S15-48-3.3 BTCPOWER [Broadband TelCom Power, Inc.], S15-48-3.3 Datasheet - Page 4

• Manufacturer Part Number: S15-48-3.3
• Description: 48Vin 3.3Vout 4.5A
• Manufacturer: BTCPOWER [Broadband TelCom Power, Inc.]

Technical Specification
S15-48-3.3
Basic Operation And Functions
S15-48-3.3/S15-48-3.3N is a high efficiency,
isolated DC/DC converter. Neither heat sink nor
airflow is required when the unit operates at
ambient temperature of 25 C. The unit has basic
control,
functions.
Input (Pin 2, Pin 3)
Input power Vin(+) must be connected to Positive
input pin 3; Input power Vin(-) must be connected
to Negative input pin2.
Output (Pin 4, Pin 6)
Output power Vout(+) must be connected to
Positive output pin 4; Output power Vout(-) must
be connected to Negative output pin6.
ON/OFF (Pin 1)
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 ON/OFF control
options: positive logic (S15-48-3.3) and negative
logic (S15-48-3.3N). Both are referenced to Vin-.
Pin 1 is the "Enable" pin, connecting a TTL
compatible pin. A TTL control signal to this pin,
according to the specification, turns the unit on or
off.
The positive logic unit turns on when the pin is at
logic high or open, and turns off at logic low.
The negative logic unit turns on when the pin is at
logic low, and turns off at logic high state.
Typical ON/OFF connection is shown in Fig 1.
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Broadband TelCom Power, Inc. –
Fig 1. Recommended ON/OFF circuit configuration
output
adjustment
and
protection
1719 S. Grand Avenue, Santa Ana, CA 92705 U.S.A.
48Vin 3.3Vout 4.5A
Remote Sense
The unit does NOT have remote sense pins.
Output Trim (Pin 5)
Permits the user to adjust the output voltage up
or down to achieve the custom voltage or to
make the output voltage margining.
The unit’s output voltage can be adjusted up 10%
or down 10% relative to the rated output voltage
by adding an external resistor between pin 5 and
one of the output pins (pin 4 and 6).
To increase the output voltage, a trim resistor
should be connected between pin 5(Trim) and pin
6 (Vout-), as shown in Fig 2.
To decrease the output voltage, a trim resistor
should be connected between pin 5 (Trim) and
pin 4 (Vout+), as shown in Fig 3.
The recommended trim resistor values can be
found in the trim table (Table 1) and charts (Fig 4
and 5).
Fig 2. Configuration for increasing the output voltage
Fig 3. Configuration for decreasing the output voltage
PS S15-48-3.3 Rev4 1-30-05
BTCPower
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