pq30033ega20 SynQor Worldwide Headquarters, pq30033ega20 Datasheet - Page 12

• Manufacturer Part Number: pq30033ega20
• Description: Eighth-brick Dc/dc Converter
• Manufacturer: SynQor Worldwide Headquarters

Product # PQ30033EGA20
T
T
Over-Temperature Shutdown: A temperature sensor on the
converter senses the average temperature of the module. The
thermal shutdown circuit is designed to turn the converter off
when the temperature at the sensed location reaches the Over-
Temperature Shutdown value. It will allow the converter to turn on
again when the temperature of the sensed location falls by the
amount of the Over-Temperature Shutdown Restart Hysteresis
value.
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.
echnical S
echnical S
V
in
pecification
pecification
Figure E: Internal Input Filter Diagram
Figure D: Typical application circuit (negative logic unit, permanently enabled).
External
Phone [phone]
Input
Filter
V
V
in(+)
in( _ )
Electrolytic
Capacitor
47µF
www.synqor.com
V
ON/OFF
V
L
in(+)
in( _ )
(component values listed on the specifications page)
Application Circuits: Figure D provides a typical circuit dia-
gram which details the input filtering and voltage trimming.
Input Filtering and External Capacitance: Figure E pro-
vides 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.
V
V
Doc.# 005-2EG33MU Rev. A
sense(+)
sense( _ )
V
V
out(+)
out( _ )
Trim
C
P
P
R
R
Current:
Current:
trim-up
ackage:
ackage:
trim-down
Output:
Output:
or
C
3/18/08
load
3.3 V
20 A
Eighth-brick
3.3 V
20 A
Eighth-brick
.
I
load
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