Technical Specification
Quarter
24V 15V
6.7A
out
in
Brick
verter to turn on again when the temperature of the sensed
location falls below 115°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 E below provides a typical
circuit diagram which is useful when using input filtering
and voltage trimming.
Input Filtering
Vin(+)
Vout(+)
Vsense(+)
Electrolytic
Capacitor
3.3µH
100µF
Rtrim-up
or
ESR 0.33
Ω
Trim
ON/OFF
Rtrim-down
Cload
Iload
_
18V < Vin < 36V
Vsense( )
_
_
Vin( )
Vout( )
Figure E: Typical application circuit (negative logic unit, permanently enabled).
Product # PQ24150QGA07
Phone 1-888-567-9596
Doc.# 005-2QG215D_A
3/1/02
Page 11
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