參數(shù)資料
型號: PQ50050HPB50NNS-G
廠商: SYNQOR INC
元件分類: 電源模塊
英文描述: 1-OUTPUT 250 W DC-DC REG PWR SUPPLY MODULE
封裝: ROHS COMPLIANT, HALF BRICK PACKAGE-8
文件頁數(shù): 4/14頁
文件大?。?/td> 1549K
代理商: PQ50050HPB50NNS-G
Product # PQ50050HPB50
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005487 Rev. A
03/18/10
Page 12
Input:
Output:
Current:
Part No.:
APPLICATION CONSIDERATIONS
Input System Instability: This condition can occur because any
DC/DC converter appears incrementally as a negative resistance load.
A detailed application note titled “Input System Instability” is available
on the SynQor website which provides an understanding of why this
instability arises, and shows the preferred solution for correcting it.
Application Circuits: Figure D below provides a typical circuit
diagram which details the input filtering and voltage trimming.
Input Filtering and External Capacitance: Figure E below
provides a diagram showing the internal input filter components.
This filter dramatically reduces input terminal ripple current, which
otherwise could exceed the rating of an external electrolytic
input capacitor. The recommended external input capacitance
is specified in the Input Characteristics section on the Electrical
Specifications page. More detailed information is available in the
application note titled “EMI Characteristics” on the SynQor website.
Vin
VV
External
Input
Filter
Trim
Vin(+)
I
load
C
load
Vout(+)
R
trim-up
R
or
R
trim-down
R
Vsense(+)
ON/OFF
Vin(_)
Vout(_)
Vsense(_)
Electrolytic
Capacitor
Figure D: Typical application circuit (negative logic unit, permanently enabled).
Typical application circuit (negative logic unit, permanently enabled).
Figure E: Internal Input Filter Diagram (component values listed on page 3).
C
2
C
1
L
Vin(+)
Vin(_)
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