Technical Specification
SQ100-48-1.5,
SQ100-48-1.5N
SQO100-48-1.5, SQO100-48-1.5N
48Vin 1.5Vout 25A
BTCPower
TM
Data Sheet
Application and consideration
Input Source Impedance
The unit has been designed to be stable with no
external capacitors when used in a low
inductance input and output circuit.
However in many applications, the inductance
with the distribution from the power source to the
input of the unit can affect the stability of the unit.
The addition of 47uF electrolytic capacitor with an
Esr < 1Ω (at 100khz) across the input can
ensure the stability of the unit. Also in many
applications, the user has to use decoupling
capacitors at the output load, to ensure the hold
up time for the load.
Safety Requirements and Considerations
The unit meets the American and International
safety regulatory requirement UL60950, TUV EN
60950, CSA C22.2 No. 60950-00. Basic
insulation is also provided between the input side
and the output side.
To meet safety agencies requirements, an input
line fuse must be used external to the unit. An 8A
fuse or less with a normal blow rate must be used
to meet the safety agencies requirements
If the input source is non-SELV ( ELV or a
hazardous voltage greater than 60 Vdc and less
than or equal to 75 Vdc), for the unit output to be
considered meeting the requirements of safety
extra low voltage (SELV), all of the following must
be met:
•
•
The input source is to be provided with
reinforced insulation from any hazardous
voltage, including the ac main.
The input pins of the unit are not operator
accessible.
Fig 7. External filter circuit for EMC.
•
•
For whole system, for safety agencies
requirements, and for the combination of
the unit’s input side (primary side) and the
unit’s output side (secondary side), verify
that under a single fault, hazardous
voltages do not appear at the unit’s output
side (secondary side).
Never ground either of the input pins of
the unit without grounding one of the
output pins. This may allow a non-SELV
voltage to appear between the output pin
and ground.
Electromagnetic Compatibility ( EMC )
EMC requirements must be met at the end
product and system level from the customer. As
there is no specific standards dedicated to the
EMC of board-mounted DC/DC converter, which
exist. However the SQ(SQO) Family unit has
been tested for EMC requirement levels.
With the addition of a simple external filter (see
Fig 7.), the SQ(SQO) Family unit passes the FCC
class B test conducted and CEI IEC61204-3
Class B.
Broadband TelCom Power, Inc.
1719 S. Grand Avenue, Santa Ana, CA 92705 U.S.A.
P
8 of 16
Tel.: 714-259-4888 • Fax: 714-259-0840 • www.btcpower.com • Email: sales@btcpower.com • PS SQ100-48-1.5, SQO100-48-1.5 Rev1 4-2-03
BTCPOWER [ BROADBAND TELCOM POWER, INC. ]
