- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄370028 > PWS740 Distributed Multi-Channel Isolated DC-TO-DC CONVERTER PDF資料下載
參數(shù)資料
| 型號： | PWS740 |
| 英文描述： | Distributed Multi-Channel Isolated DC-TO-DC CONVERTER |
| 中文描述： | 分布式多通道隔離型DC - DC轉換器 |
| 文件頁數(shù)： | 8/8頁 |
| 文件大?。?/td> | 117K |
| 代理商： | PWS740 |
8
PWS740
digital ground and the PWS740 ground together locally,
leaving the ISO102 analog ground to be connected off of the
board; the differential voltage between analog and digital
ground may become too great.
OUTPUT CURRENT RATINGS
The PWS740-1 driver contains “soft-start” driver circuitry
to protect the driver FETs and eliminate high inrush currents
during turn-on. Because the PWS740 can have between one
and eight channels connected, it was not possible to provide
a suitable internal current limit within the driver. Instead,
impedance-limiting protects the driver and transformer from
overload. This means that the internal impedance of each
PWS740-2 transformer is high enough that, when short-
circuited at its output, it limits the current drawn from the
driver to a safe value. In addition, the wire size and mass of
the transformer are large enough that the transformer does
not receive damage under continuous short-circuit condi-
tions.
The PWS740-1 is capable of driving up to eight individual
channels to their full current rating. The total current which
can be drawn from each isolation channel is a function of
total power being drawn from both DC V+ and V– outputs.
For example, if one output is not used, then maximum
current can be drawn from the other output. In all cases, the
maximum total current that can be drawn from any indi-
vidual channel is:
| I
L
+ | + | I
L
– |
≤
60mA
It should be noted that many analog circuit functions do not
simultaneously draw full rated current from both the positive
and negative supplies. Thus, the PWS740 can power more
circuits per channel than is first apparent. For example, an
operational amplifier does not draw maximum current from
both supplies simultaneously. If a circuit draws 10mA from
the positive supply and 3mA from the negative supply, the
PWS740 could power (60
÷
13), about four devices per
channel.
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: V
TEST
= (2
x
V
CONTINUOUS RATING
) + 1000V. This
choice is appropriate for conditions where system transient
voltages are not well defined.
(3)
Where the real voltages are
well-defined or where the isolation voltage is not continu-
ous, the user may choose a less conservative derating to
establish a specification from the test voltage.
(3) Reference National Electrical Manufacturers Association (NEMA) Standards part
ICS I-109 and ICS1-111.
相關PDF資料 |
PDF描述 |
|---|---|
| PXA210 | Intel-R PXA250 and PXA210 Applications Processors |
| PXA250 | Intel-R PXA250 and PXA210 Applications Processors |
| PXA255 | PXA255 Processor |
| PXA270 | Electrical, Mechanical, and Thermal Specification |
| PXAC37 | XA 16-bit microcontroller family 32K/1024 OTP CAN transport layer controller 1 UART, 1 SPI Port, CAN 2.0B, 32 CAN ID Filters, transport layer co-proce |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| PWS-741P-1R | 制造商:Supermicro Computer Inc 功能描述:POWER SUPPLY AC 740W - Bulk |
| PWS745 | 制造商:BB 制造商全稱:BB 功能描述:Multi-Channel Isolated DC/DC CONVERTER COMPONENTS |
| PWS745A/PWS726A/PWS740 WAF | 制造商:Texas Instruments 功能描述: |
| PWS745A/PWS726A/PWS741 WAF | 制造商:Texas Instruments 功能描述: |
| PWS745A/PWS726A/PWS742 WAF | 制造商:Texas Instruments 功能描述: |
發(fā)布緊急采購，3分鐘左右您將得到回復。