
| 标准包装： | 1,000 |
| 传感范围： | 6mT 跳闸，-6mT 释放 |
| 类型： | 双极卡锁 |
| 电源电压： | 2.2 V ~ 18 V |
| 电流 - 电源： | 5mA |
| 电流 - 输出（最大）： | 50mA |
| 输出类型： | 数字式，开漏极 |
| 工作温度： | -40°C ~ 150°C |
| 封装/外壳： | TO-226-3，TO-92-3 短体 |
| 供应商设备封装： | TO-92UA |
| 包装： | 散装 |
| 产品目录页面： | 2792 (CN2011-ZH PDF) |
| 其它名称： | US4881LUA US4881LUA-ND |
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Section 3 - Applications
3-34
The Push-Pull Method
Graph 10 shows the push-pull method. A South magnetic pole, perpendicular to the branded face, is used
in conjunction with a North magnetic pole at the opposite face. The two magnets in the single-pole slide-
by configuration are moved in the X-direction with respect to a stationary Hall IC.
Graph 10, Push-Pull Activation Using Slide-by Method with Magnet A
The Push-Push Method
The push-push method is similar in configuration to push-pull, but requires a South pole located at the
branded face along with a South pole at the opposite side of the Hall IC. When the Hall IC is centered
between these two South magnetic poles, their flux density cancels out leaving zero flux density at this
position. If the two magnets maintain the same distance between each other and are moved in the head-
on method in either direction, the flux vs. distance graph will be linear.
Graph 11, Push-Push Activation Using Head-On Mode
The US3881EUA Hall Effect Latch has maximum BOP of 90 Gauss and a minimum BRP of -90Gauss
over the temperature range of -400C to 850C. Due to the temperature coefficient of -0.1098%/0C, the
magnet will have a difference in flux density of 8% over this distance range. The distance necessary to
fully actuate a US3881EUA Hall Effect Latch is approximately 0.35mm from max. BOP to min. BRP.
This is an extremely large increase in performance from the previous example.
-200
0
200
400
600
800
1000
1200
1400
-15 -13 -11
-9 -7
-5 -3
-1
1
3
5
7
9
11 13 15
Distance (mm)
S
N
S
N
M
ot
ion
M
o
tio
n
M
oti
on
M
ot
ion
The Air Gap for
both magnets is
approximately 6.3mm
-350
-300
-250
-200
-150
-100
-50
0
50
100
150
200
250
300
350
-1
-0.75
-0.5
-0.25
0
0.25
0.5
0.75
1
Distance (mm)
Temp = 25
o
C
Temp = -40
o
C
Temp = 85
o
C
Max. Bop
Min. Brp
Gauss
B
OP
B
RP
B
hys
Maximum
90
-10
100
Minimum
10
-90
100
The Air Gap for
both magnets is
approximately 3mm
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