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參數(shù)資料
| 型號： | TMP01GBC |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 溫度/濕度傳感器 |
| 英文描述： | CONNECTOR ACCESSORY |
| 中文描述： | ANALOG TEMP SENSOR-VOLTAGE, 2.49-2.5V, 1.50Cel, RECTANGULAR, SURFACE MOUNT |
| 封裝： | 0.078 X 0.071 INCH, DIE-8 |
| 文件頁數(shù)： | 11/16頁 |
| 文件大?。?/td> | 377K |
| 代理商： | TMP01GBC |
TMP01
REV. C
–11–
T he last class of high power devices discussed here are T hyris-
tors, which includes SCRs and T riacs. T riacs are a useful alter-
native to relays for switching ac line voltages. T he 2N6073A
shown in Figure 15e is rated to handle 4A (rms). T he
optoisolated MOC3011. T riac shown features excellent electri-
cal isolation from the noisy ac line and complete control over
the high power T riac with only a few additional components.
NC = NO CONNECT
NC
NC
V+ = 5V
R1
R2
R3
300
150
TEMPERATURE
SENSOR &
VOLTAGE
REFERENCE
1
2
3
4
HYSTERESIS
GENERATOR
WINDOW
COMPARATOR
TMP01
VPTAT
VREF
7
8
5
6
MOC3011
1
2
3
4
5
6
LOAD
AC
2N6073A
Figure 15e. Controlling the 2N6073A Triac
High Current Switching
As mentioned above, internal dissipation due to large loads on
the T MP01 outputs will cause some temperature error due to
self-heating. External transistors remove the load from the
T MP01, so that virtually no power is dissipated in the internal
transistors and no self-heating occurs. Figure 16 shows a few ex-
amples using external transistors. T he simplest case, using a
single transistor on the output to invert the output signal is
shown in Figure 16a. When the open-collector of the T MP01
turns “ON” and pulls the output down, the external transistor
Q1’s base will be pulled low, turning off the transistor. Another
transistor can be added to reinvert the signal as shown in Figure
16b. Now, when the output of the T MP01 is pulled down, the
first transistor, Q1, turns off and its collector goes high, which
turns Q2 on, pulling its collector low. T hus, the output taken
from the collector of Q2 is identical to the output of the
T MP01. By picking a transistor that can accommodate large
amounts of current, many high power devices can be switched.
2N1711
V+
R1
R2
R3
4.7k
TEMPERATURE
SENSOR &
VOLTAGE
REFERENCE
1
2
3
4
HYSTERESIS
GENERATOR
WINDOW
COMPARATOR
TMP01
VPTAT
VREF
7
8
5
6
I
C
Q1
Figure 16a. An External Resistor Minimizes Self-Heating
Q1
Q2
2N1711
V+
R1
R2
R3
4.7k
TEMPERATURE
SENSOR &
VOLTAGE
REFERENCE
1
2
3
4
HYSTERESIS
GENERATOR
WINDOW
COMPARATOR
TMP01
VPTAT
VREF
7
8
5
6
I
C
4.7k
2N1711
Figure 16b. Second Transistor Maintains Polarity of
TMP01 Output
An example of a higher power transistor is a standard Darling-
ton configuration as shown in Figure 16c. T he part chosen,
T IP-110, can handle 2A continuous which is more than enough
to control many high power relays. In fact the Darlington itself
can be used as the switch, similar to MOSFET s and IGBT s.
MOTOR
SWITCH
RELAY
+12V
2N1711
V+
R1
R2
R3
4.7k
TEMPERATURE
SENSOR &
VOLTAGE
REFERENCE
1
2
3
4
HYSTERESIS
GENERATOR
WINDOW
COMPARATOR
TMP01
VPTAT
VREF
7
8
5
6
I
C
4.7k
TIP-110
Figure 16c. Darlington Transistor Can Handle Large Currents
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