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| 型號： | 0722MG |
| 英文描述： | DUAL ISOLATED DC/DC CONVERTER |
| 中文描述： | 雙隔離式DC / DC變換器 |
| 文件頁數(shù)： | 8/10頁 |
| 文件大?。?/td> | 157K |
| 代理商： | 0722MG |
722
7
SBVS016A
www.ti.com
FIGURE 3. Short-Circuit Protection.
FIGURE 2. Two-Port Isolation with Two 3650s.
+V
O1
C
1
P+
V+
E
V–
R
1
2N2219
V
IN
IN4148
100
+
3.6k
1
–V
O1
+V
O2
C
2
–V
O2
–
722
+V
O1
C
1
–V
O1
+V
O2
C
2
–V
O2
P+
V+
E
V–
C
R
1
V
IN
Com
+15V
O/P Com
3650
+15V –15V
O/P Com
+15V –15V
I/P
Com #2
I/P
Com #1
722
–15V
Figure 2 illustrates how the 722 can provide isolated input
power to the input stage of two 3650s connected in the two-
port configuration. Power for the output stage is provided by
the system +15V and –15V supplies. Input stages are iso-
lated from each other and from the system supply. In this
situation, the 722 input-to-output isolation specification ap-
plies to the amplifier input-to-output voltages, whereas the
channel-to-channel 722 specification applies to the voltage
existing between I/P Com #1 and I/P Com #2.
SHORT CIRCUIT PROTECTION
The circuit in Figure 3 may be added to the input of the 722
to protect it from damage in situations where too much
current is demanded from the outputs—such as a short
circuit from an output to its common. The circuit limits input
current to approximately 150mA for an input voltage of
15VDC (for of 2N2219 of 50).
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