E24SR12005PMFA [DELTA]

Delphi Series E24SR, 66W Eighth Brick Family DC/DC Power Modules: 24V in, 12V/5A out; 德尔福系列E24SR ， 66W第八届砖系列DC / DC电源模块：， 12V / 5A 24V出来


型号：	E24SR12005PMFA
厂家：	DELTA ELECTRONICS, INC.
描述：	Delphi Series E24SR, 66W Eighth Brick Family DC/DC Power Modules: 24V in, 12V/5A out 德尔福系列E24SR ， 66W第八届砖系列DC / DC电源模块：， 12V / 5A 24V出来电源电路
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中文：	中文翻译
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FEATURES

ꢀ

High efficiency: 90.5% @ 12V/ 5A

ꢀ

Size: 58.4mmx22.8mmx10.0mm

(2.30”x0.90”x0.39”)

ꢀ

SMD and Through-hole versions

Industry standard pin out

2:1 input range

Fixed frequency operation

Input UVLO, Output OTP, OCP, OVP

Basic insulation

2250V isolation

Monotonic startup into normal and

pre-biased loads

ꢀ

Output voltage trim:±10%

No minimum load required

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

directive

Delphi Series E24SR, 66W Eighth Brick Family

DC/DC Power Modules: 24V in, 12V/5A out

OPTIONS

The Delphi Series E24SR Eighth Brick, 24V 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 either a through-hole or surface-mounted

package and provides up to 66 watts of power or 20A of output current

(3.3V and below) in an industry standard footprint and pinout. The

E24SR converter operates from an input voltage of 18V to 36V and is

available in output voltages from 3.3V to 12V. Efficiency for the 12V

output is 90.5% at 5A 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.

ꢀ

Positive On/Off logic

SMD pin

Short pin lengths available

APPLICATIONS

ꢀ

Telecom/DataCom

Wireless Networks

Optical Network Equipment

Server and Data Storage

Industrial/Test Equipment

DATASHEET

DS_E24SR12005_02092007

TECHNICAL SPECIFICATIONS

(T_A=25°C, airflow rate=300 LFM, V_in=24 Vdc, nominal Vout unless otherwise noted.)

PARAMETER

NOTES and CONDITIONS

E24SR12005 (Standard)

Min.

Typ.

Max.

Units

ABSOLUTE MAXIMUM RATINGS

Input Voltage

Continuous

Transient (100ms)

Operating Temperature

Storage Temperature

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

No-Load Input Current

125

2250

Vdc

°C

Vdc

100ms

Refer to figure 21 for measuring point

-55

Vdc

0.7

17.8

1.5

3.8

180

Vdc

A²s

100% Load, 18Vin

150

Off Converter Input Current

Inrush Current (I²t)

0.1

Input Reflected-Ripple Current

Input Voltage Ripple Rejection

OUTPUT CHARACTERISTICS

Output Voltage Set Point

Output Voltage Regulation

Over Load

Over Line

Over Temperature

Total Output Voltage Range

Output Voltage Ripple and Noise

Peak-to-Peak

P-P thru 12µH inductor, 5Hz to 20MHz

120 Hz

Vin=24V, Io=Io.max, Tc=25°C

11.82

11.76

12.18

Vdc

Io=Io, min to Io, max

Vin=18V to36V

Tc=-40°C to100°C

±3

±100

±10

Over sample load, line and temperature

5Hz to 20MHz bandwidth

Full Load, 1µF ceramic, 10µF tantalum

12.24

100

RMS

Operating Output Current Range

Output Over Current Protection

DYNAMIC CHARACTERISTICS

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

110

Output Voltage 10% Low

140

10µF Tan & 1µF Ceramic load cap, 0.1A/µs

50% Io.max to 75% Io.max

180

150

250

75% Io.max to 50% Io.max

Start-Up Time, From On/Off Control

Start-Up Time, From Input

Back bias start-up

≤ 90% of nominal output voltage

Back drive current limit while pin on-off is enabled

Back drive current limit while pin on-off is disabled

Maximum Output Capacitance

EFFICIENCY

Io=0A

0.1

2000

µF

Full load; 5% overshoot of Vout at startup

100% Load

60% Load

90.5

ISOLATION CHARACTERISTICS

Input to Output

Isolation Resistance

Isolation Capacitance

FEATURE CHARACTERISTICS

Switching Frequency

2250

Vdc

MΩ

1500

350

kHz

ON/OFF Control, Negative Remote On/Off logic

Logic Low (Module On)

-0.7

0.5

Logic High (Module Off)

ON/OFF Control, Positive Remote On/Off logic

Logic Low (Module Off)

-0.7

0.5

Logic High (Module On)

On/off pin open circuit voltage

On/off pin pull down resistance

Output Voltage Trim Range

Output Voltage Remote Sense Range

Output Over-Voltage Protection

GENERAL SPECIFICATIONS

MTBF

9.6

Kohm

-10

Pout ≦ max rated power

Over full temp range;

+10

16.8

13.8

Io=80% of Io, max; Ta=25°C, 300LFM airflow

Refer to figure 21 for measuring point

TBD

22.0

130

M hours

grams

°C

Weight

Over-Temperature Shutdown

DS_E24SR12005_ 01182007

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.

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

0.0

INPUT VOLTAGE (V)

Figure 3: Typical full load input characteristics at room

temperature

DS_E24SR12005_ 01182007

ELECTRICAL CHARACTERISTICS CURVES

For Negative Remote On/Off Logic

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

load) (2 ms/div). Vin=24V. Top Trace: Vout, 5.0V/div; Bottom

Trace: ON/OFF input, 10V/div

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

Vin=24V. Top Trace: Vout: 5.0V/div, Bottom Trace: ON/OFF

input, 10V/div

For Positive Remote On/Off Logic

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

load) (2 ms/div). Vin=24V. Top Trace: Vout, 5.0V/div; Bottom

Trace: ON/OFF input, 10V/div

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

Vin=24V Top Trace: Vout, 5.0V/div; Bottom Trace: ON/OFF

input, 10V/div

DS_E24SR12005_ 01182007

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 (100mV/div, 200us/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

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

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

470µF, 35mΩ ESR solid electrolytic capacitor and 1µF ceramic

capacitor.

Top Trace: Vout (100mV/div, 200us/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

Figure 10: Test set-up diagram showing measurement points

for Input Terminal Ripple Current and Input Reflected Ripple

Current.

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

current and nominal input voltage with 12µH source impedance

and 33µF electrolytic capacitor (200 mA/div, 2us/div)

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

DS_E24SR12005_ 01182007

ELECTRICAL CHARACTERISTICS CURVES

Copper Strip

Vo(+)

Vo(-)

SCOPE

RESISTIV

LOAD

10u

Figure 12: Input reflected ripple current, i_s, 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

14.0

12.0

10.0

8.0

6.0

4.0

2.0

0.0

Load Current (A)

Figure 14: Output voltage ripple at nominal input voltage and

rated load current (Io=5A)(20 mV/div, 2us/div)

Figure 15: Output voltage vs. load current showing typical

current limit curves and converter shutdown points

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_E24SR12005_ 01182007

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 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.

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

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.

compliance design.

Application notes to assist

designers in addressing these issues are pending

release.

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 15A 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 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:

DS_E24SR12005_ 01182007

FEATURES DESCRIPTIONS

Vo(+)

Sense(-)

Trim

Vi(+)

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.

ON/OFF

Vi(-)

Sense(-)

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

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:

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.

[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

Vo(+)

Sense(-)

Trim

Vi(+)

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.

ON/OFF

Vi(-)

Load

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.

Vo(-)

Distribution

resistance

Figure 17: Effective circuit configuration for remote sense

operation

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.

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.

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.

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.

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.

Care should be taken to ensure that the maximum

output power does not exceed the maximum rated

power.

DS_E24SR12005_ 01182007

FEATURES DESCRIPTIONS (CON.)

Output Voltage Adjustment (TRIM)

To increase or decrease the output voltage set point,

connect 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:

5.11Vo (100 + ∆ ) 511

Rtrim − up =

−

− 10.2

(

KΩ

)

1.225 ∆

∆

511

⎡

⎤

Rtrim − down =

− 10.2

(

KΩ

)

Ex. When Trim-up +10% (12V×1.1=13.2V)

⎢

⎣

⎥

⎦

∆

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

5.11×12×(100 +10) 511

Rtrim − up =

−

−10.2 = 489.3

(

KΩ

)

1.225×10

511

⎡

⎤

Rtrim − down =

− 10.2

(

KΩ

)

= 40.9

(

KΩ

)

⎢

⎣

⎥

⎦

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.

DS_E24SR12005_ 01182007

THERMAL CONSIDERATIONS

Thermal Derating

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.

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.

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: Hot spot temperature measured point

The allowed maximum hot spot temperature is defined at 125℃

E24SR12005(Standard) Output Current vs. Ambient Temperature and Air Velocity

Output Current(A)

@Vin = 24V (Transverse Orientation)

Natural

Convection

PWB

MODULE

FACING PWB

AIR VELOCITY

AND AMBIENT

TEMPERATURE

MEASURED BELOW

THE MODULE

50.8 (2.0”)

Ambient Temperature (℃)

AIR FLOW

Figure 22: Output current vs. ambient temperature and air velocity

@V_in=24V (Transverse Orientation)

12.7 (0.5”)

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

Figure 20: Wind tunnel test setup figure

DS_E24SR12005_ 01182007

PICK AND PLACE LOCATION

SURFACE-MOUNT TAPE & REEL

RECOMMENDED PAD LAYOUT (SMD)

DS_E24SR12005_ 01182007

LEADED (Sn/Pb) PROCESS RECOMMEND TEMP. PROFILE

Peak temp.

2nd Ramp-up temp.

210~230°C 5sec.

1.0~3.0°C /sec.

250

Pre-heat temp.

140~180°C 60~120 sec.

200

Cooling down rate <3°C /sec.

Ramp-up temp.

0.5~3.0°C /sec.

150

100

Over 200°C

40~50sec.

120

Time ( sec. )

180

240

300

Note: The temperature refers to the pin of E24SR, measured on the pin +Vout joint.

LEAD FREE (SAC) PROCESS RECOMMEND TEMP. PROFILE

Temp

Peak Temp. 240 ~ 245 ℃

217℃

200℃

Ramp down

max. 4℃/sec.

Preheat time

100~140 sec.

150℃

25℃

Time Limited 90 sec.

above 217℃

Ramp up

max. 3℃/sec.

Time

Note: The temperature refers to the pin of E24SR, measured on the pin +Vout joint.

DS_E24SR12005_ 01182007

MECHANICAL DRAWING

Surface-mount module

Through-hole module

Pin No.

Name

Function

-Vin

ON/OFF

+Vin

+Vout

+SENSE

TRIM

-SENSE

-Vout

Negative input voltage

Remote ON/OFF

Positive input voltage

Positive output voltage

Positive remote sense

Output voltage trim

Negative remote sense

Negative output voltage

DS_E24SR12005_ 01182007

PART NUMBERING SYSTEM

120

ON/OFF

Logic

Type of

Product

Input

Voltage

Number of Product

Output

Voltage

Output

Current

Length/Type

Option Code

Outputs

Series

E - Eighth 24-18V~36V S - Single

Brick

R- Regular

120 - 12V

05 - 05A N- Negative

P- Positive

R - 0.170”

N - 0.145”

K - 0.110”

M - SMD

A - Standard

Functions

F- RoHS 6/6

(Lead Free)

MODEL LIST

MODEL NAME

INPUT

OUTPUT

EFF @ 100% LOAD

18V~36V

E24SR3R320NRFA

E24SR05012NRFA

E24SR06508NRFA

E24SR12005NRFA

5.0A

4.2A

3.4A

3.3V

5.0V

6.5V

12V

20A

12A

90%

90.5%

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 office.

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

Asia & the rest of world:

Telephone: +886 3 4526107 ext 6220

Fax: +886 3 4513485

Europe:

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.

DS_E24SR12005_ 01182007

E24SR12005PMFA [DELTA]

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