S25-48-3.3 BTCPOWER [Broadband TelCom Power, Inc.], S25-48-3.3 Datasheet

S25-48-3.3

Manufacturer Part Number

S25-48-3.3

Description

48Vin 3.3Vout 7A

Manufacturer

BTCPOWER [Broadband TelCom Power, Inc.]

Datasheet

1.S25-48-3.3.pdf (11 pages)

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Technical Specification

S25-48-3.3, S25-48-3.3N

Description

The S25 family of high efficiency, low power DC/DC

converters offer power levels that exceed other bricks

with similar footprints. They are targeted specifically at

the telecommunication, industrial electronics, mobile

telecommunication and distributed power markets.

With a wide input voltage range of 36-75V they are

available with output voltages of either 1.5, 1.8, 2.5,

3.3 or 5 Volts. All models feature an input filter, input

undervoltage

overtemperature protection, output current limiting and

short

encapsulated

spreader design achieves very efficient heat transfer

with no hot spots. The use of patented design

concepts facilitate maximum power delivered with the

highest efficiency up to 90%. The converters combine

creative design concepts with highly derated power

devices

performance and low cost solution to systems

designers

footprints.

Applications

• Telecommunications

• Data Communications

• Wireless Communications

• Networking Gear

• Servers, Switches and Data Storage

• Semiconductor Test Equipment

• Distributed Power Architecture

Tel.: 714-259-4888 • Fax: 714-259-0840 • www.btcpower.com • Email: sales@btcpower.com

BTCPower

Broadband TelCom Power, Inc. –

circuit

requiring

achieve

lockout,

construction

protection.

maximum

very

output

The

with

high

overvoltage

power

aluminum

fully

reliability,

enclosed,

small

heat

high

1719 S. Grand Avenue, Santa Ana, CA 92705 U.S.A.

and

Broadband TelCom Power,

Features

• Delivers up to 25W in 1.2” x 2.0” format

• High power density up to 30W/inch

• Synchronous rectification topology

• No airflow or heat sink required

• No minumum load required

• Low profile of only 0.35 inch

• High output current in small footprint

• 1.5V, 1.8V, 2.5V, 3.3V or 5V models

• Wide input operating range 36-75V

• -40°C to +100°C ambient operation

• Input undervoltage lockout

• Output overvoltage protection

• Output current limit and short circuit protection

• On/Off pin

• Output adjustment +/-10% range

• 1500V, 10M

• Enclosed construction with heat spreader for

• Enclosed six-sided metal shield construction

• UL 60950 recognized, TUV EN60950 and

• Meets conducted limits of FCC Class B and

• MTBF of 850,000 hours @ 50°C

low temperature rise

for low EMI/RFI

CSA C22.2 No. 60950-00 Certified

CEI IEC61204-3 Class B with external filter

(MIL-HDBK-217F)

Redefining “Current” Limits In Power Conversion

48Vin 3.3Vout 7A

input-to-output isolation

PS S25-48-3.3 Rev 3 16-1-04

Inc.

Related parts for S25-48-3.3

S25-48-3.3 Summary of contents

Page 1

... UL 60950 recognized, TUV EN60950 and CSA C22.2 No. 60950-00 Certified • Meets conducted limits of FCC Class B and CEI IEC61204-3 Class B with external filter • MTBF of 850,000 hours @ 50°C (MIL-HDBK-217F) 1719 S. Grand Avenue, Santa Ana, CA 92705 U.S.A. 48Vin 3.3Vout 7A input-to-output isolation PS S25-48-3.3 Rev 3 16-1-04 Inc. 3 ...

Page 2

... LFM Free Air 200 LFM 7.0 5.8 7.0 1719 S. Grand Avenue, Santa Ana, CA 92705 U.S.A. BTCPower BTCPower Output Voltage Current Full load (Volts) (Amps) 0.585 3.3 7.0 Output Current at 80°C (Amps) 300 LFM Free Air 200 LFM 7.0 3.1 PS S25-48-3.3 Rev 3 16-1- Efficiency 75% Load (%) 88 300 LFM 4.1 5 ...

Page 3

... S25-48-3.3 Rev 3 16-1- UNIT %Vo % VDC VDC VDC M pF KHz ...

Page 4

... There are two ON/OFF control options: positive logic (S25-48-3.3) and negative logic (S25- 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 ...

Page 5

... Trim Resistor The OTP set point is around 100 C. 0.87k -9% 1.34k -8% 2.56k -7% 4.12k -6% 6.10k -5% 9.20k -4% 13.65k -3% 20.95k -2% 36.20k -1% 101.30k 1719 S. Grand Avenue, Santa Ana, CA 92705 U.S.A. BTCPower BTCPower S25-48-3.3 Rev 3 16-1-04 ...

Page 6

... Fig 6. Conducted EMC (150KHz-30MHz) test result, the upper trace is the limit of EN55022 Class B specification Input Transient Withstand (ITW) The unit can withstand input transient voltage with 100V/100ms pulse and never be damaged 1719 S. Grand Avenue, Santa Ana, CA 92705 U.S.A. BTCPower BTCPower T M emission meets the . S25-48-3.3 Rev 3 16-1-04 ...

Page 7

... C with the airflow of 0, 100 and 200LFM (0, 0.5m/s and 1m/s). Others Other curve and waveforms presented include the output voltage vs. current curve (Fig 16) and the input current ripple waveform at full load condition (Fig 17) 1719 S. Grand Avenue, Santa Ana, CA 92705 U.S.A. BTCPower BTCPower S25-48-3.3 Rev 3 16-1-04 ...

Page 8

... For this example, the unit total start up time (t3- t1) is typically 300us. Broadband TelCom Power, Inc. – Tel.: 714-259-4888 • Fax: 714-259-0840 • www.btcpower.com • Email: sales@btcpower.com 48Vin 3.3Vout 7A Fig 8. Start up using On/Off pin 1719 S. Grand Avenue, Santa Ana, CA 92705 U.S.A. BTCPower BTCPower Fig 7. Start up waveform S25-48-3.3 Rev 3 16-1- ...

Page 9

... Fig 12. Efficiency at nominal input (48V) vs. load at different ambient temperatures without air flow, the input voltage is 48V. 1719 S. Grand Avenue, Santa Ana, CA 92705 U.S.A. BTCPower BTCPower T M 36V 48V 75V 2.8 4.2 5.6 7 Output current (A) 25°C 40°C 55°C 2.8 4.2 5.6 7 Output current ( S25-48-3.3 Rev 3 16-1-04 ...

Page 10

... Over Current Protection Curve Fig 16. Output voltage vs current showing current limit point and converter shut down point 1719 S. Grand Avenue, Santa Ana, CA 92705 U.S.A. BTCPower BTCPower 0LFM 100FM 200LFM Ambient Temperature(° S25-48-3.3 Rev 3 16-1- ...

Page 11

... Fig 17. Input current ripple with full output load at 48V input (50mA/div), time scale: 1 s/div Broadband TelCom Power, Inc. – Tel.: 714-259-4888 • Fax: 714-259-0840 • www.btcpower.com • Email: sales@btcpower.com 48Vin 3.3Vout 7A 1719 S. Grand Avenue, Santa Ana, CA 92705 U.S.A. BTCPower BTCPower S25-48-3.3 Rev 3 16-1-04 ...

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