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參數(shù)資料
| 型號： | 724 |
| 英文描述： | Low-Dropout, 300mA Linear Regulators in SOT23 |
| 中文描述： | 724 -已停產(chǎn)產(chǎn)品。不再推薦用于新設(shè)計。 |
| 文件頁數(shù)： | 5/5頁 |
| 文件大?。?/td> | 83K |
| 代理商： | 724 |
724
5
FIGURE 2. Two-Port Isolation with Four 3650s.
Figure 2 illustrates how the 724 may provide isolated input
power to the input stage of four 3650s connected in the two-
port configuration. Power for the four output stages is
provided by the system +15VDC and –15VDC supplies.
Input stages are isolated from each other and from the
system supply. In this situation, the 724’s isolation specifi-
cation applies to amplifier’s input-to-output voltage and to
the voltage existing between any two I/P COM terminals.
ISOLATION VOLTAGE RATINGS
Since a “continuous” test is impractical in a product manu-
facturing situation (implies infinite test duration), it is gen-
erally accepted practice to perform a production test at a
higher voltage (i.e., higher than the continuous rating) for
some shorter length of time.
The important consideration is then “what is the relationship
between actual test conditions and the continuous derated
maximum specification” There are several rules of thumb
used throughout the industry to establish this relationship.
Burr-Brown has chosen a very conservative one: V
=
(2
x
V
) + 1000V. This relationship is appro-
priate for conditions where the system transient voltages are
not well defined.
(3)
Where the real voltages are well defined
or where the isolation voltage is not continuous the user may
choose to use a less conservative derating to establish a
specification from the test voltage.
SHORT CIRCUIT PROTECTION
The circuit in Figure 3 may be added to the input of the 724
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
β
of 2N2219 of 50).
NOTES: (1) “Output” denotes a single output terminal (+V or –V) and its
associated common. (2) “Channel” denotes a pair of outputs (+V and –V) and
their associated common. (3) Reference National Electrical Manufacturers
Association (NEMA) Standards Parts ICS 1-109 and ICS 1-111.
FIGURE 3. Short Circuit Protection.
P+
724
2N2219
IN4140
–
V
IN
+
100
1
V+
V–
E
R
1
0.47μF
3.6k
2
3
3
–V
O3
C
3
+V
O3
+V
O2
C
2
–V
O2
P+
V+
E
V–
V
IN
1.3k
0.47μF
+15VDC
COM
724
3
3
3
O/P COM
–15VDC
+
O
–
O
C
4
+
O
–
O
C
1
4
1
+15VDC
O/P COM
–15VDC
+15VDC
O/P COM
–15VDC
+15VDC
O/P COM
–15VDC
+15VDC
O/P COM
–15VDC
1 2 3 4 Denote four separate input commons.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 72-4 | 功能描述:電池座、電池扣和電池接頭 T-9V-SNAP-4" RoHS:否 制造商:Eagle Plastic Devices 產(chǎn)品:Battery Snaps 電池組電池大小:9 V 電池數(shù)量:1 端接類型:Snaps 顏色:Black 材料:Polyvinyl Chloride (PVC) 安裝風(fēng)格:Snap-In |
| 7-2-4 SCREENED | 制造商:Farnell / Pro-Power 功能描述:CABLE DEF 7-2-4C 4CORE 500M 制造商:pro-power 功能描述:CABLE, DEF 7-2-4C, 4CORE, 500M |
| 7-2-4 SCREENED | 制造商:Farnell / Pro-Power 功能描述:CABLE DEF 7-2-4C 4 CORE 500M |
| 724 | 制造商:3M Electronic Products Division 功能描述:Static protection 制造商:CML Innovative Technologies 功能描述:LAMP MID.FLANGE T1.3/4 6V 1.2W |
| 724 | 制造商:SLI EBT 功能描述:LAMP T1.3/4 MID.FLANGE 6V 1.2W |
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