MCOTS-C-28-1R8-HP SynQor Worldwide Headquarters, MCOTS-C-28-1R8-HP Datasheet - Page 10

• Manufacturer Part Number: MCOTS-C-28-1R8-HP
• Description: Military Cots Dc/dc Converter
• Manufacturer: SynQor Worldwide Headquarters

Product # MCOTS-C-28-1R8-HP
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 CONSIDERATIONS
Input Filtering and External Capacitance: Figure E provides
a diagram showing the internal input filter components. This filter
dramatically reduces input terminal ripple current, which otherwise
could exceed the rating of the converter's external electrolytic
input capacitor. The recommended external input capacitance
Technical Specification
V
in
Figure D: Typical application circuit (negative logic unit, permanently enabled).
External
Input
Filter
Phone [phone]
V
V
in(+)
in(
_
)
Electrolytic
Capacitor
Internal
Input
Filter
Figure E: Internal Input Filter Diagram
L
www.synqor.com
V
ON/OFF
V
C
in(+)
in(
_
)
Application Circuits: Figure D provides a typical circuit diagram
which details the input filtering and voltage trimming.
is specified in the Input Characteristics section on the Electrical
Characteristics page. More detailed information is available in
the application note titled “EMI Characteristics” on the SynQor
website.
V
Converter
V
sense(+)
V
sense(
V
out(+)
out(
Trim
Doc.# 005-0005367 Rev. A
_
_
)
)
R
R
V
V
trim-up
MCOTS-C-28-1R8-HP
trim-down
out(+)
out(-)
or
Current:
Output:
C
load
10/20/09
1.8V
60A
I
load
Page 10