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參數(shù)資料
| 型號(hào)： | 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(zhuǎn)換器 |
| 文件頁數(shù)： | 1/8頁 |
| 文件大小： | 117K |
| 代理商： | PWS740 |
PWS740
Distributed Multi-Channel Isolated
DC-TO-DC CONVERTER
FEATURES
G
ISOLATED
±
7 TO
±
20VDC OUTPUTS
G
BARRIER 100% TESTED AT 1500VAC, 60Hz
G
LOWEST POSSIBLE COST PER CHANNEL
G
MINIMUM PC BOARD SPACE
G
80% EFFICIENCY (8 CHANNELS, RATED
LOADS)
G
FLEXIBLE USE WITH PWS745
COMPONENTS
APPLICATIONS
G
INDUSTRIAL MEASUREMENT AND
CONTROL
G
DATA ACQUISITION SYSTEMS
G
TEST EQUIPMENT
DESCRIPTION
The PWS740 is a multichannel, isolated DC-to-DC
converter with a 1500VAC continuous isolation rat-
ing. The outputs track the input voltage to the con-
verter over the range of 7 to 20VDC. The converter’s
modular design, comprising three components, mini-
mizes the cost of isolated multichannel power for the
user.
The PWS740-1 is a high-frequency (400kHz nominal)
oscillator/driver, handling up to eight channels. This
part is a hybrid containing an oscillator and two power
FETs. It is supplied in a TO-3 case to provide the
power dissipation necessary at full load. Transformer
impedance limits the maximum input current to about
700mA at 15V input, well within the unit’s thermal
limits. A TTL-compatible ENABLE pin provides out-
put shut-down if desired. A SYNC pin allows syn-
chronization of several PWS740-1s.
The PWS740-2 is a trifilar-wound isolation trans-
former using a ferrite core and is encapsulated in a
plastic package, allowing a higher isolation voltage
rating. One PWS740-2 is used per isolated channel.
1987 Burr-Brown Corporation
PDS-758H
Printed in U.S.A. January, 1998
International Airport Industrial Park Mailing Address: PO Box 11400, Tucson, AZ 85734 Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 Tel: (520) 746-1111 Twx: 910-952-1111
Internet: http://www.burr-brown.com/ FAXLine: (800) 548-6133 (US/Canada Only) Cable: BBRCORP Telex: 066-6491 FAX: (520) 889-1510 Immediate Product Info: (800) 548-6132
Up to
6 More
Channels
Freq
Adj
20μH
Oscillator/
Driver
1
2
6
5
4
0.3μF
* Optional features; if unused, leave open.
** User Option
0.3μF
V
DRIVE
*7
*2
*1
PWS740-1
3
8
5
6
4
10μF
V+
PWS740-2
T
O
O
T
2
6
5
4
3
1
3
0.3μF
BAV99
Functional Diagram
BAV99
0.3μF
10μH
10μH
+V
O
Gnd1
–V
O
0.3μF
BAV99
BAV99
0.3μF
10μH
10μH
+V
O
Gnd1
–V
O
PWS740
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|---|---|
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| PWS745A/PWS726A/PWS740 WAF | 制造商:Texas Instruments 功能描述: |
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