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BTCPower
Technical Specification
S15-48-12D
TM
Broadband TelCom Power, Inc.
Redefining "Current" Limits In Power Conversion
48Vin 12Vout 0.625A
Description
The S15 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, 5, 12 or 15 Volts. All models feature an input filter, input undervoltage lockout, overtemperature protection, output current limiting and short circuit protection. The fully enclosed, encapsulated construction with aluminum heat 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 to achieve very high reliability, high performance and low cost solution to systems designers requiring maximum power in small footprints.
Features
* * * * * * * * * * * * * * * * * * * * Delivers up to 15W in 1" x 1.6" format High power density up to 28.5W/inch3 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, 5V, 12V, +/-12V or 15V models Wide input operating range 36-75V -40C to +100C ambient operation Input undervoltage lockout Output current limit and short circuit protection On/Off pin Output adjustment +/-10% range 1500V, 10M input-to-output isolation Enclosed construction with heat spreader for low temperature rise Enclosed six-sided metal shield construction for low EMI/RFI UL 60950 recognized, TUV EN60950 and CSA C22.2 No. 60950-00 Certified (pending) Meets conducted limits of FCC Class B and CEI IEC61204-3 Class B with external filter MTBF of 850,000 hours @ 50C (MIL-HDBK-217F)
Applications
* * * * * * * Telecommunications Data Communications Wireless Communications Networking Gear Servers, Switches and Data Storage Semiconductor Test Equipment Distributed Power Architecture
Broadband TelCom Power, Inc. - 1719 S. Grand Avenue, Santa Ana, CA 92705 U.S.A.
Tel.: 714-259-4888 * Fax: 714-259-0840 * www.btcpower.com * Email: sales@btcpower.com PS S15-48-12D Rev4.1 21-1-05
Technical Specification
S15-48-12D 48Vin 12Vout 0.625A
BTCPower
TM
CONVERTER SELECTION
Typical @ Ta=+25C under nominal line voltage and full load conditions.
Input Voltage (Volts) Model S15-48-12D Nominal 48 Range 36-75 Current (A) No load 0.025 Full load 0.36 Output Voltage (Volts) 12.0 Current (Amps) 0.625 Efficiency 75% Load (%) 90
Consult factory for other output voltage configurations.
Outline Information and Summary Specifications
Pin Connection (Function) Pin# Single Output Dual Output 1 On/Off On/Off 2 Vin Vin 3 Vin + Vin + 4 Vout + Vout + 5 Trim Common 6 Vout Vout All dimensions are in inches [mm] All pins are dia. 0.040 [1.02] Pin material: Brass Pin finish: Gold plated Insulator pad around pins: Silicone rubber Case: Aluminum material with anodized finish Weight: 25.2g (0.9oz) Tolerance Inches Millimeters *XX 0.020 *X 0.5 *XXX 0.010 *XX 0.25 Pin: 0.002 0.05 Note: Pin 5 is NC.
The information and specifications contained in the specification are believed to be accurate and reliable at the time of publication. Specifications are subject to change without notice.
Broadband TelCom Power, Inc. - 1719 S. Grand Avenue, Santa Ana, CA 92705 U.S.A. P 2 of 6
Tel.: 714-259-4888 * Fax: 714-259-0840 * www.btcpower.com * Email: sales@btcpower.com PS S15-48-12D Rev4.1 21-1-05
Technical Specification
S15-48-12D 48Vin 12Vout 0.625A
BTCPower
TM
Electrical Specifications
Ta=25C, Vin=48V unless otherwise noted.
PARAMETER
Absolute maximum rating Input voltage Operating case temperature Storage temperature Humidity Input characteristics Operating input voltage range Turn on voltage threshold Turn off voltage threshold Transient withstand Maximum input current Off converter input current Output characteristics Output voltage set point Output voltage line regulation Output voltage load regulation Output voltage total regulation Output voltage overall drift rate Output voltage trim range Output voltage ripple and noise Output over power protection Over-voltage protection Over-temperature protection Temperature coefficient Capacitive Load Output dynamic characteristics Startup time Transient recovery time
NOTES
MIN
0 -40 -55
TYP
MAX
80 100 125 95
UNIT
V C C % V V V V A mA V % % % % % mV(pk-pk) %
36
48 35
75 34 100 0.5 31
Transient duration: 100ms 100% load , 36Vin 48Vin 11.7 36~75 Vin 10%-100%Load 2 No trim function 20Mz bandwidth, 100% Load, 48Vin 100 2 N/A 60 120 N/A N/A 12
12.3 2 2 3 3 120 140
0 5% to 95% of the output voltage 25% load change 10
0.04 1,500 20 800 2 89 2000 1100 1100
%/C F ms s %Vo % VDC VDC VDC M pF KHz V V V V % Hrs g(oz)
Transient peak deviation 25% load change Efficiency (see efficiency curve) 100% load efficiency 48 Vin Isolation characteristics Isolation voltage (primary to secondary ) 1minute Isolation voltage (primary to case) 1minute Isolation voltage (secondary to case) 1minute Isolation resistance 500VDC, Primary to secondary Isolation capacitance Primary to secondary Feature Characteristics Switching frequency ON/OFF control (Positive logic) Converter On S15-48-12D Converter Off ON/OFF control (Negative logic) Converter On N/A Converter Off Output voltage trim range N/A Calculated MTBF Bellcore @ 50C Weight
10 1000 225 3 -1 250 275 7 1.2
1,100,000 20.7(0.7)
Broadband TelCom Power, Inc. - 1719 S. Grand Avenue, Santa Ana, CA 92705 U.S.A. P 3 of 6
Tel.: 714-259-4888 * Fax: 714-259-0840 * www.btcpower.com * Email: sales@btcpower.com PS S15-48-12D Rev4.1 21-1-05
Technical Specification
S15-48-12D 48Vin 12Vout 0.625A
BTCPower
TM
Basic Operation And Functions
S15-48-12D is a high efficiency, isolated DC/DC converter. Neither heat sink nor airflow is required when the unit operates at ambient temperature of 25C. The unit has basic control, output adjustment and protection 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.
Fig 1. Recommended ON/OFF circuit configuration
Remote Sense
The unit does NOT have remote sense pins.
Output Common ( Pin 5)
Pin 5 is Vout(+) and Vout(-) common pin.
Trim Pin
S15-48-12D Brick does not have Trim pin.
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. On/Off pin(pin 1) is 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.
Broadband TelCom Power, Inc. - 1719 S. Grand Avenue, Santa Ana, CA 92705 U.S.A. P 4 of 6
Tel.: 714-259-4888 * Fax: 714-259-0840 * www.btcpower.com * Email: sales@btcpower.com PS S15-48-12D Rev4.1 21-1-05
Technical Specification
S15-48-12D 48Vin 12Vout 0.625A
BTCPower
TM
Protection Features
Input under voltage lockout (UVL)
The input voltage must be at least 35V for the unit to turn on. Once the unit has been turned on, it will shut off when the input voltage drops below 34V.
Safety Requirements (SR)
The unit meets UL/CSA/TUV safety requirements per UL60950, TUV EN60950 and CSA C22.2 No.60950-00. Basic insulation is provided between input and output. Caution:
The unit does NOT have a fuse inside. The safety agencies require an external normal-blow fuse to be used at the input side to achieve maximum safety. The recommended fuse rating is 2A/100V.
Output Over-Current Protection (OCP)
The unit is protected against over current or short circuit on the output. When sensing an over current condition, the unit will enter constant current operation and reduce the output voltage. Upon short-circuit condition, the unit will shut down. After over-current or short circuit condition is removed, the unit will resume normal operation automatically.
Output Over Voltage Protection (OVP)
This unit does NOT have OVP function.
Over Temperature Protection (OTP)
This unit does NOT have OTP function.
Application Considerations
Input source Impedance
The unit has been designed to be stable with no external capacitor 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. An external capacitor will improve 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.
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. * For the whole system, for safety agencies requirements, and for the combination of the unit input side (primary side) and the output side (secondary side), verify that under a single fault, hazardous voltages do not appear at the unit 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.
Broadband TelCom Power, Inc. - 1719 S. Grand Avenue, Santa Ana, CA 92705 U.S.A. P 5 of 6
Tel.: 714-259-4888 * Fax: 714-259-0840 * www.btcpower.com * Email: sales@btcpower.com PS S15-48-12D Rev4.1 21-1-05
Technical Specification
S15-48-12D 48Vin 12Vout 0.625A
BTCPower
TM
Electromagnetic Compatibility (EMC)
The unit's conducted emission meets the requirement of EN55022 Class B Specifications, so the external input filter is needed unless a stricter conducted EMI/EMC limitation is required to satisfy or user has its own requirement on the input.
Input Transient Withstand (ITW)
The unit can withstand input transient voltage with 100V/100ms pulse and never be damaged.
Fig 2. Conducted EMC (150KHz-30MHz) test result, the upper trace is the limit of EN55022 Class B specification
Fig 2A. The external filter circuit C0 = 1.0 uF 250Vdc film capacitor C1 = 1.0 uF 100Vdc ceramic capacitor L1 = 2.2 mH Common mode choke
Broadband TelCom Power, Inc. - 1719 S. Grand Avenue, Santa Ana, CA 92705 U.S.A. P 6 of 6
Tel.: 714-259-4888 * Fax: 714-259-0840 * www.btcpower.com * Email: sales@btcpower.com PS S15-48-12D Rev4.1 21-1-05

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