H48SN28012PNFA [DELTA]

Delphi Series H48SN, 350W HalfBrick Family DC/DC Power Modules: 48V in, 28V/12.5A out; 德尔福系列H48SN ， 350W HalfBrick系列DC / DC模块电源： 48V的， 28V / 12.5A了


型号：	H48SN28012PNFA
厂家：	DELTA ELECTRONICS, INC.
描述：	Delphi Series H48SN, 350W HalfBrick Family DC/DC Power Modules: 48V in, 28V/12.5A out 德尔福系列H48SN ， 350W HalfBrick系列DC / DC模块电源： 48V的， 28V / 12.5A了
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中文：	中文翻译
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FEATURES

ꢀ

High Efficiency: 91.0% @ 28V/12.5A

Size: 61.0x57.9x12.7mm (2.40”×2.28”×0.50”)

Standard footprint

Industry standard pin out

Fixed frequency operation

Metal baseplate

Input UVLO, Output OCP, OVP, OTP

Basic insulation

2250V isolation

2:1 Input voltage range

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

Delphi Series H48SN, 350W Half Brick Family

DC/DC Power Modules: 48V in, 28V/12.5A out

The Delphi Series H48SN Half 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 provides up to 350 watts of power in an

industry standard footprint. It provides 91% efficiency for 28V at full

load. 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. All models are fully protected

from abnormal input/output voltage, current, and temperature

conditions. The Delphi Series converters meet all safety

requirements with basic insulation. A variety of optional heatsinks are

available for extended thermal operation as well as for use in higher

air flow applications: 200 to 400 LFM.

OPTIONS

ꢀ

Positive Remote On/Off logic

Short pin lengths available

APPLICATIONS

ꢀ

Telecom/Datacom

Wireless Networks

Optical Network Equipment

Server and Data Storage

Industrial/Testing Equipment

DATASHEET

DS_H48SN28012_09262006

TECHNICAL SPECIFICATIONS

(T_A=25°C, airflow rate=600 LFM, V_in=48Vdc, nominal Vout unless otherwise noted.)

PARAMETER

NOTES and CONDITIONS

H48SN28012 (Standard)

Min.

Typ.

Max.

Units

ABSOLUTE MAXIMUM RATINGS

Input Voltage

Continuous

Transient (100ms)

Operating Temperature

Storage Temperature

100

110

125

2250

Vdc

°C

Vdc

100ms

Please refer to Fig.21 for measuring point

-40

-55

Input/Output Isolation Voltage

INPUT CHARACTERISTICS

Operating Input Voltage

Input Under-Voltage Lockout

Turn-On Voltage Threshold

Turn-Off Voltage Threshold

Lockout Hysteresis Voltage

Maximum Input Current

Minimum -Load Input Current

Off Converter Input Current

Inrush Current(I²t)

Input Reflected-Ripple Current

Input Voltage Ripple Rejection

OUTPUT CHARACTERISTICS

Output Voltage Set Point

Output Voltage Regulation

Over Load

Vdc

A²s

100% Load, 36Vin

12.6

260

0.2

Per ETSI EN300 132-2

P-P thru 12µH inductor, 5Hz to 20MHz

120 Hz

Vdc

Vin=48V, Io=Io.max, Tc=25°C

27.72

28.00

28.28

±20

±250

28.00

±112

±56

±300

28.75

Io=Io,min to Io,max

Vin=36V to 75V

Tc=-40°C to 100°C

Over Line

Over Temperature

Total Output Voltage Range

Output Voltage Ripple and Noise

Peak-to-Peak

over sample load, line and temperature

5Hz to 20MHz bandwidth

Full Load, 1µF ceramic, 10µF Low ESR cap

27.25

0.3

150

12.5

RMS

Operating Output Current Range

Output DC Current-Limit Inception

DYNAMIC CHARACTERISTICS

Output Voltage 10% Low

120

48V, Tested with a aluminum ,10µF Low ESR cap

and 1µF Ceramic load cap, ΔIo/Δt=1A/10µS

50% Io.max to 75% Io.max

Output Voltage Current Transient

Positive Step Change in Output Current

Negative Step Change in Output Current

Settling Time (within 1% Vout nominal)

Turn-On Transient

150

300

75% Io.max to 50% Io.max

Start-Up Time, From On/Off Control

Start-Up Time, From Input

Output Capacitive Load

EFFICIENCY

5000

µF

Full load; 5% overshoot of Vout at startup

330

100% Load

60% Load

91.0

91.5

ISOLATION CHARACTERISTICS

Input to Output

Input to Case

Output to Case

Isolation Resistance

Isolation Capacitance

FEATURE CHARACTERISTICS

Switching Frequency

2250

500

Vdc

MΩ

1900

330

kHz

ON/OFF Control Negative Remote On/Off logic

Logic Low (Module On)

Von/off at Ion/off=1.0mA

Von/off at Ion/off=0.0 µA

0.8

Logic High (Module Off)

ON/OFF Control, Positive Remote On/Off logic

Logic Low (Module Off)

Logic High (Module On)

ON/OFF Current

Von/off at Ion/off=1.0mA

Von/off at Ion/off=0.0 µA

Ion/off at Von/off=0.0V

0.8

Leakage Current

Logic High, Von/off=15V

Output Voltage Trim Range

Output Voltage Remote Sense Range

Output Over-Voltage Protection

GENERAL SPECIFICATIONS

MTBF

Across Pins 9 & 5, Pout ≦ max rated power

Pout ≦ max rated power

Over full temp range; % of nominal Vout

-40

+10

0.5

140

115

Io=80% of Io, max; Ta=25°C

1.35

115

M hours

grams

°C

Weight

Over-Temperature Shutdown

Please refer to Fig.21 for measuring point

H48SN28012_09262006

ELECTRICAL CHARACTERISTICS CURVES

45.0

40.0

35.0

30.0

25.0

20.0

15.0

10.0

5.0

36Vin

48Vin

75Vin

36Vin

48Vin

75Vin

0.0

OUTPUT CURRENT (A)

OUTPUT CURRENT(A)

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

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

maximum input voltage at 25°C.

nominal, and maximum input voltage at 25°C.

14.0

Io=12.5A

Io=7.5A

Io=1.25A

12.0

10.0

8.0

6.0

4.0

2.0

0.0

INPUT VOLTAGE (V)

Figure 3: Typical input characteristics at room temperature

H48SN28012_09262006

ELECTRICAL CHARACTERISTICS CURVES

For Negative Remote On/Off Logic

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

Figure 5: Turn-on transient at minimum load current

load) (10ms/div). CH3: Vout;5V/div; CH1: ON/OFF input: 2V/div

(10ms/div). CH3: Vout: 5V/div; CH1: ON/OFF input: 2V/div

For Positive Remote On/Off Logic

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

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

ON/OFF input: 2V/div

Figure 7: Turn-on transient at zero load current (10ms/div). Top

Trace: Vout: 5V/div; Bottom Trace: ON/OFF input: 2V/div

H48SN28012_09262006

ELECTRICAL CHARACTERISTICS CURVES

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

current (75%-50% of Io, max; di/dt = 1A/10µS). Load cap:

330µF aluminum,10uF Low ESR capacitor and 1µF ceramic

capacitor. Top Trace: Vout (100mV/div), Bottom Trace: Iout

(5A/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 (50%-75% of Io, max; di/dt = 1A/10µS). Load cap:

330µF aluminum,10uF Low ESR capacitor and 1µF ceramic

capacitor. Top Trace: Vout (100mV/div), Bottom Trace: Iout

(5A/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 (L_TEST) of 12 µH. Capacitor Cs offset

possible battery impedance. Measure current as shown above.

H48SN28012_09262006

ELECTRICAL CHARACTERISTICS CURVES

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

current and nominal input voltage with 12µH source impedance

and 220µF electrolytic capacitor (1A/div).

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

source inductor at nominal input voltage and rated load current

(10 mA/div)

Copper Strip

Vo(+)

SCOPE

RESISTIVE

LOAD

10u

Vo(-)

Figure 13: Output voltage noise and ripple measurement test

setup

H48SN28012_09262006

ELECTRICAL CHARACTERISTICS CURVES

30.0

25.0

20.0

15.0

10.0

5.0

Vin=48V

0.0

10 12 14 16 18 20

LOAD CURRENT (A)

Figure 14: Output voltage ripple at nominal input voltage and

rated load current (20 mV/div). Load capacitance:330uF

aluminum, 1µF ceramic capacitor and 10µFlow ESR capacitor.

Bandwidth: 20 MHz. 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 15: Output voltage vs. load current showing typical

current limit curves and converter shutdown points.

H48SN28012_09262006

DESIGN CONSIDERATIONS

Input Source Impedance

ꢀ

The input source must be insulated from the ac

mains by reinforced or double insulation.

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 220 to 470 µF electrolytic

capacitor (ESR < 0.1 Ω at 100 kHz) mounted close to

the input of the module to improve the stability.

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.

Layout and EMC Considerations

ꢀ

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.

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.

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.

Safety Considerations

The power module has extra-low voltage (ELV) outputs

when all inputs are ELV.

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.

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 20A 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.

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.

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.

When the input source is SELV, 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:

H48SN28012_09262006

FEATURES DESCRIPTIONS

Vi(+)

Vo(+)

Over-Current Protection

Sense(+)

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).

ON/OFF

Sense(-)

Vi(-)

Vo(-)

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.

Figure 16: Remote on/off implementation

Remote Sense

Over-Voltage Protection

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:

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 latch off. The

over-voltage latch is reset by either cycling the input

power or by toggling the on/off signal for one second.

[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).

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.

Vi(+) Vo(+)

Sense(+)

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.

Sense(-)

Vi(-) Vo(-)

Contact

Resistance

Contact and Distribution

Losses

Remote On/Off

Figure 17: Effective circuit configuration for remote sense

operation

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.

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.

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.

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.

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 to floating.

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.

H48SN28012_09262006

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 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 to obtain

a percentage output voltage change △% is defined

as:

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:

(

)

−

Vo⋅ 100 + ∆%

100 + 2∆%

∆%

⎡

⎢

⎣

⎤

⎥

⎦

Rtrim up=

ΚΩ

1.225⋅∆%

Ex. When Trim-up +10%(28.0V×1.1=30.8V)

100

⎛

⎜

⎝

⎞

⎠

Rtrim down=

Vo := 28.0V

∆ := 10

− 2 ΚΩ

∆%

(

)

−

Ex. When Trim-down -60%(28.0V×0.6=16.8V)

Vo ⋅ 100 + ∆

100 + 2 ⋅ ∆

= 239.429 KΩ

Vo := 28.0 V

∆ := 40

1.225⋅ ∆

∆

100

− 2 = 0.5K Ω

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.

H48SN28012_09262006

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.

Thermal Derating

Heat can be removed by increasing airflow over the module.

The module’s maximum case temperature is 110℃. 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.

Hence, the choice of equipment to characterize the

thermal performance of the power module is a wind

tunnel.

THERMAL CURVES

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’’).

Figure 21: Temperature measurement location

The allowed maximum hot spot temperature is defined at 110℃

H48SN28012NR A (Standard) Output Power vs. Hot Spot Temperature

PWB

Output Power (W)

(Either Orientation)

FACING PWB

400

350

300

250

200

150

100

MODULE

AIR VELOCITY

AND AMBIENT

TEMPERATURE

MEASURED BELOW

50.8 (2.0”)

12.7 (0.5”)

THE MODULE

AIR FLOW

105

Hot Spot Temperature(℃)

Figure 22: Output power vs. hot spot temperature (Either

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

Orientation)

Figure 20: Wind Tunnel Test Setup

H48SN28012_09262006

MECHANICAL DRAWING

Pin No.

Name

Function

-Vin

Negative input voltage

Case ground

Remote ON/OFF

Positive input voltage

Positive output voltage

Positive remote sense

Output voltage trim

Negative remote sense

Negative output voltage

CASE

ON/OFF

+Vin

+Vout

+SENSE

TRIM

-SENSE

-Vout

Pin Specification:

Pins 1-4, 6-8

Pins 5 & 9

1.00mm (0.040”) diameter

2.00mm (0.079”) diameter

All pins are copper with Tin plating.

H48SN28012_09262006

PART NUMBERING SYSTEM

280

Form

Factor

H- Half

Brick

Input

Voltage

48V

Number of Product

Output

Voltage

280- 28V

Output

Current

ON/OFF

Logic

Length

Option Code

Outputs

Series

F- RoHS 6/6

(Lead Free)

S- Single

N- 350W

series

12- 12.5A N- Negative R- 0.170”

P- Positive N- 0.145”

K- 0.110”

A - Standard

Functions

B - no thread

heatsink mounting

hole

MODEL LIST

MODEL NAME

INPUT

OUTPUT

EFF @ 100% LOAD

91%

H48SN28012NRFA

36V~75V

12.5A

28V

12.5A

Default remote on/off logic is negative and pin length is 0.170”

For different remote on/off logic and pin length, please refer to part numbering system above or contact your local sales

CONTACT: www.delta.com.tw/dcdc

USA:

Telephone:

East Coast: (888) 335 8201

West Coast: (888) 335 8208

Fax: (978) 656 3964

Email: DCDC@delta-corp.com

Europe:

Asia & the rest of world:

Telephone: +886 3 4526107 ext 6220

Fax: +886 3 4513485

Phone: +41 31 998 53 11

Fax: +41 31 998 53 53

Email: DCDC@delta-es.com

Email: DCDC@delta.com.tw

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.

H48SN28012_09262006

H48SN28012PNFA [DELTA]

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