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
Basic operation and functions
The
SQ(SQO) family
uses FTT technology to
achieve high output current. The whole unit
switches at the fixed frequency for a predictable
EMI performance. Rectification of the
transformer's output is done by synchronous
rectifiers to make the unit work in a higher
efficiency power performance.
The
SQ(SQO) Brick
has many standard controls
and protection functions
.
Input ( pin1, pin3 )
Input power Vin(+) must be connected to Positive
input voltage pin1; Input power Vin(-) must be
connected to Negative input voltage pin3.
Output ( pin8, pin4 )
Output power Vout(+) must be connected to
Positive output voltage pin8; Output power Vout(-
) must be connected to Negative output voltage
pin4.
On/Off ( pin 2 )
Permits the user to maintain unit On/Off, in order
to properly sequence different power supplies
and reduce power consumption during the
standby condition. There are two remote control
options available, positive logic and negative logic
is referenced to Vin (-), and typical connections
are shown in Fig 1.
Pin 2 is the "Enable" pin, connecting a TTL
compatible pin. A TTL control signal to this pin,
according to the specification, will turn the unit on
or off.
The positive logic version turns on when pin 2 is
at logic high, and turns off when pin 2 is at logic
low. The unit is on when pin 2 is left open.
The negative logic version turns on when pin 2 is
at logic low and turns off when pin 2 is at logic
high. The pin 2 can be directed to Vin(-), to
enable automatic turn on to the unit without the
need of an external control signal.
Turn on timing vs. Input On/Off Pin is shown in
Figure 12, and the Turn off timing vs. Input On/Off
pin is shown in Figure 13.
Remote Sense ( pin 5, pin 7 )
Permits the user to maintain the accurate output
voltage at the remote load terminals regardless of
the line drop.
The Sense(-) (pin5) and Sense (+) (pin7) should
be connected at the load or at the point where the
regulation is needed. ( shown on Fig. 2)
Fig 2: Remote Sense Circuit
The remote sense feature of the unit
compensates for voltage drop occurring between
the output pins of the unit and load. The Sense(-)
(pin5) and Sense(+)(pin7) should be connected at
the load or at the point where regulation is
required.
Fig. 1: Typical Circuit for On/Off Function
Broadband TelCom Power, Inc.
1719 S. Grand Avenue, Santa Ana, CA 92705 U.S.A.
P
4 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. ]
