Datasheet S48SS3R304NRFA, S48SS1R805NRFA, S48SS05002NRFA, S48SS05003NRFA, S48SS12001NRFA Datasheet (Delta Electronics)

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Page 1

FEATURES

 High efficiency: 86.5% @ 12V/1.25A

 Standard footprint

 Surface mountable

 Industry standard pin out

 Low profile: 0.48”

 Fixed frequency operation

 Input UVLO, Output OCP, OVP

 No minimum load required

 2:1 input voltage range

 ISO 9001, TL 9000, ISO 14001, QS

9000, OHSAS 18001 certified

manufacturing facility

 UL/cUL 60950 (US & Canada)

Recognized, and TUV (EN60950)

Certified

 CE mark meets 73/23/EEC and

93/68/EEC directives

Delphi Series S48SS, 15W Family DC/DC Power Module: 48V in, 12V/1.25A out

The Delphi Series S48SS, surface mountable, 48V input, single output,

isolated DC/DC converter, is the latest offering from a world leader in power system and technology and manufacturing－ Delta Electronics,

Inc. This product family provides up to 15 watts of power or up to 4.5A

of output current (for 3.3V and below) in an industry standard footprint.

With creative design technology and optimization of component

placement, the Delphi Series Small Power converters possess

outstanding electrical and thermal performance, as well as extremely

high reliability under highly stressful operating conditions. All models

are protected from abnormal input/output voltage and current

conditions. An encapsulated version is available for the most robust

performance in harsh environments.

Applications

 Telecom/DataCom

 Wireless Networks

 Optical Network Equipment  Server and Data Storage

 Industrial/Test Equipment

DATASHEET

DS_S48SS12001_06082006

Delta Electronics, Inc.

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TECHNICAL SPECIFICATIONS

(TA=25°C, airflow rate=300 LFM, Vin=48Vdc, nominal Vout unless otherwise noted.)

PARAMETER NOTES and CONDITIONS S48SS12001NRFA

Min. Typ. Max. Units

ABSOLUTE MAXIMUM RATINGS

Input Voltage

Continuous 80 Vdc Transient (100ms) 100ms 100 Vdc

Operating Temperature Refer to Figure 12 for the measuring point -40 100 °C Storage Temperature -55 125 °C Input/Output Isolation Voltage 1 minute 1500 Vdc

INPUT CHARACTERISTICS

Operating Input Voltage 36 48 75 V Input Under-Voltage Lockout

Turn-On Voltage Threshold 33.8 34.5 35.8 V Turn-Off Voltage Threshold 32.0 33.5 34.5 V Lockout Hysteresis Voltage 0.5 1.5 2.5 V

Maximum Input Current 100% Load, 36Vin 0.6 A No-Load Input Current 25 mA Off Converter Input Current 1 Inrush Current(I2t) 0.01 A2s Input Reflected-Ripple Current P-P thru 12µH inductor, 5Hz to 20MHz 5 mA Input Voltage Ripple Rejection 120 Hz 55 dB

OUTPUT CHARACTERISTICS

Output Voltage Set Point Vin=48V, Io=50% Io, max, Tc=25℃ 11.76 12.00 12.24 Output Voltage Regulation

Over Load Io=Io,min to Io,max ±12 ±60 mV Over Line Vin=36V to 75V ±12 ±36 mV Over Temperature Tc=-40℃ to 100℃ 100 300

Total Output Voltage Range Over sample load, line and temperature TBD TBD V Output Voltage Ripple and Noise 5Hz to 20MHz bandwidth

Peak-to-Peak Full Load, 1µF ceramic, 10µF tantalum 50 100 mV

RMS Full Load, 1µF ceramic, 10µF tantalum 15 Operating Output Current Range 0 1.25 A Output DC Current-Limit Inception Output Voltage 10% Low 1.5 2 2.5 A

DYNAMIC CHARACTERISTICS

Output Voltage Current Transient 48V, 10µF Tan & 1µF Ceramic load cap, 0.1A/µs

Positive Step Change in Output Current 50% Io, max to 75% Io, max 100 240 mV

Negative Step Change in Output Current 75% Io, max to 50% Io, max 100 240 mV

Setting Time to 1% of Final Value 600 µs Turn-On Transient

Start-Up Time, From On/Off Control 35 50 ms

Start-Up Time, From Input 35 50

Maximum Output Capacitance Full load; 5% overshoot of Vout at startup 47 µF

EFFICIENCY

100% Load

ISOLATION CHARACTERISTICS

Isolation Voltage 1500 V Isolation Resistance 100 MΩ Isolation Capacitance 500 pF

FEATURE CHARACTERISTICS

Switching Frequency 260 kHz ON/OFF Control, (Logic Low-Module ON)

Logic Low Von/off at Ion/off=1.0mA 0 0.8 V

Logic High Von/off at Ion/off=0.0 µA 15 V

ON/OFF Current Ion/off at Von/off=0.0V 1 mA

Leakage Current Logic High, Von/off=15V 50 µA Output Voltage Trim Range Output Over-Voltage Protection Over full temp range; % of nominal Vout 115 125 140 %

GENERAL SPECIFICATIONS

Calculated MTBF Io=80% of Io, max; Tc=40°C 3 M hours Weight 12.5 grams

84 86.5 %

Across Trim Pin & +Vo or -Vo, Pout≦max rated power -10 +10 %

m/℃

DS_s48SS12001_06082006

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ELECTRICAL CHARACTERISTICS CURVES

)

36Vin 48Vi n 75Vi n

EFF ICIEN CY (%)

POWE R D ISSIPATIO N ( W

4.0

3.5

3.0

2.5

36Vin

48Vin 75Vin

0.25 0.5 0.75 1 1.25

OUTPUT CURRENT (A)

Figure 1: Efficiency vs. load current for minimum, nominal, and

maximum input voltage at 25

°C.

0.6

0.5

INPUT CURRENT (A)

0.4

0.3

Io=1.25A Io=0.75A

Io=0.125A

2.0

1.5

1.0

0.5

0.0

0.25 0.5 0.75 1 1.25

OUTPUT CURRENT (A)

Figure 2: Power dissipation vs. load current for minimum,

nominal, and maximum input voltage at 25

°C.

0.2

0.1

0.0

30 35 40 45 50 55 60 65 70 75

INPU T VOLTAGE (V)

Figure 3: Typical input characteristics at room temperature. Figure 4: Turn-on transient at full rated load current (resistive

load) (10 ms/div). Top Trace: Vout (5V/div); Bottom Trace:

ON/OFF Control (2V/div).

DS_s48SS12001_06082006

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ELECTRICAL CHARACTERISTICS CURVES



)

Figure5: Turn-on transient at zero load current (10 ms/div). Top

Trace: Vout (5V/div); Bottom Trace: ON/OFF Control (2V/div).

TEST

12uH

Cs:68uF/100V 68uF/100V ESR< 0.3 ESR< 0.3

Ω

20﹫100KHz℃20 ℃100KHz﹫

Ω

Vi(+)

Vi(-)

Figure 6: Output voltage response to step-change in load

current (50%-75%-50% of Io, max; di/dt = 0.1A/µs). Load cap: 10µF, 100 m ceramic capacitor. Top Trace: Vout (50mV/div), Bottom Trace: Iout (0.5A/div).

Ω

ESR tantalum capacitor and 1µF

Figure 7: Test set-up diagram showing measurement points for

Input Reflected Ripple Current (Figure 8). Note: Measured input reflected-rip source Inductance (L battery impedance.

of 12 µH. Capacitor Cs offset possible

TEST

le current with a simulated

DS_s48SS12001_06082006

Figure 8: Input Reflected Ripple Current, i output current and nominal input voltage with 12µH source

impedance and 68µF electrolytic capacitor (2 mA/div)

, at full rated

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ELECTRICAL CHARACTERISTICS CURVES

StripCopper

Vo(+)

SCOPE RESISTIV

10u

Vo(-)

LOAD

Figure 9: Output voltage noise and ripple measurement test

setup. Scope measurement should be made using a BNC cable (length shorter than 20 inches). Position the load between 51 mm to 76 mm (2 inches to 3 inches) from the module.

14.0

12.0

10.0

OUT PUT VOLTAG E (V)

8.0

6.0

4.0

2.0

0.0

0.0 0.5 1.0 1.5 2.0 2.5

Vin= 48V

LOAD CURRENT (A)

Figure 11: Output voltage vs. load current showing typical current limit curves and converter shutdown points.

Figure 10: Output voltage ripple at nominal input voltage and

rated load current (20 mV/div). Load capacitance: 1µF ceramic

capacitor and 10µF tantalum capacitor. Bandwidth: 20 MHz.

DS_s48SS12001_06082006

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THERMAL CURVES:

Top View

S48SS12001NR A Output Current vs. Ambient Temperature and Air Velocity @Vin < 60V

Output Current(A)

1.3

1.2

1.1

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

0.0 75 80 85 90 95 100 105

Natural

Convection

100LFM

200LFM

300LFM

600LFM

500LFM

400LFM

Ambient Temperature (℃)

Figure 12: Case temperature measurement location. Pin locations are for reference only.

Figure 13: Output current vs. ambient temperature and air velocity (Vin <60V)

S48SS12001NR A Output Current vs. Ambient Temperature and Air Velocity @Vin = 75V

Output Current(A)

1.3

1.2

1.1

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

0.0 70 75 80 85 90 95 100

Natural

Convection

100LFM

200LFM

300LFM

Figure 14: Output current vs. ambient temperature and air velocity (Vin=75V)

600LFM

500LFM

400LFM

Ambient Temperature (℃)

Figure 15: Power dissipation vs. ambient temperature and air

velocity.

S48SS12001NR A Power Dissipation vs. Ambient Temperature and Air Velocity

Power Dissipation (Watts)

3.2

3.0

2.8

2.6

2.4

2.2

2.0

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

0.0 70 75 80 85 90 95 100 105

Natural

Convection

100LFM

200LFM

300LFM

600LFM

500LFM

400LFM

Ambient Temperature (℃)

DS_s48SS12001_06082006

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DESIGN CONSIDERATION

Input Source Impedance

The impedance of the input source connecting to the DC/DC power modules will interact with the modules and affect the stability. A low ac-impedance input source is recommended. If the source inductance is more than a few µH, we advise adding a 10 to 100 µF electrolytic capacitor (ESR < 0.7 Ω at 100 kHz) mounted close to the input of the module to improve the stability.

Layout and EMC Considerations

Delta’s DC/DC power modules are designed to operate in a wide variety of systems and applications. For design assistance with EMC compliance and related PWB layout issues, please contact Delta’s technical support team. An external input filter module is available for easier EMC compliance design. Application notes to assist designers in addressing these issues are pending release.

Safety Considerations

The power module must be installed in compliance with the spacing and separation requirements of the enduser’s safety agency standard if the system in which the power module is to be used must meet safety agency requirements.

When the input source is 60Vdc or below, the power module meets SELV (safety extra-low voltage) requirements. If the input source is a hazardous voltage which is greater than 60 Vdc and less than or equal to 75 Vdc, for the module’s output to meet SELV requirements, all of the following must be met:

 The input source must be insulated from any

hazardous voltages, including the ac mains, with reinforced insulation.

 One Vi pin and one Vo pin are grounded, or all the

input and output pins are kept floating.

 The input terminals of the module are not operator

accessible.

 A SELV reliability test is conducted on the system

where the module is used to ensure that under a single fault, hazardous voltage does not appear at the module’s output.

Do not ground one of the input pins without grounding one of the output pins. This connection may allow a nonSELV voltage to appear between the output pin and ground.

This power module is not internally fused. To achieve optimum safety and system protection, an input line fuse is highly recommended. The safety agencies require a normal-blow fuse with 1A maximum rating to be installed in the ungrounded lead. A lower rated fuse can be used based on the maximum inrush transient

energy and maximum input current.

Soldering and Cleaning Considerations

Post solder cleaning is usually the final board assembly process before the board or system undergoes electrical testing. Inadequate cleaning and/or drying may lower the reliability of a power module and severely affect the finished circuit board assembly test. Adequate cleaning and/or drying is especially important for un-encapsulated and/or open frame type power modules. For assistance on appropriate soldering and cleaning procedures, please contact Delta’s technical support team.

DS_s48SS12001_06082006

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FEATURES DESCRIPTIONS

Over-Current Protection

The modules include an internal output over-current protection circuit, which will endure current limiting for an unlimited duration during output overload. If the output current exceeds the OCP set point, the modules will automatically shut down (hiccup mode).

The modules will try to restart after shutdown. If the overload condition still exists, the module will shut down again. This restart trial will continue until the overload condition is corrected.

Over-Voltage Protection

The modules include an internal output over-voltage protection circuit, which monitors the voltage on the output terminals. If this voltage exceeds the overvoltage set point, the module will shut down and latch off. The over-voltage latch is reset by cycling the input power or by togging the ON/OFF signal for one second.

Output Voltage Adjustment (TRIM)

To increase or decrease the output voltage set point, the modules may be connected with an external resistor between the TRIM pin and either the Vo+ or Vo -. The TRIM pin should be left open if this feature is not used.

Vo(+)

Trim

Vo(-)

Figure 16: Circuit configuration for trim-down (decrease output

voltage)

If the external resistor is connected between the TRIM and Vo+ pins, the output voltage set point decreases. The external resistor value required to obtain a percentage of output voltage change △Vo% is defined as:

Vo4.248732.222

downRtrim

=− 32.3

∆−

07.0Vo12

+∆

Ex. When trim-down –10% (12V X 0.9 =10.8V)

×−

=− 50.15232.3

downRtrim

+×

1.04.248732.222

07.01.012

trim-down

[]

ΚΩ−

[]

ΚΩ=−

Vo(+)

Trim

trim-up

Vo(-)

Figure 17: Circuit configuration for trim-up (increase output

voltage)

If the external resistor is connected between the TRIM and Vo - the output voltage set point increases. The external resistor value required to obtain a percentage output voltage change △Vo% is defined as:

=− 32.3

upRtrim

Ex. When trim-up +10% (12V X 1.1 = 13.2V)

=− 39.1932.3

upRtrim

Care should be taken to ensure that the maximum output power of the module remains at or below the maximum rated power.

668.25

−∆

07.0Vo12

668.25

−×

07.01.012

[]

ΚΩ−

[]

ΚΩ=−

Remote ON/OFF

The remote on/off feature on the module can be either negative or positive logic. Negative logic turns the module on during a logic low and off during a logic high. Positive logic turns the modules on during a logic high and off during a logic low. Remote on/off can be controlled by an external switch between the on/off terminal and the Vi(-) terminal. The switch can be an open collector or open drain. If the remote on/off feature is not used, please short the on/off pin to Vi(-) for negative logic and let the pin open for positive logic.

Vi(+) Vo(+)

ON/OFF

Vi(-)

Trim

Vo(-)

Figure 18: Circuit Configuration for Remote ON/OFF

DS_s48SS12001_06082006

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THERMAL CONSIDERATIONS

)

Thermal management is an important part of the system design. To ensure proper, reliable operation, sufficient cooling of the power module is needed over the entire temperature range of the module. Convection cooling is usually the dominant mode of heat transfer.

Hence, the choice of equipment to characterize the thermal performance of the power module is a wind tunnel.

Thermal Testing Setup

Delta’s DC/DC power modules are characterized in heated vertical wind tunnels that simulate the thermal environments encountered in most electronics equipment. This type of equipment commonly uses vertically mounted circuit cards in cabinet racks in which the power modules are mounted.

The following figure shows the wind tunnel characterization setup. The power module is mounted on a test PWB and is vertically positioned within the wind tunnel. The space between the neighboring PWB and the top of the power module or a heat sink is

6.35mm (0.25”).

Thermal Derating

Heat can be removed by increasing airflow over the module. Figure 13 and 14 show maximum output is a function of ambient temperature and airflow rate. The module’s maximum case temperature is +100°C. To enhance system reliability, the power module should always be operated below the maximum operating temperature. If the temperature exceeds the maximum module temperature, reliability of the unit may be affected.

TEMPERATURE

MEASURED BELOW

Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches)

Figure 19: Wind tunnel test setup

FACING PWB

AIR VELOCIT AND AMBIENT

THE MODULE

PWB

MODULE

50.8 (2.0”

IR FLOW

10 (0.4”)

DS_s48SS12001_06082006

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MECHANICAL DRAWING

Pin No. Name Function

1 +Vout Positive output voltage 2 -Vout Negative output voltage 3 Trim Output voltage trim 4 NC No Connection 5 NC No Connection 6 NC No Connection 7 NC No Connection 8 ON/OFF ON/OFF Logic

9 NC No Connection 10 NC No Connection 11 -Vin Negative input voltage 12 +Vin Positive input voltage

DS_s48SS12001_06082006

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PART NUMBERING SYSTEM

S 48 S S 120 01 N R F A

Form

Factor

S- Small

Power

Input

Voltage

48V-

36V~75V

Number of

Outputs

S- Single S- SMD 120- 12.0V 01- 1.25A N- Negative

Product

Series

Output

Voltage

Output

Current

ON/OFF

Logic

P- Positive

Pin Length Option

Code

R- SMD Pin

F- RoHS 6/6 (Lead Free)

A- Standard Function

MODEL LIST

MODEL NAME INPUT OUTPUT EFF @ 100% LOAD

S48SS1R805NRFA 36V~75V 0.5A 1.8V 5.0A 80.0% S48SS2R504NRFA 36V~75V 0.5A 2.5V 4.5A 83.0% S48SS3R303NRFA 36V~75V 0.5A 3.3V 3.0A 84.0% S48SS3R304NRFA 36V~75V 0.6A 3.3V 4.5A 86.0% S48SS05002NRFA 36V~75V 0.5A 5.0V 2.0A 84.0% S48SS05003NRFA

S48SS12001NRFA 36V~75V 0.6A 12V 1.25A 86.5%

CONTACT:

USA:

Telephone: East Coast: (888) 335 8201 West Coast: (888) 335 8208 Fax: (978) 656 3964

Email: [email protected]

www.delta.com.tw/dcdc

WARRANTY

Delta offers a two (2) year limited warranty. Complete warranty information is listed on our web site or is available upon request from Delta.

Information furnished by Delta is believed to be accurate and reliable. However, no responsibility is assumed by Delta for its use, nor for any infringements of patents or other rights of third parties, which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Delta. Delta reserves the right to revise these specifications at any time, without notice.

36V~75V 0.6A 5.0V 3.0A 86.5%

Europe:

Phone: +41 31 998 53 11 Fax: +41 31 998 53 53 Email:

[email protected]

Asia & the rest of world:

Telephone: +886 3 4526107 ext 6220 Fax: +886 3 4513485

[email protected]

Email:

DS_s48SS12001_06082006