Datasheet S48SP3R310NRFB, S48SP05007NRFB, S48SP12003NRFB, S48SP15002NRFB Datasheet (Delta Electronics)

Delphi Series S48SP, 35W 1x1 Brick
DC/DC Power Modules: 48V in, 5V/7A out

The Delphi Series S48SP, 1x1 Brick, 48V input, single output, isolated

DC/DC converters are the latest offering from a world leader in power

systems technology and manufacturing -- Delta Electronics, Inc. This

product family is available in a surface mount or through-hole package

and provides up to 35 watts of power or 10A of output current (3.3V and

below) in a new 1x1 form factor (1.3”x0.96”x0.33”). The pinout is

compatible with the industry standard 1x2 products. With creative

design technology and optimization of component placement, these

converters possess outstanding electrical and thermal performance, as

well as extremely high reliability under highly stressful operating

conditions. Typical efficiency of the 5V/7A module is 90%. All modules

are fully protected against abnormal input/output voltage, current, and

temperature conditions.

FEATURES

 High efficiency: 90% @5V/7A

 Industry standard 1x2 pin out

 Size: 33.0x24.4x8.55mm

(1.30”x0.96”x0.34”)

 SMD and Through-hole versions

 Fixed frequency operation

 2:1 input voltage range

 Input UVLO, OVP

 OTP and output OCP, OVP (default is

auto-restart)

 Output voltage trim ±10%

 Negative On/Off
 Monotonic startup into normal and

pre-biased loads

 2250V isolation and basic insulation

 No minimum load required

 ISO 9001, TL 9000, ISO 14001, QS9000,

OHSAS18001 certified manufacturing facility

 UL/cUL 60950 (US & Canada) recognized,

and TUV (EN60950) certified

 CE mark meets 73/23/EEC and 93/68/EEC

directive

OPTIONS

 Positive On/Off or no On/Off

 OTP and Output OVP, OCP mode,

Auto recovery (default) or latch-up

 SMD module available

 Short pin lengths

 Encapsulated case optional

APPLICATIONS

 Optical Transport

 Data Networking

 Communications, including Wireless and

traditional Telecom

 Servers

DATASHEET
DS_S48SP05007_05222008

TECHNICAL SPECIFICATIONS

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

PARAMETER NOTES and CONDITIONS S48SP05007 (Standard)

ABSOLUTE MAXIMUM RATINGS

Input Voltage

Continuous 80 Vdc

Transient(100ms) 100ms 100 Vdc
Operating Case Temperature Refer to Figure 20 for measuring point -40 +111 °C
Storage Temperature -55 +125 °C
Input/Output Isolation Voltage 2250 Vdc

INPUT CHARACTERISTICS

Operating Input Voltage 36 75 Vdc
Input Under-Voltage Lockout

Turn-On Voltage Threshold 32.5 34 35.5 Vdc

Turn-Off Voltage Threshold 30.5 32 33.5 Vdc

Lockout Hysteresis Voltage 1.0 2.0 3.0 Vdc

Maximum Input Current 100% Load, 36Vin 1.10 A
No-Load Input Current 35 mA
Off Converter Input Current 10 mA
Inrush Current (I2t) 0.01 A2s
Input Reflected-Ripple Current P-P thru 12µH inductor, 5Hz to 20MHz 10 mA
Input Voltage Ripple Rejection 120 Hz 60 dB

OUTPUT CHARACTERISTICS

Output Voltage Set Point Vin=48V, Io=Io.max, Tc=25°C 4.925 5.0 5.075 Vdc
Output Voltage Regulation

Over Load Io=Io, min to Io, max ±3 ±10 mV

Over Line Vin=36V to 75V ±3 ±10 mV

Over Temperature Tc=-40°C to 100°C ±50 mV

Total Output Voltage Range Over load, line and temperature 4.85 5.15 V
Output Voltage Ripple and Noise 5Hz to 20MHz bandwidth

Peak-to-Peak Full Load, 1µF ceramic, 10µF tantalum 30 mV

RMS Full Load, 1µF ceramic, 10µF tantalum 10 mV

Operating Output Current Range 0 7 A
Output DC Current-Limit Inception Output Voltage 10% Low 110 140 %

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 150 mV

Negative Step Change in Output Current 75% Io.max to 50% Io.max 150 mV

Settling Time (within 1% Vout nominal) 100 us

Turn-On Transient

Start-Up Time, From On/Off Control 25 30 ms

Start-Up Time, From Input 25 30 ms

Maximum Output Capacitance Full load; 5% overshoot of Vout at startup 3000 µF

EFFICIENCY

100% Load 90.0 %
60% Load 88.5 %

ISOLATION CHARACTERISTICS

Input to Output 2250 Vdc
Isolation Resistance 10 MΩ
Isolation Capacitance 1000 pF

FEATURE CHARACTERISTICS

Switching Frequency 400 kHz
ON/OFF Control, Negative Remote On/Off logic

Logic Low (Module On) Von/off -0.7 0.8 V

Logic High (Module Off) Von/off 2 18 V

ON/OFF Control, Positive Remote On/Off logic

Logic Low (Module Off) Von/off -0.7 0.8 V

Logic High (Module On) Von/off 2 18 V

ON/OFF Current (for both remote on/off logic) Ion/off at Von/off=0.0V 0.25 mA

Leakage Current (for both remote on/off logic) Logic High, Von/off=15V 30 uA

Output Voltage Trim Range
Output Over-Voltage Protection Over full temp range 5.75 7.5 V

GENERAL SPECIFICATIONS

MTBF Io=80% of Io, max; Ta=25°C; air flow 300LFM 2.82 M hours
Weight 10.5 grams
Over-Temperature Shutdown Refer to Fig. 20 for measuring point 123 °C

Min. Typ. Max. Units

Across Pins 4 & 5, Pout ≦ max rated power

-10% 10% %

DS_S48SP05007_05222008

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ELECTRICAL CHARACTERISTICS CURVES

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

maximum input voltage at 25°C

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

nominal, and maximum input voltage at 25°C.

Figure 3: Typical full load input characteristics at room

temperature

DS_S48SP05007_05222008

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ELECTRICAL CHARACTERISTICS CURVES

For Negative Remote On/Off Logic

0

0

Figure 4: Turn-on transient at full rated load current (5 ms/div).

Vin=48V. Top Trace: Vout, 2V/div; Bottom Trace: ON/OFF input,

2V/div

For Positive Remote On/Off Logic

0

0

Figure 5: Turn-on transient at zero load current (5 ms/div).

Vin=48V. Top Trace: Vout, 2V/div, Bottom Trace: ON/OFF input,

2V/div

0

0

Figure 6: Turn-on transient at full rated load current (5 ms/div).

Vin=48V. Top Trace: Vout, 2V/div; Bottom Trace: ON/OFF input,
2V/div

0

0

Figure 7: Turn-on transient at zero load current (5 ms/div).

Vin=48V. Top Trace: Vout, 2V/div; Bottom Trace: ON/OFF input,
2V/div

DS_S48SP05007_05222008

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ELECTRICAL CHARACTERISTICS CURVES

)

)

0

0

Figure 8: Output voltage response to step-change in load

current (75%-50% of Io, max; di/dt = 0.1A/µs). Load cap: 10µF
tantalum capacitor and 1µF ceramic capacitor. Top Trace: Vout
(100mV/div, 50us/div), Bottom Trace: Iout (2A/div). 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

0

0

Figure 9: Output voltage response to step-change in load

current (50%-75% of Io, max; di/dt = 0.1A/µs). Load cap: 10µF
tantalum capacitor and 1µF ceramic capacitor. Top Trace: Vout
(100mV/div, 50us/div
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

, Bottom Trace: Iout (2A/div). Scope

Figure 10: Test set-up diagram showing measurement points
for Input Terminal Ripple Current and Input Reflected Ripple

Current.
Note: Measured input reflected-ripple current with a simulated
source Inductance (L
possible battery impedance. Measure current as shown below.

of 12 μH. Capacitor Cs offset

TEST

DS_S48SP05007_05222008

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ELECTRICAL CHARACTERISTICS CURVES

E

0

Figure 11: Input Terminal Ripple Current, i
current and nominal input voltage with 12µH source impedance
and 33µF electrolytic capacitor (100mA/div, 1us/div)

StripCopper

Vo(+)

10u

Vo(-)

Figure 13: Output voltage noise and ripple measurement test
setup

1u

, at full rated output

c

SCOPE RESISTIV

LOAD

0

Figure 12: Input reflected ripple current, i

source inductor at nominal input voltage and rated load current
(20 mA/div, 1us/div)

, through a 12µH

s

0

Figure 14: Output voltage ripple at nominal input voltage and
rated load current (Io=7A)(20 mV/div, 1us/div)

Load capacitance: 1µF ceramic capacitor and 10µF tantalum
capacitor. Bandwidth: 20 MHz. Scope measurements 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

DS_S48SP05007_05222008

Figure 15: Output voltage vs. load current showing typical

current limit curves and converter shutdown points

6

DESIGN CONSIDERATIONS

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
to release.

Safety Considerations

The power module must be installed in compliance with
the spacing and separation requirements of the
end-user’s safety agency standard, i.e., UL60950,
CAN/CSA-C22.2 No. 60950-00 and EN60950: 2000 and
IEC60950-1999, if the system in which the power
module is to be used must meet safety agency
requirements.

Basic insulation based on 75 Vdc input is provided
between the input and output of the module for the
purpose of applying insulation requirements when the
input to this DC-to-DC converter is identified as TNV-2
or SELV. An additional evaluation is needed if the
source is other than TNV-2 or SELV.

When the input source is SELV circuit, 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 the ac

mains by reinforced or double insulation.

 The input terminals of the module are not operator

accessible.

 If the metal baseplate is grounded, one Vi pin and

one Vo pin shall also be grounded.

 A SELV reliability test is conducted on the system

where the module is used, in combination with the
module, to ensure that under a single fault,

hazardous voltage does not appear at the module’s
output.

When installed into a Class II equipment (without
grounding), spacing consideration should be given to
the end-use installation, as the spacing between the
module and mounting surface have not been evaluated.

The power module has extra-low voltage (ELV) outputs
when all inputs are ELV.

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
fuse with 3A 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_S48SP05007_05222008

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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, and enter hiccup mode or
latch mode, which is optional.

For hiccup mode, the module 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.

For latch mode, the module will latch off once it
shutdown. The latch is reset by either cycling the input
power or by toggling the on/off signal for one second.

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 over-voltage
set point, the module will shut down, and enter in hiccup
mode or latch mode, which is optional.

For hiccup mode, the module 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.

For latch mode, the module will latch off once it
shutdown. The latch is reset by either cycling the input
power or by toggling the on/off signal for one second.

Over-Temperature Protection

The over-temperature protection consists of circuitry
that provides protection from thermal damage. If the
temperature exceeds the over-temperature threshold
the module will shut down, and enter in hiccup mode or
latch mode, which is optional.

For hiccup mode, the module 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.

For latch mode, the module will latch off once it
shutdown. The latch is reset by either cycling the input
power or by toggling the on/off signal for one second.

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.

For negative logic if the remote on/off feature is not
used, please short the on/off pin to Vi(-). For positive
logic if the remote on/off feature is not used, please
leave the on/off pin floating.

ON/OFF

ON/OFF

Vi(-)

Vi(-)

Vi(+)

Vi(+)

Vo(-)

Vo(-)

Trim

Trim

Vo(+)

Vo(+)

R

R

Load

Load

Figure 16: Remote on/off implementation

DS_S48SP05007_05222008

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FEATURES DESCRIPTIONS (CON.)

Output Voltage Adjustment

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 (-)

Vo (-)

ON/OFF

ON/OFF

ON/OFF

Vi (-)

Vi (-)

Vi (-)

Vi (+)

Vi (+)

Vi (+)

Figure 17: 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
(Fig. 17). The external resistor value required to obtain
an output voltage change from 5V to the desired
Vo_adj is defined as:

Rtrim_down

Ex. When Trim-down -10%

Vo_adj=5.0V×(1-10%)=4.5V

Rtrim_down

Rtrim_down 1.839 10

Vo (-)

Trim

Trim

Trim

Vo (+)

Vo (+)

Vo (+)

Vo_adj 2.5−( ) 5110⋅

5.0 Vo_adj−

4.5 2.5−( ) 5110⋅

5.0 4.5−

4

×=

ohm

R

R

Load

R

R

R

trim-d o w n

trim-d o w n

trim-d o w n

Load

2050−

2050−

ON/OFF

ON/OFF

Vi (-)

Vi (-)

Vi (+)

Vi (+)

Vo (-)

Vo (-)

Trim

Trim

Vo (+)

Vo (+)

R

R

trim-up

trim-up

R

R

Load

Load

Figure 18: 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 (Fig.

18). The external resistor value required to obtain an
output voltage change from 5V to the desired Vo_adj is
defined as:

Rtrim_up

2.5 5110⋅

Vo_adj 5.0−

2050−

Ex. When Trim-up +10%

Vo_adj=5.0V×(1+10%)=5.5V

Rtrim_up

Rtrim_up 2.35 10

2.5 5110⋅

5.5 5.0−

2050−

4

×=

ohm

When using trim function, the output voltage of the
module is usually increased, which increases the power
output of the module with the same output current.

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

DS_S48SP05007_05222008

9

THERMAL CONSIDERATIONS

A

Y

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 is constantly kept at

6.35mm (0.25’’).

FACING PWB

PWB

MODULE

Thermal Derating

Heat can be removed by increasing airflow over the module. 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.

THERMAL CURVES

Figure 20: Hot spot temperature measured point

＊

The allowed maximum hot spot temperature is defined at 111℃

Output Current(A)

8.0

7.0

S48SP05007(standard) Output Current vs. Ambient Temperature and Air Velocity

@Vin = 48V (Either Orientation )

AIR VELOCIT
AND AMBIENT

TEMPERATURE

MEASURED BELOW

THE MODULE

IR FLOW

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

50.8 (2.0”)

12.7 (0.5”)

Figure 19: Wind tunnel test setup

DS_S48SP05007_05222008

6.0

Natural

Convection

5.0

4.0

3.0

2.0

1.0

0.0

35 40 45 50 55 60 65 70 75 80 85

100LFM

200LFM

300L FM

400LFM

500LFM

600L FM

Ambient Temperature

Figure 21: Output current vs. ambient temperature and air velocity

=48V (Either Orientation)

@V

in

10

PICK AND PLACE LOCATION SURFACE-MOUNT TAPE & REEL

RECOMMENDED PAD LAYOUT (SMD)

DS_S48SP05007_05222008

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℃

LEADED (Sn/Pb) PROCESS RECOMMEND TEMP. PROFILE

Peak temp.

210~230°C 5sec.

Cooling down rate <3°C /sec.

Over 200°C

40~50sec.

300 60 0 120 180 240

Temperature (°C )

250

150

100

50

Ramp-up temp.

0.5~3.0°C /sec.

2nd Ramp-up temp.

Pre-heat temp.

140~180°C 60~120 sec.

Time ( sec. )

1.0~3.0°C /sec.

Note: The temperature refers to the pin of S48SP, measured on the pin +Vout joint.

LEAD FREE (SAC) PROCESS RECOMMEND TEMP. PROFILE

217℃

℃

200

.

Peak Temp. 240 ~ 245

Ramp down
max. 4℃/sec.

Temp

150

℃

Ramp up
max. 3℃/sec.

Preheat time

100~140 sec.

Time Limited 90 sec.
above 217

℃

25℃

Time

Note: The temperature refers to the pin of S48SP, measured on the pin +Vout joint.

DS_S48SP05007_05222008

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MECHANICAL DRAWING

Surface-mount module Through-Hole module

Pin No. Name Function

1
2
3
4
5
6

+Vin

-Vin
ON/OFF (Optional)

-Vout
TRIM (Optional)

+Vout

DS_S48SP05007_05222008

Positive input voltage
Negative input voltage
Remote ON/OFF (Optional)
Negative output voltage
Output voltage trim (Optional)
Positive output voltage

13

PART NUMBERING SYSTEM

S 48 S P 050 07 N

Product

Type

S - Small

Power

Input

Voltage

48 -

36V~75V

Number of

Outputs

S - Single 1x1, 10A 050 - 5V 07 - 7A

Product

Series

Output

Voltage

Output

Current

ON/OFF Logic

N - Negative

(Default)

P - Positive

E - No remote

on/off control pin

MODEL LIST

MODEL NAME INPUT OUTPUT EFF @ 100% LOAD

S48SP3R310NRFB 36V~75V 1.1A 3.3V 10A 89.0%

S48SP05007NRFB 36V~75V 1.2A 5.0V 7A 90.0%
S48SP12003NRFB 36V~75V 1.2A 12V 3A 90.0%
S48SP15002NRFB 36V~75V 1A 15V 2A 90.0%

Note:

1. Default OTP and output OVP, OCP mode is auto-restart;

2. For different option, please refer to part numbering system above or contact Delta local sales.

R

Pin

Length/Type

R - 0.170”

(Default)

N - 0.145”

K - 0.110”

M - SMD

F B

Option Code

F- RoHS 6/6

(Lead Free)

A - No trim pin

B - With trim pin

(Default)

CONTACT: www.delta.com.tw/dcdc

USA:

Telephone:
East Coast: [phone]
West Coast: [phone]
Fax: [phone]
Email: [e-mail]

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

.

Europe:

Telephone: [phone]
Fax: [phone]
Email: [e-mail]

Asia & the rest of world:

Telephone: [phone] x6220
Fax: [phone]
Email: [e-mail]

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