Q48SA54001NNH - Delta Electronics Inc.

PRELIMINARY DATASHEET

DS_Q48SA54001_05142009

FEATURES

 High efficiency 92% @54V/1.5A

 Size:

57.9x36.8x9.8mm (2.28”x1.45”x0.39”)

(w/o Heat Spreader)

57.9x36.8x12.7mm (2.28”x1.45”x0.50”)

(with Heat Spreader)

 Standard footprint

 Industry standard pin out

 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), and TUV

(EN60950-1) - pending

APPLICATIONS

 Telecom / Datacom

 Wireless Networks

 Optical Network Equipment

 Server and Data Storage

 Industrial / Testing Equipment

OPTIONS

 Positive, negative, or no On/Off

 OTP and Output OVP, OCP mode,

Auto-restart (default) or latch-up

Delphi Series Q48SA, 80W Quarter Brick Family

DC/DC Power Modules: 36~75V in, 54V/1.5A out

The Delphi Q48SA series quarter Brick, 36~75V 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 operates from a wide 36~75V input voltage

range and provides up to 80 watts of power in an industry standard

footprint and pinout. With creative design technology and optimization

of component placement, these converters possess outstanding

electrical and thermal performances, 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.

DS_Q48SA54001_05142009

TECHNICAL SPECIFICATIONS

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

PARAMETER NOTES and CONDITIONS Q48SA54001 (Standard)

Min. Typ. Max. Units

ABSOLUTE MAXIMUM RATINGS

Input Voltage

Continuous 80 Vdc

Transient (100ms) 100ms 100 Vdc

Operating Case Temperature (Open-frame Version) Please refer to Figure 20 -40 115 °C

Operating Case Temperature (Heat spreader Version) Please refer to Figure 22 -40 114 °C

Storage Temperature -55 125 °C

Input/Output Isolation Voltage 1 minute 2250 Vdc

INPUT CHARACTERISTICS

Operating Input Voltage 36 48 75 Vdc

Input Under-Voltage Lockout

Turn-On Voltage Threshold 32 35 Vdc

Turn-Off Voltage Threshold 29 32 Vdc

Lockout Hysteresis Voltage 2 4 Vdc

Maximum Input Current 100% Load, 36Vin 3.5 A

No-Load Input Current 50 mA

Off Converter Input Current Vin=48V 8 mA

Inrush Current(I2t) 1 A2s

Input Reflected-Ripple Current P-P thru 12µH inductor, 5Hz to 20MHz 10 mA

Input Voltage Ripple Rejection 120 Hz 50 dB

OUTPUT CHARACTERISTICS

Output Voltage Set Point Vin=48V, Io=Io.max, Tc=25°C 52.7 53.5 54.2 Vdc

Output Voltage Regulation

Over Load Io=Io,min to Io,max +20 +802.5 mV

Over Line Vin=36V to 75V +20 +267.5 mV

Over Temperature Tc=-40°C to 100°C 0.02 %Vo/°C

Total Output Voltage Range over sample load, line and temperature 51.9 55.1 V

Output Voltage Ripple and Noise 5Hz to 20MHz bandwidth, Full load

Peak-to-Peak (high frequency low ESR external capacitor required) 100 200 mV

RMS (high frequency low ESR external capacitor required) 30 50 mV

Operating Output Current Range 0 1.5 A

Output DC Current-Limit Inception Output Voltage 10% Low 1.65 2.25 A

DYNAMIC CHARACTERISTICS

Output Voltage Current Transient 48V, 220µF electrolytic& 1µF Ceramic load cap, 0.1A/µs

Positive Step Change in Output Current 25% Io.max to 50% Io.max 750 mV

Negative Step Change in Output Current 50% Io.max to 25% Io.max 750 mV

Settling Time (within 1% Vout nominal) TBD µs

Turn-On Transient

Start-Up Time, From On/Off Control 100 200 ms

Start-Up Time, From Input 100 200 ms

External Output Capacitance Full load; 5% overshoot of Vout at startup 100 220 2200 µF

EFFICIENCY

100% Load Vin=48V 92.0 %

60% Load Vin=48V 91.5 %

ISOLATION CHAR ACTER IS TICS

Input to Output 2250 Vdc

Isolation Resistance 10 MΩ

Isolation Capacitance 1000 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 -0.7 1.2 V

Logic High (Module Off) Von/off at Ion/off=0.0 µA 3.5 15 V

ON/OFF Control, Positive Remote On/Off logic

Logic Low (Module Off) Von/off at Ion/off=1.0mA 0 1.2 V

Logic High (Module On) Von/off at Ion/off=0.0 µA 3.5 15 V

ON/OFF Current (for both remote on/off logic) Ion/off at Von/off=0.0V 1.5 mA

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

Output Over-Voltage Protection (Hiccup Mode) Over full temp range; % of nominal Vout 57 65 V

GENERAL SPECIFICATIONS

MTBF Io=80% of Io, max; Tc=40°C TBD M hours

Weight 43 grams

Over-Temperature Shutdown (Openframe Version) Please refer to Figure 20 125 °C

Over-Temperature Shutdown (Heat spreader Version) Please refer to Figure 22 126 °C

DS_Q48SA54001_05142009

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.

0.0

0.3

0.6

0.9

1.2

1.5

1.8

2.1

2.4

2.7

3.0

30 35 40 45 50 55 60 65 70 75

INPUT VOLTAGE (V)

INPUT CURRENT (A) 1

Figure 3: Typical full load input characteristics at room

temperature.

10 20 30 40 50 60 70 80 90 100

OUTPUT CURRENT( A %)

POWER DISSIPATION (W)

75Vin

48Vin

36Vin

100

10 20 30 40 50 60 70 80 90 100

OUTPUT CURRENT( A %)

EFFICIENCY (%) 1

36Vin 48Vin 75Vin

DS_Q48SA54001_05142009

ELECTRICAL CHARACTERISTICS CURVES

For Negative Remote On/Off Logic

Figure 4: Turn-on transient at full rated load current (20ms/div).

Top Trace: Vout; 10V/div; Bottom Trace: ON/OFF input: 5V/div.

Figure 5: Turn-on transient at zero load current (20 ms/div).

Top Trace: Vout: 10V/div; Bottom Trace: ON/OFF input:5V/div.

For Input Voltage Start up

Figure 6:Turn-on transient at full rated load current (20 ms/div).

Top Trace: Vout; 10V/div; Bottom Trace: input voltage: 50V/div.

Figure 7: Turn-on transient at zero load current (20 ms/div).

Top Trace: Vout; 10V/div; Bottom Trace: input voltage: 50V/div.

DS_Q48SA54001_05142009

ELECTRICAL CHARACTERISTICS CURVES

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

current (50%-25% of Io, max; di/dt = 0.1A/µs). Load cap: 220µF

aluminum capacitor and 1µF ceramic capacitor. TOP Trace:

Vout (200mV/div),Bottom Trace: Iout (500mA/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 (25%-50% of Io, max; di/dt = 0.1A/µs). Load cap:

220µF aluminum capacitor and 1µF ceramic capacitor. TOP

Trace: Vout (200mV/div), Bottom Trace: Iout (500mA/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. Measure current as shown above.

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

current and nominal input voltage with 12µH source impedance

and 33µF electrolytic capacitor (200mA/div

，

2us/div).

DS_Q48SA54001_05142009

ELECTRICAL CHARACTERISTICS CURVES

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

source inductor at nominal input voltage and rated load current

(20mA/div

，

2us/div).

Figure 13: Output voltage noise and ripple measurement test

setup.

0.3 0.5 0.7 0.9 1.1 1.3 1.5 1.7 1.9 2.1 2.3

LOA D CURRENT( A )

OUTPUT VOLTAGE(V) 1

Figure 14: Output voltage ripple at nominal input voltage and

rated load current (Io=1.5A)(50mV/div, 2us/div)

Load capacitance: 1µF ceramic capacitor and 220µF

electrolytic capacitor. Bandwidth: 20MHz. 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.

DS_Q48SA54001_05142009

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 10μF to 100μF 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

end-user’s safety agency standard, i.e., UL60950-1,

CAN/CSA-C22.2, No. 60950-1 and EN60950-1+A11 and

IEC60950-1, 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 / heatspreader is grounded

the output must be also 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 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.

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_Q48SA54001_05142009

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. The default OVP operation is hiccup

mode. Under hiccup mode, the modules will try to restart

after shutdown. If the over voltage condition still exists,

the module will shut down again. This restart trial will

continue until the over-voltage condition is corrected.

Also, an optional latch-off mode for OVP is available. 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.

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 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 to floating.

Figure 16: Remote on/off implementation

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 Vout1 (+) or

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

feature is not used.

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

voltage)

If the external resistor is connected between the TRIM

and sense (-) pin, the output voltage set point increases

(Fig. 17). The external resistor vvalue required to obtain

output voltage change ∆U is defined as:

)(7.4

U5.127 Ω−

−KR uptrim

Ex. When Trim-up 5%，∆U is 5%*Vnormal = 0.05*53.5 =

2.675

Ω=−=

−KR uptrim 96.427.4

675.2 5.127

DS_Q48SA54001_05142009

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

IR FLO

50.8

(

2.0”

)

FACING PWB PWB

AIR VELOCIT

AND AMBIENT

TEMPERATURE

MEASURED BELOW

THE MODULE

Figure 19: 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.

Figure 18: Circuit configuration for trim-down (decrease

output voltage)

If the external resistor is connected between the TRIM

and sense(+), Vout decreases (Fig. 18). The external

resistor value required to obtain output voltage change

∆U is defined as:

)(7.55

51*51 Ω−

−K

Rdowntrim

Ex. When Trim-down 15%，∆U is 15%*Vnormal =

0.15*53.5 = 8.025

)(4.2687.55

025.8 51*51 Ω=−=

−KR downtrim

When using trim-up, 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_Q48SA54001_05142009

THERMAL CURVES

Figure 20: Temperature measurement location

* The allowed maximum hot spot temperature is defined at 125

℃

Figure 22: Temperature measurement location

* The allowed maximum hot spot temperature is defined at 126

℃

Q48SA54001 (standard) Output Current vs. Ambient Temperature and Air Velocity

@Vin=48V (Transverse Orientation)

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

Output Power(W)

Ambient Tem

erature

(

℃

)

Natural

Convection

100LFM

200LFM

Q48SA54001 (standard) Output Current vs. Ambient Temperature and Air Velocity

@Vin=48V (Transverse Orientation,With Heatspreader)

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

Output Power(W)

Ambient Temperature (℃)

Natural

Convection

100LFM

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

@Vin=48V(Transverse Orientation, Openframe)

Figure 23: Output current vs. ambient temperature and air velocity

@Vin=48V(Transverse Orientation, With Heat spreader)

DS_Q48SA54001_05142009

MECHANICAL DRAWING (WITHOUT HEAT SPREADER)

Pin No. Name Function

+Vin

ON/OFF

Case

-Vin

-Vout

-Sense

Trim

+Sense

+Vout

Positive input voltage

Remote ON/OFF

Optional

Negative input voltage

Negative output voltage

Negative remote sense

Output voltage trim

Positive remote sense

Positive output voltage

Pin Specification:

Pins 1-4,6-8 1.00mm (0.040”) diameter

Pins 5 & 9 1.50mm (0.059”) diameter

All pins are copper with Tin plating.

DS_Q48SA54001_05142009

MECHANICAL DRAWING (WITH HEAT SPREADER)

* For modules with through-hole pins and th e optional heatspreader, they are intended for wave soldering assem bly

onto system boards; please do not subject su ch modules through reflow temperatur e profile.

DS_Q48SA54001_05142009

PART NUMBERING SYSTEM

Q 48 S A 540 01 N N H

Form

Factor

Input

Voltage

Number of

Outputs

Product

Series

Output

Voltage

Output

Current

ON/OFF

Logic

Length

Option Code

Q - Quarter

Brick

48 -

36~75V

S - Single A - Advanced 540 - 54V 01- 1.5A

N -

Negative

R - 0.170”

N - 0.145”

Space- RoHs 5/6

F- RoHS 6/6

(Lead Free)

H - with Heatspreader

MODEL LIST

MODEL NAME INPUT OUTPUT EFF @ 100% LOAD

Q48SA54001NN H 36V~75V 3.5 A 54V 1.5A 92%

* Standard OCP, OVP, OTP operations are auto-res tart or hiccup.

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:

Phone: +41 31 998 53 11

Fax: +41 31 998 53 53

Email: DCDC@delta-es.com

Asia & the rest of world:

Telephone: +886 3 4526107

ext 6220~6224

Fax: +886 3 4513485

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.