參數(shù)資料
型號: PQ40080QGA09PRS
廠商: SYNQOR INC
元件分類: 電源模塊
英文描述: 1-OUTPUT 72 W DC-DC REG PWR SUPPLY MODULE
封裝: ROHS COMPLIANT PACKAGE-8
文件頁數(shù): 4/14頁
文件大小: 662K
代理商: PQ40080QGA09PRS
Input:
Output:
Current:
PPackage:
ackage:
18-75 V
8.0 V
9 A
Quarter-brick
T
Technical S
echnical Specification
pecification
Product # PQ40080QGA09
Phone 1-888-567-9596
Doc.# 005-2QG380D Rev. A
02/07/06
Page 12
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 cir-
cuit diagram which details the input filtering and voltage trim-
ming.
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 elec-
trolytic input capacitor. The recommended external input capac-
itance is specified in the “Input Characteristics” section. More
detailed information is available in the application note titled
“EMI Characteristics” on the SynQor website.
Vin
External
Input
Filter
Trim
Vin(+)
Iload
Cload
L
C
Vout(+)
Rtrim-up
or
Rtrim-down
Vsense(+)
ON/OFF
Vin(_)
Vin(+)
Vin(_)
Vout(_)
Vsense(_)
Electrolytic
Capacitor
47F
Figure D: Typical application circuit (negative logic unit, permanently enabled).
Figure E: Internal Input Filter Diagram (component values listed on page 3).
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