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參數(shù)資料
| 型號： | PWS725A |
| 英文描述： | Isolated, Unregulated DC/DC CONVERTERS |
| 中文描述： | 隔離，穩(wěn)壓DC / DC轉(zhuǎn)換器 |
| 文件頁數(shù)： | 6/6頁 |
| 文件大?。?/td> | 68K |
| 代理商： | PWS725A |
6
PWS725A/726A
full load while drawing only 3mA from the negative supply.
Under these conditions, the PWS725A/726A could supply
power for up to five devices (80mA
÷
16mA
≈
5). Thus, the
PWS725A/726A can power more circuits than is at first
apparent.
ISOLATION VOLTAGE RATINGS
Because a long-term test is impractical in a manufacturing
situation, the generally accepted practice is to perform a
production test at a higher voltage for some shorter period of
time. The relationship between actual test conditions and the
continuous derated maximum specification is an important
one. Burr-Brown has chosen a deliberately conservative
one: VDC
= (2
X
VACrms
) + 1000V for
ten seconds. This choice is appropriate for conditions where
system transient voltages are not well defined.
(1)
Where the
real voltages are well-defined or where the isolation voltage
is not continuous, the user may choose a less conservative
derating to establish a specification from the test voltage.
OUTPUT SYNC SIGNAL
To allow synchronization of an ISO120 or ISO121 isolation
amplifier, the PWS725A and PWS726A have an OUTPUT
SYNC signal at pin 29. It should be connected as shown in
Figure 5 to keep capacitive loading of pin 29 to a minimum.
If output sync is not used, leave pin open.
FIGURE 5. Synchronization with ISO120 or ISO121 Isola-
tion Amplifier.
29
PWS725A/726A
20k
4
20pF
Ext Osc
Connection
of
ISO120
or
ISO121
NOTE: (1) Reference National Electrical Manufacturers Association (NEMA)
Standards Parts ICS I-109 and ICS I-111.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PWS725A/PWS726A | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:PWS725A. PWS726A - DISCONTINUED PRODUCT. No longer recommended for new design. |
| PWS726A | 制造商:BB 制造商全稱:BB 功能描述:Isolated, Unregulated DC/DC CONVERTERS |
| PWS727 | 制造商:BB 制造商全稱:BB 功能描述:DC-DC變換器,Isolated, Unregulated DC/DC CONVERTERS |
| PWS727/PWS728 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:PWS727. PWS728 - DISCONTINUED PRODUCT. No longer recommended for new design. |
| PWS728 | 制造商:BB 制造商全稱:BB 功能描述:DC-DC變換器,Isolated, Unregulated DC/DC CONVERTERS |
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