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參數(shù)資料
| 型號(hào)： | PQ48025QNA25PYS |
| 廠商： | SYNQOR INC |
| 元件分類： | 電源模塊 |
| 英文描述： | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| 文件頁(yè)數(shù)： | 3/13頁(yè) |
| 文件大小： | 722K |
| 代理商： | PQ48025QNA25PYS |
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the sensed location reaches 115°C. It will allow the con-
verter to turn on again when the temperature of the sensed
location falls below 110°C.
APPLICATION CONSIDERATIONS
Input System Instability: This condition can occur
because a dc/dc converter appears incrementally as a
negative resistance load. A detailed application note titled
“Input System Instability” is available on the SynQor web
site (www.synqor.com) which provides an understanding
of why this instability arises, and shows the preferred solu-
tion for correcting it.
Application Circuits:
Figure D below provides a typical
circuit diagram which is useful when using input filtering
and voltage trimming.
Figure E is a detailed look of the inter-
nal ON/OFF circuitry that is shown in
Figure A.
Product # PQ48025QNA25
Phone 1-888-567-9596
Doc.# 005-2QN425D_B
9/5/01
Page 11
Technical Specification
48Vin 2.5Vout 25A
Quarter
Brick
Figure E: Internal ON/OFF pin circuitry
TTL
5V
50k
274k
Vin(
+)
ON/OFF
Vin(_)
35V < Vin < 75V
Input Filtering
Trim
Vin(
+)
Iload
Cload
Vout(
+)
Rtrim-up
or
Rtrim-down
Vsense(
+)
ON/OFF
Vin(_)
Vout(_)
Vsense(_)
Electrolytic
Capacitor
33F
ESR
1
Figure D: Typical application circuit (negative logic unit, permanently enabled).
50k
100pF
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