Delta Electronics Delphi E48SR12007 Manuel utilisateur

DATASHEET

DS_E48SR12007_05222008

FEATURES

High efficiency: 92.0% @ 12V/7A

Size: 58.4mmx22.80mmx8.4mm

(2.30”x0.90”x0.33”)

Standard footprint

Industry standard pin out

2:1 Input voltage range

Fixed frequency operation

Input UVLO, Output OCP, OVP, OTP

2250V isolation and basic insulation

No minimum load required

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

OHSAS18001 certified manufacturing

facility

UL/cUL 60950-1 (US & Canada)

recognized, and TUV (EN60950-1)

certified

CE mark meets 73/23/EEC and

93/68/EEC directive

APPLICATIONS

Telecom/Datacom

Wireless Networks

Optical Network Equipment

Server and Data Storage

Industrial/Test Equipment

OPTIONS

Positive On/Off logic

Short pin lengths

SMD pin

Delphi Series E48SR12007, 84W Eighth Brick

DC/DC Power Modules: 48V in, 12V/7A out

The Delphi Series E48SR12007 Eighth Brick, 48V input, single output,

isolated DC/DC converter is the latest offering from a world leader in

power systems technology and manufacturing ―Delta Electronics,

Inc. This product provides 84 watts of power with 92.0% efficiency in

an industry standard footprint. With creative design technology and

optimization of component placement, this converter possesses

outstanding electrical and thermal performances, as well as extremely

high reliability under highly stressful operating conditions. All Delphi

E48SR models are fully protected from abnormal input/output voltage,

current, temperature conditions and also meet all safety requirements

with basic insulation.

E48SR12007_05222008

TECHNICAL SPECIFICATIONS

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

PARAMETER NOTES and CONDITIONS E48SR12007 (Standard)

Min. Typ. Max. Units

ABSOLUTE MAXIMUM RATINGS

Input Voltage

Continuous 80 Vdc

Transient (100ms) 100ms 100 Vdc

Operating Temperature Refer to Figure21 for measuring point -40 115 °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 33 34 35 Vdc

Turn-Off Voltage Threshold 31 32 33 Vdc

Lockout Hysteresis Voltage 1 2 3 Vdc

Maximum Input Current 100% Load, 36Vin 3.0 A

No-Load Input Current 60 100 mA

Off Converter Input Current 3 10 mA

Inrush Current (I2t) 1 A2s

Input Reflected-Ripple Current P-P thru 12µH inductor, 5Hz to 20MHz 25 mA

Input Voltage Ripple Rejection 120 Hz 50 dB

OUTPUT CHARACTERISTICS

Output Voltage Set Point Vin=48V, Io=Io.max, Tc=25°C 11.880 12.000 12.120 Vdc

Output Voltage Regulation

Over Load Io=Io,min to Io,max ±10 ±15 mV

Over Line Vin=36V to 75V ±10 ±15 mV

Over Temperature Tc=-40°C to 85°C ±100 mV

Total Output Voltage Range Over sample load, line and temperature 11.76 12.24 Vdc

Output Voltage Ripple and Noise 5Hz to 20MHz bandwidth

Peak-to-Peak Full Load, 1µF ceramic, 10µF tantalum 40 120 mV

RMS Full Load, 1µF ceramic, 10µF tantalum 10 25 mV

Operating Output Current Range 0 7 A

Output Over Current Protection 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 200 360 mV

Negative Step Change in Output Current 75% Io.max to 50% Io.max 200 360 mV

Settling Time (within 1% Vout nominal) 200 us

Turn-On Transient

Start-Up Time, From On/Off Control 6 12 ms

Start-Up Time, From Input 6 12 ms

Maximum Output Capacitance Full load; 5% overshoot of Vout at startup 2000 µF

EFFICIENCY

100% Load 92.0 %

60% Load 92.0 %

ISOLATION CHARACTERISTICS

Input to Output 2250 Vdc

Isolation Resistance 100 MΩ

Isolation Capacitance 1500 pF

FEATURE CHARACTERISTICS

Switching Frequency 350 kHz

ON/OFF Control, Negative Remote On/Off logic

Logic Low (Module On) Von/off at Ion/off=1.0mA 0 0.7 V

Logic High (Module Off) Von/off at Ion/off=0.0 µA 2.4 18 V

ON/OFF Control, Positive Remote On/Off logic

Logic Low (Module Off) Von/off at Ion/off=1.0mA 0 0.7 V

Logic High (Module On) Von/off at Ion/off=0.0 µA 2.4 18 V

ON/OFF Current (for both remote on/off logic) Ion/off at Von/off=0.0V 0.7 1 mA

Leakage Current (for both remote on/off logic) Logic High, Von/off=15V 50 uA

Output Voltage Trim Range Pout ≦max rated power -10 10 %

Output Voltage Remote Sense Range Pout ≦max rated power 10 %

Output Over-Voltage Protection Over full temp range; 14.4 V

GENERAL SPECIFICATIONS

MTBF Io=80% of Io, max; Ta=25°C, airflow rate=200FLM 2.03 M hours

Weight 19.6 Grams

Over-Temperature Shutdown Refer to Figure 21 for measuring point 120 °C

E48SR12007_05222008

ELECTRICAL CHARACTERISTICS CURVES

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

maximum input voltage at 25°C, 300LFM airflow.

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

nominal, and maximum input voltage at 25°C, 300LFM airflow.

Figure 3: Typical full load input characteristics at 25°C

E48SR12007_05222008

ELECTRICAL CHARACTERISTICS CURVES

For Negative Remote On/Off Logic

Figure 4: Turn-on transient at full rated load current (resistor

load) (2ms/div). Vin=48V. Top Trace: Vout, 5V/div; Bottom

Trace: ON/OFF input, 5V/div

Figure 5: Turn-on transient at zero load current (2ms/div).

Vin=48V. Top Trace: Vout, 5V/div; Bottom Trace: ON/OFF input,

5V/div

For Positive Remote On/Off Logic

Figure 6: Turn-on transient at full rated load current (resistor

load) (2ms/div) for positive on/off mode. Vin=48V. Top Trace:

Vout, 5V/div; Bottom Trace: ON/OFF input, 5V/div

Figure 7: Turn-on transient at zero load current (2ms/div) for

positive on/off mode. Vin=48V. Top Trace: Vout, 5V/div; Bottom

Trace: ON/OFF input, 5V/div

E48SR12007_05222008

ELECTRICAL CHARACTERISTICS CURVES

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

current (75%-50%-75% of Io, max; di/dt = 0.1A/µs). Load cap:

10µF tantalum capacitor and 1µF ceramic capacitor. Top Trace:

Vout (0.2V/div, 200us/div), Bottom Trace: Iout (1

/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

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

current (75%-50%-75% of Io, max; di/dt = 2.5A/µs). Load cap:

47µF, 35m

ESR solid electrolytic capacitor and 1µF ceramic

capacitor. Top Trace: Vout (0.2V/div, 200us/div

)

, Bottom Trace:

Iout (1A/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

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 (LTEST

)

of 12 μH. Capacitor Cs offset

possible battery impedance. Measured current as shown below

Figure 11: Input Terminal Ripple Current, ic, at full rated output

current and nominal input voltage with 12µH source impedance

and 33µF electrolytic capacitor (500 mA/div, 2us/div)

E48SR12007_05222008

ELECTRICAL CHARACTERISTICS CURVES

Figure 12: Input reflected ripple current, is, through a 12µH

source inductor at nominal input voltage and rated load current

(20 mA/div, 2us/div)

Figure 13: Output voltage noise and ripple measurement test

setup

012345678910

LOAD CURRENT (A)

OUTPUT VOLTAGE (V

)

48V

Figure 14: Output voltage ripple at nominal input voltage and

rated load current (Io=7A)(20 mV/div, 2us/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.

Figure 15: Output voltage vs. load current showing typical

current limit curves and converter shutdown points

StripCopper

Vo(-)

Vo(+)

10u 1u SCOPE RESISTIV

LOAD

E48SR12007_05222008

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 Ωat 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

normal-blow fuse with 10A 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 are 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.

E48SR12007_05222008

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

over-voltage set point, the module will shut down

(Hiccup mode). The modules will try to restart after

shutdown. If the fault condition still exists, the module

will shut down again. This restart trial will continue until

the fault condition is corrected.

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.

The module will try to restart after shutdown. If the

over-temperature condition still exists during restart, the

module will shut down again. This restart trial will

continue until the temperature is within specification.

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 logic high.

Positive logic turns the modules on during logic high and

off during 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.

Vo(+)Vi(+)

Vo(-)

Sense(-)

Sense(+)

Vi(-)

ON/OFF

Figure 16: Remote on/off implementation

Remote Sense

Remote sense compensates for voltage drops on the

output by sensing the actual output voltage at the point

of load. The voltage between the remote sense pins

and the output terminals must not exceed the output

voltage sense range given here:

[Vo(+) – Vo(–)] – [SENSE(+) – SENSE(–)] ≤10% ×Vout

This limit includes any increase in voltage due to

remote sense compensation and output voltage set

point adjustment (trim).

Vi(-)

Vi(+)

Vo(-)

Vo(+)

Sense(+)

Sense(-)

Resistance

Contact Contact and Distributio

Losses

Figure 17: Effective circuit configuration for remote sense

operation

If the remote sense feature is not used to regulate the

output at the point of load, please connect SENSE(+) to

Vo(+) and SENSE(–) to Vo(–) at the module.

The output voltage can be increased by both the

remote sense and the trim; however, the maximum

increase is the larger of either the remote sense or the

trim, not the sum of both.

When using remote sense and trim, 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 does not exceed the maximum rated

power.

E48SR12007_05222008

FEATURES DESCRIPTIONS (CON.)

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 SENSE(+) or

SENSE(-). The TRIM pin should be left open if this feature

is not used.

Figure 18: Circuit configuration for trim-down (decrease

output voltage)

If the external resistor is connected between the TRIM

and SENSE (-) pins, the output voltage set point

decreases (Fig. 18). The external resistor value required

to obtain a percentage of output voltage change △% is

defined as:

()

⎥

⎦

⎤

⎢

⎣

⎡−

=− KdownRtrim 22.10

511

Ex. When Trim-down -10%(12V×0.9=10.8V)

() ()

Ω=Ω

⎥

⎦

⎤

⎢

⎣

⎡−=− KKdownRtrim 88.4022.10

511

Figure 19: Circuit configuration for trim-up (increase output

voltage)

If the external resistor is connected between the TRIM

and SENSE (+), the output voltage set point increases

(Fig. 19). The external resistor value required obtaining a

percentage output voltage change △% is defined as:

()

Ω−

−

Δ+××

=− K

upRtrim 22.10

511

225.1 )100(11.5

Ex. When Trim-up +10%(12 V×1.1=13.2V)

()

Ω=−−

=− KupRtrim 3.48922.10

511

10225.1 )10100(1211.5

The output voltage can be increased by both the remote

sense and the trim, however the maximum increase is

the larger of either the remote sense or the trim, not the

sum of both.

When using remote sense and trim, 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.

E48SR12007_05222008

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 is constantly kept at

6.35mm (0.25’’).

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

12.7 (0.5”)

MODULE

IRFLO

50.8

(

2.0”

)

FACING PWB PWB

AIR VELOCIT

AND AMBIENT

TEMPERATURE

MEASURED BELOW

THE MODULE

Figure 20: Wind tunnel test setup

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 21: Hot spot temperature measured point

＊

The allowed maximum hot spot temperature is defined at 115

℃

E48SR12007(Standard) Output Current vs. Ambient Temperature and Air Velocity

@Vin = 48V (Transverse Orientation)

0.0

1.0

2.0

3.0

4.0

5.0

6.0

7.0

20 25 30 35 40 45 50 55 60 65 70 75 80 85

Ambient Temperature (℃)

Output Current(A)

Natural

Convection

100LFM

200LFM

300LFM

400LFM

500LFM

Figure 22: Output current vs. ambient temperature and air

velocity@Vin=48V (Transverse Orientation)

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