参数资料
型号: 12217
厂商: NVE Corp/Sensor Products
文件页数: 42/145页
文件大小: 0K
描述: MAGNET 3.5MM DIA X 4MM THICK
标准包装: 10
系列: *
其它名称: Q7078272A
GMR Switch Precision Digital Sensors
Output Transistor Current in Short Circuit mode:
Output Transistor Current in Short Circuit
300
200
100
t
2
t 1
Time
Notes:
1.
2.
3.
4.
5.
The t 2 Capacitor is used to delay the startup of the SCP circuitry in order to avoid triggering the SCP circuitry on normal
startup transients: see t 2 on the graph above. Typical value is 16V, 0.001 μ F, for a 35 μ s delay.
The t 1 Capacitor is used to set the “Off” time of the SCP circuitry; see t 1 on the graph above. Typical value is 16V, 0.01 μ F,
for a 15 ms Off time.
The voltage across R SHORT is monitored by the IC. If this voltage exceeds 145 mV (typical), the SCP circuitry is activated.
Typical value of R SHORT is 0.47 ? , 1/16 watt. This will result in SCP circuitry turning on at about 300 mA of output current.
R BIAS1 and R BIAS2 are used to bias the output transistor. Typical values for R BIAS1 and R BIAS2 are 16k ? and 3k ? ,
respectively, to supply 1 mA drive to the output transistor.
R LED is sized for whatever LED current is required by the user (maximum of 3 mA.)
Magnetic Characteristics:
Differential
Differential
Typical Operate
Point
20
28
40
80
Minimum
Operate Point
15
21
30
60
Maximum
Operate Point
25
34
50
100
Minimum
1,2
5
5
5
5
Maximum
1,2
14
20
25
35
Note: All Values in Oersteds (Oe); 1 Oe = 1 Gauss in Air
- 42 -
www.nve.com phone: 952-829-9217 fax: 952-829-9189
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