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參數(shù)資料
| 型號： | AS2316N |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Secondary Side Housekeeping Circuit |
| 中文描述： | 二次側(cè)管家電路 |
| 文件頁數(shù)： | 10/10頁 |
| 文件大?。?/td> | 60K |
| 代理商： | AS2316N |
AS23xx
Secondary Side Housekeeping Circuit
ASTEC Semiconductor
100
3.1 Delaying Remote OFF: DELAY
In systems which use the OFF and FAULT pins
to provide remote on/off switching, the delay
between the OFF pin going high and the FAULT
signal going high is programmable with a capaci-
tor to ground on the DELAY pin as described in
2.5 above. The POK pin, on the other hand will
go high immediately after the OFF pin is open
circuited or pulled high, giving the system warn-
ing of the impending shutdown. The DELAY pin
provides a 1
μ
A current source to charge the
cap, and when the cap charges above 2.5 V, the
FAULT pin will go high.
3.2 AC Warning Prior to Primary Drop-out
In systems where the input line voltage is
switched, the AC pin threshold should be set so
that it causes POK to go low before the primary
bulk voltage reaches drop-out and the primary
PWM shuts off. The output of the AC comparator
also causes the UVB pin to pull low, so that the
undervoltage sensing does not trip the FAULT
latch as the outputs fall below spec. Recall that
the AC pin senses a divided down and filtered
representation of the secondary side switching
waveform, which will provide a proportional rep-
resentation of the primary voltage via the turns
ratio of the transformer.
ASTEC reserves the right to make changes without further notice to any products described herein to improve reliability, function, or
design. ASTEC does not assume any liability arising out of the application or use of any product or circuit described herein; neither does
it convey any license under its patent rights or the rights of others. ASTEC products are not authorized for use as components in life
support devices or systems intended for surgical implant into the body or intended to support or sustain life. Buyer agrees to notify
ASTEC of any such intended end use whereupon ASTEC will determine availability and suitability of its products for the intended use.
ASTEC and the ASTEC logo are trademarks of ASTEC (BSR) PLC.
ASTEC SEMICONDUCTOR
255 Sinclair Frontage Road
Milpitas, California 95035
Tel. (408) 263-8300
FAX (408) 263-8340
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| AS2333 | Secondary Side Housekeeping Circuit |
| AS2333D | Secondary Side Housekeeping Circuit |
| AS2333N | Secondary Side Housekeeping Circuit |
| AS2350 | Secondary Side Housekeeping Circuit |
| AS2350D | Secondary Side Housekeeping Circuit |
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