LP2951C 查看數據表（PDF） - ON Semiconductor
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LP2951C Datasheet PDF : 16 Pages
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LP2950
Figure 24. Open Circuit Detector for 4.0 to 20 mA Current Loop
+ 5.0 V
4
1N4001
20 mA
4.7 k
1
5
Output*
8
NC
5 Error
Vin
Vout
1
2
4
SNS 2 NC
LP2951CN
* High for
NC 3 SD
VO T 6 NC IL < 3.5 mA
0.1 µF
Gnd FB
4
7
1N457
1N457
360
1N457
Figure 25. Low Battery Disconnect
100 k
2
MC34164P–5 1
3
31.6 k
2N3906
6.0 V Lead–Acid
Battery
8
NC
5 Error
Vin
Vout
1
SNS 2
LP2951CN
3 SD
VO T 6 NC
Gnd FB
4
7
NC
1.0 µF
Main V+
Memory V+
20
NiCad Backup
Battery
Figure 26. DPAK Thermal Resistance and Maximum
Power Dissipation versus P.C.B. Copper Length
100
2.4
Free Air
PD(max) for TA = 50°C
90
Mounted
2.0
Vertically
80
Minimum
70
Size Pad
60
2.0 oz. Copper
L
1.6
ÎÎÎ L
1.2
ÎÎÎÎÎÎ 0.8
50
0.4
RθJA
40
0
0
5.0
10
15
20
25
30
L, LENGTH OF COPPER (mm)
http://onsemi.com
12
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