HPQ-3.3 Datasheet, PDF (10/10 Pages) Murata Manufacturing Co., Ltd. – Isolated High Power Quarter Brick DC/DC Converters

HPQ-3.3/50-D48 Series
Isolated High Power Quarter Brick DC/DC Converters
On/Off Enable Control Ground Bounce Protection
To improve reliability, if you use a small signal transistor or other external
circuit to select the Remote On/Off control, make sure to return the LO side
directly to the –Vin power input on the DC/DC converter. To avoid ground
bounce errors, do not connect the On/Off return to a distant ground plane or
current-carrying bus. If necessary, run a separate small return wire directly to
the –Vin terminal. There is very little current (typically 1-5 mA) on the On/Off
control however, large current changes on a return ground plane or ground bus
can accidentally trigger the converter on or off. If possible, mount the On/Off
transistor or other control circuit adjacent to the converter.
NOTICE—Please use only this customer data sheet as product documentation
when laying out your printed circuit boards and applying this product into your
application. Do NOT use other materials as official documentation such as adver-
tisements, product announcements, or website graphics.
We strive to have all technical data in this customer data sheet highly accurate
and complete. This customer data sheet is revision-controlled and dated. The
latest customer data sheet revision is normally on our website (www.murata-
ps.com) for products which are fully released to Manufacturing. Please be
especially careful using any data sheets labeled “Preliminary” since data may
change without notice.
The pinout (Pxx) and case (Cxx) designations (typically P65 or C59) refer to
a generic family of closely related information. It may not be a single pinout
or unique case outline. Please be aware of small details (such as Sense pins,
Power Good pins, etc.) or slightly different dimensions (baseplates, heat
sinks, etc.) which may affect your application and PC board layouts. Study the
Mechanical Outline drawings, Input/Output Connection table and all footnotes
very carefully. Please contact Murata Power Solutions if you have any ques-
tions.
On/Off
Control
Transistor
Preferred location
of On/Off control
adjacent to -Vin
terminal
DC/DC Converter
+ Vin
On/Off Enable
-Vin return
Do not connect
control transistor
through remote
power bus
Ground plane or power return bus
Install separate
return wire for
On/Off control
with remote
transistor
Figure 7. On/Off Enable Control Ground Bounce Protection
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A.
ISO 9001 and 14001 REGISTERED
Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other
technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply
the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without
notice.
© 2011 Murata Power Solutions, Inc.
www.murata-ps.com/locations
email: [e-mail]
21 Feb 2011 MDC_HPQ-3.3/50-D48 Series.A13 Page 10 of 10